Verify your batch.
Full 14-point analysis.
Every OP Labs batch has its own Certificate of Analysis. Look yours up with the batch number on your vial, or view a sample COA with no account.
Not just tested – accountable.
Batch-specific
The certificate is for the exact lot printed on your vial – not a generic sample.
Named methods
Every result names the technique behind it.
Accountable
Not an anonymous reseller – issued by a UK-registered company.
COA library last updated · 12 July 2026
See a specimen certificate – representative analytical panel ▾
| Test parameter | Method | Spec. |
|---|---|---|
| Appearance | Visual | White to off-white powder |
| Peptide purity | RP-HPLC (C18) | ≥ 98.5% |
| Molecular weight | ESI-MS | 2986.5 ± 1.0 Da |
| Water content | Karl Fischer | ≤ 10.0% |
| Counter-ion (TFA) | RP-HPLC | < 0.50% |
| Total related substances | RP-HPLC | ≤ 2.0% |
| Test parameter | Method | Spec. |
|---|---|---|
| Largest single impurity | RP-HPLC | ≤ 1.0% |
| Residual solvent – ACN | GC-HS | ≤ 410 ppm |
| Residual solvent – DCM | GC-HS | ≤ 600 ppm |
| Residual solvent – DMF | GC-HS | ≤ 880 ppm |
| Bacterial endotoxins | LAL | < 5 EU/mg |
| Bioburden | USP <61> | < 100 CFU/g |
Illustrative only. Actual results are batch-specific and printed on each certificate, with their own test date.
What’s on every COA – the full panel ▾
Identity
Confirms the peptide matches its reference by retention time.
Molecular weight
Measured mass versus the theoretical value.
Appearance
Colour and physical form of the material.
Purity
Chromatographic purity as an area percentage.
Related substances
Total impurities and largest single impurity versus limits.
Counter-ion
Identifies and quantifies the salt counter-ion (e.g. acetate).
Water content
Residual moisture affecting stability.
Residual solvents
Manufacturing solvents by headspace GC.
Microbial safety
Endotoxins and bioburden versus limits.
Questions
Where is my batch number? ▾
Each vial is labelled with a batch (lot) number in the format OP-XXXXX. One batch number corresponds to one manufactured lot.
Why is email verification required? ▾
Batch documentation is released to customers of record. Verifying the email associated with your order confirms eligibility; the address is not displayed or shared.
What does the certificate report? ▾
Product identity (name, CAS number, PubChem CID), molecular formula and weight, appearance, HPLC purity, related substances, counter-ion content, water content, residual solvents and microbial safety – each result against its specification.
The batch number returns no result. ▾
Confirm the value against the vial label. If unresolved, contact Customer Support with your order reference and the certificate will be issued directly.