Used as a vitamin in culture media and biotenylation of proteins and nucleic acids. Reagent Grade Appearance: White Crystalline Needles Density: 1.267 g/cm3 HS Code: 29362930 IUPAC_Name: 5-[(3aS,4S,6aR)-2-Oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl]pentanoic acid …