Understanding peptide purity

A chromatographic purity figure describes how much of the material, as measured by HPLC, is the target peptide versus other detected peaks.

Purity is distinct from net peptide content, which accounts for non-peptide mass such as water and counter-ions; both can appear on documentation.

Higher reported purity means fewer detected impurities, which is one reason researchers review the COA before beginning work.

Purity figures are analytical measurements for laboratory reference and are not a statement about safety or suitability for any use in humans or animals.