Purity ≥96%. A1310 is used in cell culture systerms and for growth promotion of certain cell lines. pH (10%): 6.5-7.5 Loss on Drying: ≤5% Protein (Nitrogen Analysis): ≥96% Residue on Ignition: <3% Bioburden: <1000cfu/g Endotoxin: ≤0.5EU/mg Protease: None Detected