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  • Shanghai Fine Chemicals Co.,Ltd
  • Shanghai Fine Chemicals Co.,Ltd
  • Shanghai Fine Chemicals Co.,Ltd
  • Shanghai Fine Chemicals Co.,Ltd
  • Shanghai Fine Chemicals Co.,Ltd
  • Shanghai Fine Chemicals Co.,Ltd
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Vitamin B2
 

Items of Test

      Limits of Test

1.Appearance

Orange yellow crystalline powder

2.Identification

Positive

3.Acidity or Alkalinity

check the color of the test solution after adding the respective solutions

4.Lumiflavin

Absorbance of the filtrate at 440nm

does not exceed 0.025 (USP);not more intense than BY6(BP)

5.Absorbance

0.31-0.33  A373nm/A267nm

0.36-0.39  A444nm/A267nm

6.Particla Size

100% passes through 60 mesh sieve

7.Specific Rotation

between-115º and -135º

(BP/USP)

8.Loss on Drying

≤1.5%

9.Heavy Metals

<10ppm

10.Residue on Ignition

≤0.3% (USP)

≤0.1%(BP)

11.Organic Volatile

Impurities

Method IV <467>

(USP)

12.Assay(ondried basis)

98.0%-102.0% (USP)

97.0%-103.0% (BP)

 
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