What a Certificate of Analysis Can and Cannot Prove
Understand the evidential value and limitations of a COA when qualifying research materials and reviewing supplier documentation.
What a COA can support
A well-formed COA can connect reported analytical results to a named sample and batch. It can show which tests were reported, the methods or references used, the units, specifications and result dates.
Together with supplier qualification and receiving records, it can support traceability and a documented procurement decision.
What it cannot establish alone
A COA cannot prove every untested attribute, guarantee future stability, replace correct storage or establish suitability for every experiment. It also cannot compensate for a missing batch link or an unclear laboratory report.
A purity percentage does not by itself establish identity, amount, sterility, endotoxin status or absence of all contaminants.
Review evidence as a package
Use the COA alongside the vial label, full analytical report where available, supplier history, transport and storage records, and the laboratory's own controls. Resolve inconsistencies rather than selecting only favourable values.
JGPep+ documentation is supplied for research-material review and never represents approval for administration to humans or animals.
Research use only. Not for human or veterinary use.