Purity
& Identity
HPLC + MS
≥99% typical
Compound identity and purity confirmed by reversed-phase HPLC with mass-spectrometric corroboration.
Verified
Precision.
Our first production lots are in independent third-party testing now. No certificates have returned yet — so nothing is published below. We post each lot’s certificate the moment its results are back, and never before.
Our Testing Process
Purity
Endotoxins
USP <85>
< 1.0 EU/mg
Bacterial endotoxin load measured by LAL assay against the compendium specification.
Sterility
USP <71>
No growth
Verified sterility per the USP <71> compendium method; lots release only on a passing result.
Vanguard Laboratory
Olympia · Washington · USA
ISO/IEC 17025:2017 accredited.
Independent. Third-party. Every lot tested before release.
Testing in progress
Independent testing in progress
US Precision Peptides is built on independent, third-party laboratory verification. Our first production lots are in testing now, and no certificates have returned yet — so every item is currently sold without a Certificate of Analysis. We publish each lot's certificate the moment its independent results are back, and never before. That order — measure first, publish second — is the whole standard.
For the current status of a specific lot, email docs@usprecisionpeptides.com with the lot number printed on the vial.
No certificates match this filter.
What is a Certificate of Analysis?
A Certificate of Analysis (COA) is the third-party lab report that documents the composition and quality of a single lot of material. It identifies the compound, reports purity by HPLC, and records the results of endotoxin and sterility testing for that specific lot.
What does “lot-matched” mean?
Each vial we ship carries a lot number printed on its label. That lot number maps to one and only one COA. The certificate you read is the certificate for the lot you have, not a generic placeholder document.
How do I find the COA for the vial I have?
Search the library above by lot number (printed on the vial) or by SKU. If your lot’s certificate is not yet listed, its testing is still in progress — email docs@usprecisionpeptides.com with the lot number for current status. Certificates post here the moment results return.