vitamin powder

Vitamin b2 HS CODE: 29362300 CHARACTERISTICS :Yellow or orange yellow crystalline powder; smells slightly bitter; Slightly dissolves in water, not dissolve in ether, alcohol and chloroform, with the melting point of 281--290°C. TESTSPECIFICATIONRESULTAPPEARANCE Yellow to orange-yellow, crystalline powderConformsIDENTIFICATIONAIt complies with the test for specific optical rotation ConformsBExamine the chromatogram obtained in the test for lumiflavin，the principal spot in the chromatogram obtained with test solution is similar in position and size to the principal spot in the chromatogram obtained with reference solution ConformsCA solution in water at a concentration of 1mg/100ml(w/v) appears pale greenish yellow by transmitted light,and has an intense yellowish-green fluorescence which disappears upon the addition of mineral acids or alkalies ConformsSPECIFIC ROTATION-115° -135°-120°ABSORBANCEThe solution shows 4 maxima, at 223 nm, 267 nm, 373 nm and 444 nm. The ratio of the absorbance at the maximum at 373 nm to that at the maximum at 267 nm is 0.31 to 0.33, and the ratio of the absorbance at the maximum at 444 nm to that at the maximum at 267 nm is 0.36 to 0.39. ConformsLIMIT OF LUMIFLAVINMeets the requirementsConformsLOSS ON DRYING≤1.5%0.21%SULPHATED ASH≤0.1%（BP）≤0.3%（USP）0.03%ORGANIC VOLATILE IMPURITIESMeets the requirementsConformsASSAY（By C17H20N4O6,calculated on dried basis）97.0～103.0%（BP）98.0～102.0%（USP）99.90%CONCLUSIONConforms to the standard of BP2007&USP30