COA & Purity Science

ISO 17025 accreditation scope, not accreditation status, determines whether the purity figure on a peptide certificate was produced under accredited

A peptide retest period printed on a certificate of analysis is a derived claim rather than a measurement. ICH Q1E

A peptide blend COA cannot be reduced to a single purity percentage, because a vial holding two declared peptides has

Mean kinetic temperature is the single calculated temperature that reproduces the cumulative chemical damage a fluctuating temperature history would cause,

Peptide cross-contamination is the presence of a second, unrelated peptide carried into a batch from shared synthesis, purification or filling

COA authenticity verification is the step almost no research peptide buyer performs, and it is the only step that distinguishes

Why a peptide certificate of analysis is a conclusion rather than evidence, what ALCOA+ requires of the underlying records, and what published analyses of unregulated peptide products reveal about identity errors that purity measurement cannot detect.

Peptide nitrosamine impurities are a class of mutagenic contaminants formed when a secondary amine in a peptide reacts with nitrite

An out-of-specification result is any analytical value that falls outside the acceptance criteria established for that material, and it cannot

A certificate of analysis reports what was measured in a sample drawn from a batch, not what is inside the