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CIFICATIONS OF VITAMIN B2 (RIBOFLAVIN)
USP28/BP2000 |
ITEM |
USP28 |
BP2000 |
| Appearance |
A yellow or orange yellow crystalline powder |
A yellow or orange yellow crystalline powder |
Identification |
Conform |
Conform |
Specific rotation, ° |
+56.5 ~ +59.5 |
-115 ~ -135 |
Assay (on dried basis, %)
(on dried basis, %) |
98.0 ~ 102.0 |
98.0 ~ 101.0 |
Loss on drying (%) |
≤1.5 |
≤1.5 |
Residue on ignition (%) |
≤0.3 |
≤0.1 |
Organic volatile impurities |
Meets the requirements |
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Acidity or alkalinity(PH) |
/ |
Meets the requirements |
Lumiflavine |
440 nm
Absorbance≤0.025 |
Not more intensely coloured than reference solution BY6 |
| Absorbance |
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A373nm/A267nm=0.31~ 0.33
A444nm/A267nm=0.36~ 0.39 |
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Nutrients:
D-Glucosamine Sulphate 2KCl (NaCl)
