Verification & Testing
Verify your peptide. Every batch. Every time.
Independent third-party verification of identity, purity, and quantity for every peptide we ship. Enter your batch ID below to view the certificate of analysis (COA) for your order.
Sample lookups: PV-43BE4D-JUHD-DF · PV-43BE4D-JUHD-B1Our testing process
Every production lot is released only after passing a defined panel of analytical tests. Testing is performed by ISO/IEC 17025-accredited third-party laboratories. The resulting certificates of analysis (COA) are issued under each batch's unique verification ID and are accessible through the lookup above.
HPLC — Purity
Reverse-phase high-performance liquid chromatography (RP-HPLC) at 214/220 nm to quantify chromatographic purity and detect related impurities.
Mass spectrometry — Identity
ESI-MS confirms the molecular weight of the active peptide against its theoretical monoisotopic mass to verify sequence identity.
Peptide content — Quantity
Net peptide content (the mass of peptide active per vial, excluding counter-ions, water and residual solvents) reported as % w/w of total fill.
Appearance & solubility
Visual inspection of the lyophilised solid (colour, form, occlusions) and reconstitution check in bacteriostatic water for clarity and absence of particulates.
Residual solvents
GC headspace screening for residual TFA, ACN and other process solvents against ICH Q3C class limits.
Endotoxin (LAL)
Limulus amebocyte lysate test on representative lots intended for parenteral research applications, reported in EU/mg.
Release specification
| Attribute | Method | Specification |
|---|---|---|
| Identity | ESI-MS | Observed [M+H]+ matches theoretical ± 0.5 Da |
| Chromatographic purity | RP-HPLC, 214 nm | ≥ 99.0% area |
| Net peptide content | UV / N% / HPLC | Reported on COA, ≥ 75% w/w typical |
| Appearance | Visual | White to off-white lyophilised cake; clear solution on reconstitution |
| Residual solvents | GC-HS | Within ICH Q3C limits |
| Bacterial endotoxins | LAL (kinetic chromogenic) | Reported on COA where applicable |
Independent laboratories & quality framework
Analytical testing is contracted to independent laboratories operating under ISO/IEC 17025 accreditation. Manufacturing is performed in facilities aligned with ICH Q7 / WHO GMP guidance for active pharmaceutical ingredients used in research. No analytical work is performed in-house, and no result is reported by the manufacturer alone.
ISO/IEC 17025
All chromatographic and spectrometric assays are performed by laboratories whose scope includes peptide identity and purity determination.
GMP-aligned manufacturing
Synthesis is conducted under documented batch records, deviation control, and release-by-QA workflows aligned with ICH Q7.
Chain of custody
Each retained sample is sealed and logged against its batch ID at release. The same ID is printed on the vial label and on your packing slip.
Tamper-evident labelling
Vials are sealed with tamper-evident closures. The verification QR code on the carton resolves to the same batch URL as the lookup above.
How to read a COA: The certificate displays the test method, the acceptance criterion, the observed result, and a pass/fail outcome for each attribute. Sequence identity is shown as an annotated mass spectrum; purity is shown as the integrated HPLC chromatogram. The certificate is digitally signed by the issuing laboratory and dated.
Frequently asked questions
What is a Certificate of Analysis (COA)?
A COA is the analytical release document for a specific manufacturing lot. It states which tests were performed, the methods used, the acceptance criteria, and the actual results obtained. A COA is lot-specific — it applies only to the batch identified at the top of the document.
How is a batch ID linked to my order?
Every vial we dispatch carries a printed batch ID in the format PV-XXXXXX-XXXX-XX. The same ID appears on the carton QR code and on your packing slip. Entering it on the lookup above retrieves the third-party COA issued for that exact lot.
What does ≥ 99% purity actually mean?
It refers to chromatographic purity by RP-HPLC at 214 nm, expressed as the integrated peak area of the target peptide divided by the total integrated area of all UV-active species in the chromatogram. It is distinct from net peptide content, which describes the mass of peptide active per vial.
Why are purity and content reported separately?
A peptide can be 99% chromatographically pure while a vial contains 78% peptide by mass — the remainder being water, counter-ions (typically TFA or acetate) and residual solvents. Reporting both values prevents the common conflation of HPLC purity with mass-based dosing.
Are the laboratories truly independent?
Yes. Testing is contracted to ISO/IEC 17025-accredited laboratories that have no commercial interest in the release outcome. Lab identity, accreditation reference and test date are stated on each COA.
What if a batch fails a specification?
Out-of-specification (OOS) lots are quarantined and are not released for sale. Investigations follow a documented OOS procedure; failed lots are either reworked under defined criteria or destroyed and recorded against the batch number.
Can I see a sample report before purchase?
Yes — the sample lookups in the hero above resolve to live verification records. Each product page also links to the third-party COA issued for that exact lot.
Verification at a glance
100%
of batches third-party tested before release
ISO 17025
accredited analytical laboratories
≥ 99%
HPLC purity release specification
1 ID
per lot — vial, carton and COA