CAS number： 83-88-5
Molecular formula： C17H20N4O6
molecular weight： 376.3639
Chemical structure：
| Product Name | Vitamin B2 (Riboflavin) | |
| Shelf Life | 3 years | |
| Test | Specification | Results |
| Appearance | A yellow or orange yellow crystalline powder | Yellow crystalline powder |
| Identification | A solution of 1 mg in 100ml of water is pale greenish yellow by transmitted light, and has an intense yellowish-green fluorescence that disappears upon the addition of mineral acids or alkalies | Conform |
| Specific rotation, ° | -115~-135 | -122 |
| Loss on drying, % | ≤1.5 | 0.10 |
| Residue on ignition, % | ≤0.3 | 0.1 |
| Lumiflavin | 440nm Absorbance≤0.025 | 0.008 |
| Assay (on dried basis)% | 98.0~102.0 | 99.1 |
| Conclusion: The above analytical results conform to USP37. | ||
