Peptide raw material glossary
Short, self-contained definitions written for formulators and sourcing teams. Every term links to a dedicated page with the full definition.
chemistry
- Counterion — A counterion is the charged species that pairs with a peptide to form a neutral salt.
- TFA salt vs acetate salt — TFA salt and acetate salt are peptide salt forms containing different counterions.
analysis
- Peptide content vs purity — Peptide content and purity are different measurements.
manufacturing
- Lyophilization — Lyophilization is freeze-drying: water is removed from a frozen peptide solution under vacuum to produce a dry powder or cake.
- SPPS — SPPS (solid-phase peptide synthesis) is a manufacturing approach in which amino acids are assembled step by step on a resin support before cleavage and purification.
quality
- Certificate of Analysis (COA) — A certificate of analysis (COA) is a batch-specific document that records test results and methods for one production lot, normally against stated acceptance criteria.
- HPLC purity — HPLC purity is a chromatographic measure obtained by high-performance liquid chromatography under a stated method.
regulatory
- INCI name — An INCI name is a standardized ingredient name used in cosmetic ingredient labeling under the International Nomenclature of Cosmetic Ingredients system.
commerce
- MOQ — MOQ (minimum order quantity) is the smallest quantity a supplier accepts for a defined order.
- Custom peptide synthesis — Custom peptide synthesis is a contract service in which a peptide is produced according to an agreed sequence, modification set, quantity and specification.