Riboflavin (vitamin B2) Product Name: Riboflavin (Vitamin B2) CAS: 83-88-5 Molecular formula: C17H20N4O6 Molecular weight: 376.36 Melting point: 290 degrees C Specific optical rotation: -135(c=5,0.05 M NaOH) Boiling point: 504.93 degrees C (rough estimate) Density: 1.2112 (rough estimate) Refractive index: - 135 degrees (C = 0.5, JP Method) Storage Conditions: 2-8 degrees C Character: Light yellow powder Packaging: 25kg/barrel