Ascorbic Acid

CAS number: 50-81-7

Molecular formula: C6H8O6

molecular weight: 176.1241

Chemical structure: 


Product name:     Ascorbic Acid
Shelf life 3 years
According to: BP2014/USP37/EP/FCC8/E300
Items Specifications Results
Appearance White or almost white,crystalline  powder or colourless crystals  A white crystalline powder
Melting point about 190℃,with decomposition 191℃
Infrared absorption spectrum infrared absorption spectrum accord with the reference spectrum of ascorbic acid CRS Meets the requirements
PH(with 5% water solution) 2.1-2.6 2.4
PH(with 2% water solution) 2.4-2.8 2.6
Appearance of solution Clarity:clear;Colour:≤BY7 Clarity:clear;Colour:<BY7
Specifi optical rotation +20.5°~ +21.5° +20.5°
Loss on drying ≤0.4% 0.05%
Impurity E ≤0.2% Meets the requirements
  Impurity C:≤0.15% Undetectable
  Impurity D:≤0.15% 0.03%
Related substance Unspecified impurities:≤0.10% Unspecified impurities:0.01%
  total inpurities:≤0.20% 0.04%
Copper ≤5.0ppm <5.0ppm
Iron ≤2.0ppm <2.0ppm
Arisenic ≤3.0ppm <3.0ppm
Lead ≤2.0ppm <2.0ppm
Mercuty ≤1.0ppm <1.0ppm
Cadmium ≤1.0ppm <1.0ppm
Heavy metals ≤10ppm Meets the requirements
Sulphated ash ≤0.1% 0.04%
Residual solvents Meets the requirements Meets the requirements
[Assay] 99.0%~100.5% 100.0%
Conclusion : The product conforms with the above analysis standard

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