Verified
Precision.

Every compound US Precision Peptides releases is analytically tested by an ISO/IEC 17025:2017‑accredited lab. The certificate for every lot we have shipped is archived below.

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01

Purity
& Identity

HPLC + MS
≥99% typical

Compound identity and purity confirmed by reversed-phase HPLC with mass-spectrometric corroboration.

02

Endotoxins

USP <85>
< 1.0 EU/mg

Bacterial endotoxin load measured by LAL assay against the compendium specification.

03

Sterility

USP <71>
No growth

Verified sterility per the USP <71> compendium method; lots release only on a passing result.

04

Heavy Metals

ICP-MS
< ICH Q3D

Trace-metal content quantified by ICP-MS against the ICH Q3D Class 1 / 2A elemental impurity ceiling.

Vanguard Laboratory

Olympia · Washington · USA

ISO/IEC 17025:2017 accredited.

Independent. Third-party. Every lot tested before release.

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, sterility, and heavy-metal 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 is not yet listed, email docs@usprecisionpeptides.com with the lot number and we will reply with the matched certificate within one business day.