| ≥1 piece |
VB2 (Vitamin B2, Riboflavin)
1) Specification: BP, USP
2) CAS No.: 83-88-5
3) Function: Riboflavin, also known as vitamin B2, is an easily absorbed micronutrient with a key role in maintaining health in humans and animals. It is the central component of the cofactors FAD and FMN, and is therefore required by all flavoproteins. As such, vitamin B2 is required for a wide variety of cellular processes. Like the other B vitamins, it plays a key role in energy metabolism, and for the metabolism of fats, ketone bodies, carbohydrates, and proteins.
| Test Items | Specification | Test Results |
| Appearance |
Orange yellow crystalline power |
Complies |
| Identification |
Positive |
Complies |
| pH |
Check the color of the test solution after adding the respective solutions. |
Complies |
| Solubility |
Very slightly soluble in water, practically insoluble in alcohol. Solutions deteriorate on exposure to light, especially in the presence of alkali. |
Complies |
| Lumiflavin |
Absorbance of the filtrate at 440nm Max. 0.025(USP30); not more intense than BY6(BP) |
0.007 |
| Absorbance |
0.31~0.33 A375nm/A267nm 0.36~0.39 A444nm/A267nm |
0.32 0.38 |
| Particle Size |
100% pass 60mesh sieve |
Complies |
| Specific Rotation |
-115° ~-135° |
-122° (USP) -128° (BP) |
| Loss on Drying |
≤ 1.5% |
0.4% |
| Residue on Ignition |
≤ 0.3%(USP) ≤ 0.1%(BP) |
0.08% |
| Heavy Metals |
≤ 10ppm |
Complies |
| Organic Volatile Impurities |
Method IV < 467> (USP) |
Complies |
| Assay (on dried basis) |
98.0%~102.0% (USP) 97.0%~103.0% (BP) |
100.1% |
| Conclusion |
It meets the requirements of BP2008/USP31. |
|
| Storage |
Store in sealed containers at cool & dry place. Protect from light, moisture and pest infestation. |
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