Frequently Asked Questions

Answers, by topic.

Everything we get asked, organized into nine plain-English categories — from how the 21+ attestation works to how your COA gets generated. Can’t find what you’re looking for? Contact support and a person will answer.

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FAQ

Common questions, answered.

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peptriva sells to qualified researchers aged 21+ who are buying research peptides for bona fide laboratory work. That includes academic and government labs, contract research organizations, industry R&D teams, and independent researchers with an institutional or research-context affiliation. We do not sell to consumers for in-vivo, therapeutic, or personal use — see the Research-Use Policy for the full definition.
Before you can create an account or check out, you confirm two things: (1) you are at least 21 years old, and (2) you are acquiring our products exclusively for in-vitro laboratory research and not for human or veterinary administration. The attestation is timestamped, IP-logged, and binding under the Terms and Waiver Agreement.
No — the catalog and quality pages are all public. Ordering doesn’t require an account either: you’ll confirm the research-use acknowledgment at checkout, and an optional account keeps your COAs and order history in one place.
Click Log in in the top-right and choose Create account. Provide your email, set a password, then complete the 21+ and Qualified Researcher attestation. Institutional buyers can add an organization name and role to their profile. No account is needed to place an order — checkout confirms your details, and you can add a password any time with an emailed sign-in link.
We currently ship within the US only. You can browse the catalog from anywhere, but checkout is restricted to US shipping addresses. International expansion is on the roadmap — sign up for the newsletter to be notified when we add destinations.
45 research compounds, spanning cytoprotective and actin-binding-fragment peptides, copper complexes, growth-hormone-axis peptides, mitochondrial and redox compounds, neuropeptides, and laboratory consumables. Availability changes as lots sell through. Browse the current catalogue oncatalog.
A way to group compounds by molecular family, never by any use or result. Cytoprotective groups the gastric-peptide and actin-binding-fragment families; GH secretagogues groups GHRH-receptor and GHS-R1a ligands; peptide analogs groups synthetic analogs of endogenous peptides; mitochondrial groups mitochondrial-derived peptides and nucleotide precursors; melanocortin and neuropeptides group melanocortin-receptor and other CNS-receptor ligands; copper peptides groups copper-tripeptide complexes; senescence / antioxidant groups redox-active compounds; and lab consumables covers solvents and supplies.
Everything we sell is a lab-tested reference compound supplied for in-vitro laboratory research. None of it is a medicine, none of it is approved by the FDA for human or veterinary use, and we do not supply any product for use in or on the body. See the Research-Use Policy.
Some peptides on our catalog (notably BPC-157) are on the FDA Category 2 503A list, which restricts compounding-pharmacy access — not their sale or possession as research chemicals. We disclose the regulatory status of each peptide where the literature has it, and we don’t suggest in-vivo use of any of them. Our lab-tested BPC-157 is for in-vitro laboratory study only.
A drug is a regulated pharmaceutical product approved for a specific human or animal indication, manufactured to the regulator's drug-manufacturing standard, prescribed or sold under the relevant law. A research peptide is the same chemical entity, synthesized to a lab-tested specification, sold to qualified researchers as a reference reagent for in-vitro laboratory study. Same molecule, completely different regulatory pathway, completely different intended use.
Synthesis difficulty scales with length and modifications. A short tripeptide like KPV is much cheaper to synthesize and purify than a 39-residue acylated peptide. Cyclic peptides, peptides with non-standard amino acids, and acylated/PEGylated derivatives add cost on top. Our pricing reflects that — we don’t mark up small peptides to subsidize large ones.
ISO/IEC 17025 is the international standard for testing and calibration laboratories. A lab accredited to ISO 17025 has demonstrated it can produce technically valid, traceable results — the gold standard for pharma analytical work. We use independent ISO 17025–accredited contract labs for identity, purity, and endotoxin testing. Details on the Quality page.
We use independent ISO 17025–accredited CRO / CDMO labs for identity (LC-MS), purity (RP-HPLC), and endotoxin (LAL) testing under documented chain-of-custody. We don’t own them and they grade our lots blind to our internal QC, and we don’t publicly name them. See the Quality · Third-party labs section.
Each lot is tested for: (1) HPLC purity — RP-HPLC area-%; (2) LC-MS identity — mass-match to reference, <5 ppm tolerance; (3) Endotoxin — LAL in accordance with USP <85>, run in duplicate; (5) Heavy metals — ICP-MS per ICH Q3D; (6) Counter-ion content — quantified so the COA weight is the actual peptide weight, not salt; plus net content per vial. See the Methods section.
Twice — by two independent checks before anything ships. The manufacturer tests and releases each batch with a full COA when production is finished. Then, when the lot arrives at our cold-chain-certified distribution facility, an independent ISO 17025–accredited third-party lab re-runs identity, purity, endotoxin and microbial screening. Only after both pass does the lot clear for two-day shipping, and both certificates are matched to the lot number on your vial. See the Quality · Tested twice section.
Both happen in the United States. Every lot is re-assayed by an independent U.S. laboratory — identity by LC-MS, purity by HPLC-UV, net content against the label, and bacterial endotoxin by LAL to USP <85> at ≤0.05 EU/mL — and no lot is released for sale until that U.S. certificate of analysis is on file and matched to the lot number on your vial. Orders are then picked, packed and shipped from our California facility on FedEx 2-day tracked. We distribute within the United States only. See the Quality page.
A COA lists each test, the spec, the result, and a pass/fail. Identity shows the observed mass and the Δppm to the reference. Purity shows the area-% from the HPLC chromatogram. Endotoxin is reported as a pass for each replicate rather than as a number; the certificate also prints the assay's detection sensitivity, which is not a limit. Microbial screening by PCR appears on the bacteriostatic water certificate. Heavy metals and acetate counter-ion are listed below in mg/kg or w/w. A plain-language COA glossary is on the way — in the meantime, open a sample on the COA Library.
Yes. The COA Library displays the most recent released lot per peptide, but per-lot retrieval is coming soon. If you have a lot number in hand and need its specific COA today, email quality@peptriva.com with the lot ID and we’ll send it within one business day.
That shouldn’t happen — only lots that pass every test are released. But if it ever does, the peptriva Out-of-Spec Replacement covers it: we replace the affected vials from the next available conforming batch and refund the purchase price of the affected units. It’s the exclusive remedy for analytical-specification non-conformance — details in the Research-Use Policy · section 8.
Sealed lyophilized vials are stable for years at −20°C. Most can sit at room temperature for 30 days without measurable degradation, which is why we ship them ambient. For long-term storage, keep them frozen at −20°C in the original sealed vial with desiccant. Check each peptide’s individual storage recommendation on its product page or the catalog.
FedEx 2-day standard. Orders placed before 5pm ET ship same-day from our California warehouse; orders after the cut-off ship the next business day. Free shipping on every order. You’ll get a tracking link by email the moment your package leaves.
No — we ship within the US only. Many research peptides have export-control implications and we’d rather not ship into a regulatory grey zone until our process can handle each jurisdiction’s compliance properly. International expansion is on our roadmap.
We store and handle every lot in a cold-chain-certified distribution facility, but shipments go out in standard ambient-temperature parcel packaging. Lyophilized peptides are stable at room temperature for weeks, so they don’t need cold-chain transit, and we don’t sell pre-dissolved liquid preparations or sterile fills that would. Move your vials to refrigerator or freezer storage on arrival per the storage line on its product page.
No — no signature is required at delivery. FedEx will leave the package at your address per their standard delivery practice. Every package is tracked with real-time updates by email; if a redelivery is needed, FedEx will reattempt up to three times before holding it at a local depot for pickup.
Yes — any order placed before 5pm ET ships same business day via FedEx 2-day. Orders placed after the cut-off ship the next business day. We can’t upgrade service levels after a label is generated, so place orders early in the day if speed matters.
You’ll receive a tracking link by email when your package is handed to the carrier. Tracking is also visible on your account dashboard — click any order to see live carrier status, ETA, and delivery proof.
No — all sales are final. Research peptides are sterile, temperature-sensitive, integrity-controlled materials. Once they leave our facility we can’t verify chain of custody or storage conditions, which means returned product can’t be re-stocked or re-released. We do offer free re-shipment for damaged, lost, or wrong shipments — see the next question.
Send us a photo of the damaged packaging and the lot number within 7 days of delivery to support@peptriva.com and we’ll re-ship the affected vials free of charge — no return required. Shipping damage is replaced 1:1 from the same batch where stock allows.
If an independent test demonstrates a shipped batch failed any of the published COA specifications, we’ll replace the affected vials from the next conforming batch and refund the purchase price of the affected units. It’s the exclusive remedy for analytical-specification non-conformance — details in the Research-Use Policy and Terms Part B.
Email support@peptriva.com within 7 days of delivery with: (1) your order number, (2) the lot number on the affected vial, (3) photos of the packaging and product, and (4) a brief description of what arrived wrong. We respond within one business day with a replacement plan or refund.
Default is replacement from the next conforming batch — same lot family where possible. If we can’t replace within a reasonable window (out of stock with no upcoming batch), we issue a full refund to the original payment method. Customers on a recurring schedule can take store credit toward their next scheduled shipment.
Visa and Mastercard credit and debit cards (American Express and Discover aren’t supported), Apple Pay, Google Pay, and ACH bank transfer for institutional buyers above $500, and cryptocurrency. Card data is processed by our PCI-compliant payment provider — we never see or store full card numbers.
Common reasons: AVS mismatch (your billing zip doesn’t match what the bank has), CVV mismatch, the issuer blocked the transaction as “research chemicals,” or a stale card. Try a different card or contact your bank — we don’t see the decline reason in real time. If a card keeps failing, email support@peptriva.com and we can offer ACH for the order.
We don’t currently collect sales tax, so the price you see at checkout is the price you pay. If that changes, any applicable tax will be shown at checkout before you confirm your order.
Research Use Only (RUO) means our products are sold strictly for in-vitro laboratory research by qualified researchers — not for human or veterinary administration, not as drugs, supplements, foods, or cosmetics. The full definition (including prohibited uses and your obligations as a buyer) is in the Research-Use Policy and the Waiver Agreement.
Because we’re a chemical supplier, not a healthcare provider. Providing human dosing guidance would constitute practicing medicine without a license and would convert our lab-tested products into unapproved drugs. These compounds are supplied for laboratory research only; applying them to a human or animal subject is outside our scope and is prohibited by our Terms.
Section 503A of the Federal Food, Drug, and Cosmetic Act governs traditional compounding pharmacies. The FDA maintains a Category 2 list of bulk drug substances they’ve flagged as “may present significant safety risks” in compounding — restricting 503A pharmacy access. BPC-157 was added to the Cat 2 list in 2023. The list affects compounding, not the sale of these chemicals as lab-tested reagents to qualified researchers.
No — an IRB protocol is required for human-subjects research, which is something our products are not for. We sell lab-tested reference compounds for in-vitro work and bench-level analysis. If your work does involve human subjects, you should be operating under an IRB-approved protocol and sourcing from a licensed pharmaceutical supplier, not a research-chemical vendor.
Misrepresenting researcher status, intended use, or jurisdiction is a material breach of the Terms and Waiver. Consequences include order cancellation, account termination, forfeiture of loyalty rewards, and where appropriate referral to regulatory authorities. We monitor for resale patterns and prohibited-use language in support tickets. The release-of-claims language in the Waiver section 4 means peptriva isn’t liable for harm arising from prohibited use — it’s on you.
Encryption in transit (TLS 1.3) and at rest, passwords hashed with bcrypt, payment data handled exclusively by our PCI-compliant provider (we never see full card numbers), access controls and audit logs on all admin actions, and regular third-party security reviews. The full breakdown is in Privacy Policy · section A.8 Security.
No. We don’t sell personal information for monetary consideration. Under CCPA/CPRA we share certain categories of data with analytics and advertising partners for business purposes — you can opt out at any time from your account privacy settings or by emailing privacy@peptriva.com. Full disclosure in the Privacy Policy.
From your account dashboard: Settings → Privacy → Delete account. Or email privacy@peptriva.com. We process deletion within 30 days. Note that order history and attestation records may be retained for legal compliance (tax records, regulatory audit trails) even after account deletion — the Privacy Policy section A.4 covers retention windows.
Primary infrastructure is hosted in the United States with a major cloud provider. Some processing partners (analytics, email delivery, payment processing) may process data in other jurisdictions under appropriate transfer mechanisms — EU/UK users are covered by Standard Contractual Clauses where applicable. Full detail in the Privacy Policy.

ISO 9001 and ISO/IEC 17025 answer two different questions. ISO 9001 asks whether an organization runs a controlled, documented quality-management system. ISO/IEC 17025 asks whether a testing laboratory is technically competent to produce valid results. Peptriva holds both.

The distinction matters when you read a certificate. A quality-management system governs records, change control and how deviations are handled. It says nothing about whether an HPLC result is correct. Laboratory competence covers method validation, equipment calibration, analyst training and measurement uncertainty. That is what makes a number defensible.

Neither standard is a result. A lot is only described by its own data. On the independent certificate issued per lot by an independent US laboratory, currently Freedom Diagnostics in Franklin TN, identity is run by LC-MS and reports Confirmed. Purity is HPLC-UV, area-percent, with real per-lot values from 99.58% to 99.91%. Net content is measured in mg and often sits above the label. Endotoxin uses the LAL assay in accordance with USP <85>, run in duplicate, with both replicates reporting Pass. Heavy metals are tested and reported within the purity panel.

Every lot is tested twice by third-party labs. Once when the lot is finished, and again when it reaches our cold-chain center. Release is enforced in code: a lot cannot move into sellable stock unless both the manufacturing-facility certificate and the independent certificate are on file.

All products are research use only, not for human or veterinary use.

A lot is one finished production run of one compound. Lot-level testing means the analysis is run on that lot, and the numbers on the certificate belong to that lot alone. Batch sampling is different. It tests a subset and treats the result as representative of everything around it. That is a statistical argument. Lot-level testing is a direct measurement.

The independent laboratory certificate reports identity, purity, net content and endotoxin for each lot, and heavy metals are reported within the purity panel. Identity by LC-MS, reported as Confirmed. Purity by HPLC-UV, in area-%. Real lots have come back between 99.58% and 99.91%. Net content, measured in mg. Endotoxin by LAL assay, in accordance with USP <85>, run in duplicate, with both replicates reporting Pass. Heavy metals are tested and reported within the purity panel.

Net content shows why this matters. BPC-157 lot BC10-260504 reported 11.24 mg against a 10 mg label. A sample from a different lot would not have told you that.

Every lot is tested twice by third-party labs. Once when the lot is finished, and again when it reaches our cold-chain center. Release is enforced in code. poReadyToSync() refuses to move a lot into sellable stock unless both the manufacturing facility certificate and the independent certificate are on file.

The limits are worth stating plainly. A certificate describes its own lot and nothing else. Microbial analysis by PCR appears on the bacteriostatic water certificate, and is not a per-lot peptide test. Everything is research use only, not for human or veterinary use.

Purity and net content answer different questions. Purity is a ratio. HPLC-UV area-% tells you what share of the material is the target peptide. It does not tell you how much material is there. A lot can pass purity and still be short of the label weight. Net content closes that gap. It is the measured mass, in milligrams, of what the vial holds.

That matters because you cannot check it yourself. Nothing about the vial shows its mass. Without a measured figure you are trusting a printed number. With one you are reading a result.

Peptriva's independent certificate prints net content in mg for every lot. Measured values frequently sit above the label. BPC-157 lot BC10-260504 reported 11.24 mg against a 10 mg label. Overfill of that kind is the direction you want the error to run.

One limit, stated plainly: net content is a per-lot measurement. It describes the lot, not the single vial in your hand. The certificate does not claim otherwise.

The release gate here is code, not policy. poReadyToSync() will not move a lot into sellable stock unless both the manufacturing facility certificate and the independent certificate are on file. The gate keys on the certificates themselves: without both certificates on file, the lot does not become sellable stock. Every product is research use only, not for human or veterinary use.

LC-MS answers one question: is this the molecule named on the label? HPLC-UV answers another: how much of what is in the vial is that molecule? Neither test substitutes for the other.

LC-MS separates the sample, then weighs its components by mass-to-charge ratio. A peptide has a known molecular mass. If the measured mass matches, identity is confirmed. The result is a word, not a percentage. The independent certificate prints identity as Confirmed.

HPLC-UV separates the sample on a column and detects each component by ultraviolet absorbance. The report is area-%: the main peak divided by the total peak area. Real per-lot values on our certificates run 99.58% to 99.91%. Heavy metals are tested and reported within the same purity panel.

Each test has a blind spot. Area-% only counts what the UV detector sees at that wavelength. Salts, water and residual solvents may absorb weakly or not at all, so area-% is not a mass fraction of the powder. That is why net content is measured separately, in mg per lot. Purity also says nothing about identity. A closely related peptide can run as a single clean peak and still be the wrong compound. LC-MS is what catches that.

Both tests appear on every lot certificate. Release is enforced in code: poReadyToSync() will not move a lot into sellable stock unless the manufacturing facility certificate and the independent laboratory certificate are both on file. Research use only. Not for human or veterinary use.

Heavy metals are screened because trace metals can enter a peptide at several points. Synthesis, purification, solvents, and storage contact all provide routes. The residue is usually small. It still matters in a research setting.

Metal ions are reactive. They can catalyze oxidation of sensitive residues such as methionine and cysteine, which changes the material over time. Some metals bind peptides directly and alter how they behave in an assay. In cell work, trace metal carryover can suppress viability and shift readouts. A result then gets blamed on the peptide when the contaminant caused it. Screening removes that ambiguity before the material reaches an experiment.

Peptriva tests heavy metals and reports them within the purity panel on the independent laboratory certificate. That certificate is issued per lot by an independent US laboratory, currently Freedom Diagnostics of Franklin, Tennessee. The same panel prints purity by HPLC-UV, with real per-lot values running from 99.58% to 99.91%. Identity is confirmed separately by LC-MS.

Two things are not on this page. We do not publish a numeric heavy-metals limit, and we do not name the instrument method used. Read the certificate for your own lot for what was actually measured.

Release is enforced in code, not policy. poReadyToSync() refuses to move a lot into sellable stock unless both the manufacturing facility certificate and the independent certificate are on file. Everything is research use only, not for human or veterinary use.

Endotoxin is lipopolysaccharide from the outer membrane of gram-negative bacteria. It is not a living organism. It is a molecule, and it is stable enough that it can outlast the bacteria that produced it and survive ordinary purification steps.

That is why a lab cares. Endotoxin is biologically active at extremely low concentrations. In cell culture it can activate immune-competent cells, shift cytokine readouts, and change proliferation results. A peptide that is chemically clean can still carry enough endotoxin to confound an assay, so a purity number alone does not answer the question.

The standard method is the Limulus amebocyte lysate assay, usually written LAL. USP <85> covers how the test is set up, controlled and interpreted. Peptriva's independent laboratory certificate reports LAL in accordance with USP <85>, run in duplicate, and both replicates report Pass. The certificate also prints an assay sensitivity of 0.05 EU/mL. That figure is the sensitivity of the assay itself. It is not a limit, not a specification and not the measured result for the lot.

Release is gated in code, not policy. A lot cannot move into sellable stock until both the manufacturing facility certificate and the independent certificate are on file.

Two limits worth stating plainly. An endotoxin pass says nothing about viable organisms; it is a test for a molecule, not a count of what is alive. And microbial analysis by PCR appears on our bacteriostatic water certificate only, not as a per-lot peptide test. Everything is research use only, not for human or veterinary use.

Ask which lot the document covers. A certificate with no lot number cannot be matched to the vial in your hand. Then ask who ran the test. In-house and independent certificates are different evidence. Ask for both.

Ask for the method on every line. Identity should be LC-MS. Purity should be HPLC-UV reported as area-%. A purity number with no method behind it means little. Ask for measured net content in mg, not the label weight. Measured content can sit above the label. One Peptriva lot reported 11.24 mg against a 10 mg label.

Ask how endotoxin was run. USP <85> covers the LAL assay. Peptriva's independent certificate runs it in duplicate, and both replicates report Pass. The certificate also prints an assay sensitivity of 0.05 EU/mL. That is what the assay can detect. It is not a limit and not a result. A supplier quoting it as a limit is misreading their own paperwork.

Ask what is not tested. Microbial PCR analysis appears on the bacteriostatic water certificate, not on each peptide lot. Ask which accreditation is held and what it means. ISO 9001 certifies a quality-management system. ISO/IEC 17025 concerns testing-laboratory competence. Peptriva holds both. Heavy metals are tested and reported within the purity panel.

Last, ask what stops an untested lot from shipping. At Peptriva that gate is code, not policy: poReadyToSync() refuses to move a lot into sellable stock unless both the manufacturing-facility certificate and the independent certificate are on file. All material is research use only, not for human or veterinary use.

A certificate of analysis covers one lot, not a product line. Four results carry the weight.

Identity is run by LC-MS and reports "Confirmed". Purity is HPLC-UV, reported as area-%. Recent lots print 99.58% to 99.91%. Area-% is relative. It tells you what share of detected material is the peptide, not an absolute mass. Heavy metals are tested and reported within that purity panel.

Net content is measured in mg for the lot, and it often lands above the label. BPC-157 lot BC10-260504 reported 11.24 mg against a 10 mg label. Endotoxin is the LAL assay in accordance with USP <85>, run in duplicate, and both replicates report "Pass". The certificate also prints an assay sensitivity of 0.05 EU/mL. That figure is the assay's detection sensitivity, not a limit, not a specification, and not a result.

Read what is missing too. Microbial analysis by PCR appears on the bacteriostatic water certificate. It is not a per-lot peptide test. A certificate describes the lot as tested, and nothing after that.

Peptriva files two certificates per lot. Every lot is tested twice by third-party labs. Once when the lot is finished, and again when it reaches our cold-chain center. The independent laboratory is currently Freedom Diagnostics, Franklin TN. Release is gated in code: poReadyToSync() refuses to move a lot into sellable stock unless both the manufacturing-facility certificate and the independent certificate are on file. Everything is research use only, not for human or veterinary use.

Check whether every result is a measurement. A real certificate prints a method, a lot number, a date, and a value you can check. A printed document just restates the label.

Read the identity line first. It should name a method. LC-MS is the usual one, and the result reads "Confirmed". Purity should name HPLC-UV and report area-%. Peptriva's per-lot certificates from an independent US laboratory run 99.58% to 99.91%.

Then check net content. A document that repeats the label size measured nothing. A real one reports the measured net content of the vial in mg. One BPC-157 lot, BC10-260504, reported 11.24 mg against a 10 mg label.

Endotoxin is where documents get vague. The certificate should name the assay and the standard. LAL in accordance with USP <85>, run in duplicate, both replicates "Pass". The certificate also prints an assay sensitivity of 0.05 EU/mL. That is what the assay can detect, not a limit and not a result. Treat any vendor quoting it as a specification with suspicion.

Ask what is not there. Heavy metals are tested and reported within the purity panel. Microbial analysis by PCR appears on the bacteriostatic water certificate, not on peptide lots.

Last, ask who checks. At Peptriva a lot cannot move into sellable stock until both the manufacturing facility certificate and the independent certificate are on file. That check is code, not policy. Every lot is tested twice by third-party labs. Once when the lot is finished, and again when it reaches our cold-chain center. Research use only, not for human or veterinary use.

The difference is who signs the result and who has something to lose. A self-reported claim is generated by the seller, or by the manufacturing facility that made the lot. It may be accurate, but nothing outside the seller confirms it. An independent third-party certificate comes from a laboratory that did not make the material and does not sell it.

For a scientist, the useful difference is method and traceability. It names the method, ties the result to a lot code, and reports a number rather than a claim. On Peptriva's independent certificate, identity is LC-MS and reads Confirmed. Purity is HPLC-UV, area-%, with real per-lot values between 99.58% and 99.91%. Net content is measured in mg, so it can disagree with the label. BPC-157 lot BC10-260504 reported 11.24 mg against a 10 mg label. Endotoxin runs by LAL assay in accordance with USP <85>, in duplicate, and both replicates report Pass. The certificate also prints an assay sensitivity of 0.05 EU/mL. That is the assay's detection sensitivity, not a limit and not a result. Heavy metals are tested and reported within the purity panel.

Peptriva enforces this in code. A release function, poReadyToSync(), refuses to move a lot into sellable stock unless both the manufacturing-facility certificate and the independent certificate are on file. Every lot is tested twice by third-party labs. Once when the lot is finished, and again when it reaches our cold-chain center.

A certificate covers the lot it names, not every vial. All material is research use only, not for human or veterinary use.

Verification is a matching exercise before it is a reading exercise. The order matters, because every result on a certificate is only meaningful once you know it describes the vial you are holding.

1. Find the lot code on the vial. It is printed on the label, and it is the only field that ties the glass to a document. 2. Open that lot's certificate. The QR code on the vial resolves to the results for that lot. The same certificate is retrievable by entering the lot code at /coa, and past orders stay retrievable by lot number. 3. Compare the lot codes. Character for character, on the certificate against the vial. 4. Read the four results. Identity reported as Confirmed by LC-MS, purity as an HPLC-UV area-%, net content as a measured mass in mg, and endotoxin by the LAL assay in accordance with USP <85>, run in duplicate and reported as Pass.

Three cases are worth naming, because they are the ones that decide whether you have evidence at all. A certificate carrying no lot code is not a certificate for your vial, and no amount of detail elsewhere on it changes that. A certificate whose lot code differs from the vial describes a different batch, and should be treated as the wrong document rather than a close-enough one. A lot code on the vial that is illegible leaves you unable to verify anything, so ask rather than assume — contact us with the order and we will identify the lot.

The reason this check is cheap here is structural. A lot cannot be moved into sellable stock until both of its certificates are on file, the manufacturing facility's and the independent laboratory's, and that is enforced in code rather than by policy. What the certificate reports, field by field, is covered in the FAQ.

This is a release gate rather than a policy, and the distinction matters: held stock is not marked as unavailable in inventory, it is kept outside sellable inventory entirely, on the purchase order it arrived against. There is no state in which it can be sold by mistake.

Four cases are covered, and only one of them releases stock. Manufacturing facility's certificate only, which is what arrives with the shipment, stays held. Independent certificate only, without the manufacturer's, is not sellable. A lot received with no certificate at all is not sellable. A lot code that is not recognised is not sellable. Both certificates present is the only combination that releases the lot into sellable inventory.

That behaviour is covered by unit tests rather than by a written procedure, which is what is meant elsewhere on this site by the gate being enforced in code. If you believe a vial you received does not match its certificate, contact us with the lot code and we will take it from there.

Two certificates exist per lot and they are separated by the shipping leg. The manufacturing facility tests the finished lot, and across the seven lots where both dates are on file that certificate is dated 8 to 16 days after the lot date. The independent laboratory re-tests the same lot when it arrives at the cold-chain center, and across the eleven lots with a readable lot date that certificate was reported 36 to 65 days after the lot date.

Read those as a description of what has happened, not a promise about what will. The release rule is not time-based at all: a lot becomes sellable when both certificates are on file, and a slow re-test delays the release rather than shortening the testing. Every certificate currently on file is listed at /coa with its lot code, so the interval on any specific lot is checkable rather than taken on trust.

What is published is the independent laboratory's certificate itself, as the laboratory issued it, not a summary of it. It carries the lot code, the accession number, identity, purity, net content and the endotoxin result, and it is the document the figures on this site are drawn from.

What is not published is the underlying instrument output. There are no chromatograms or spectra behind the certificate on this site, and the manufacturing facility's own certificate, while required before a lot can be released, is held on file rather than shown. If your work needs something beyond the published certificate, ask with the lot code rather than assuming either way.

Yes. The independent certificate for every lot is issued by an independent US laboratory, currently Freedom Diagnostics in Franklin, Tennessee. That certificate prints identity by LC-MS, purity by HPLC-UV, net content in mg, and an endotoxin result run in duplicate under USP <85>.

Every lot is tested twice by third-party labs. Once when the lot is finished, and again when it reaches our cold-chain center. A lot cannot enter sellable stock until both the manufacturing-facility certificate and the independent certificate are on file. That check is enforced in our code, not just in policy. Peptriva holds ISO/IEC 17025 and ISO 9001.

Two things we do not say. We do not publish where the manufacturing facility runs its own testing. And US testing is not a statement about where the material is made.

Research use only. Not for human or veterinary use.

Orders ship FedEx 2-Day with cold-chain handling. Shipping is free on every order to the continental US.

FedEx 2-Day shipments move under a FedEx tracking number, so the parcel is tracked in transit. We do not publish an order cut-off time, and we do not promise same-day dispatch. The two-day clock is FedEx's service clock. It starts when the carrier takes the parcel, not when you place the order. If a delivery window matters to you, plan around that.

Not confirmed: standing orders, recurring shipments, and lab account pricing. We have no published program for any of these. Do not assume one exists until Peptriva says so.

All products are research use only. Not for human or veterinary use.

Peptriva is a research-peptide supplier. What makes it different is enforced in code, not policy: a lot cannot enter sellable stock unless two certificates are on file, one from the manufacturing facility and one from an independent US laboratory.

Every lot is tested twice by third-party labs. Once when the lot is finished, and again when it reaches our cold-chain center. The independent certificate prints identity by LC-MS and purity by HPLC-UV, with real lot values between 99.58% and 99.91%. It also prints measured net content in mg and an endotoxin result by LAL under USP <85>, run in duplicate. Heavy metals are tested within the purity panel. Peptriva holds ISO 9001 and ISO/IEC 17025.

Every lot is held in cold-chain handling from the manufacturing facility through our cold-chain center. Everything is research use only, not for human or veterinary use.

Yes. Every lot is independently tested before it can be sold. Peptriva carries research-use-only peptides, and the live catalog page is the only accurate list of what is in stock.

Every lot is tested twice by third-party labs. Once when the lot is finished, and again when it reaches our cold-chain center. The independent laboratory, currently Freedom Diagnostics in Franklin, TN, confirms identity by LC-MS, measures purity by HPLC-UV, weighs net content in mg, and runs a USP <85> endotoxin assay in duplicate. Heavy metals are tested within the purity panel.

This is enforced in code, not policy. Our system refuses to move a lot into sellable stock unless both the manufacturing facility certificate and the independent certificate are on file. Everything is research use only, not for human or veterinary use.

Yes. Certificates are issued per lot, not per order, so the document for a past order is the certificate for the lot you received. Give us your order number or the lot number and we will send the certificates on file for that lot.

Those records persist. A lot cannot enter sellable stock at all until both the manufacturing-facility certificate and the independent laboratory certificate are on file, and that check is enforced in our system, not by policy. The independent certificate prints identity by LC-MS, purity by HPLC-UV area-%, measured net content in mg, and endotoxin by LAL assay in accordance with USP <85>.

All products are research use only. Not for human or veterinary use.