Ascorbic Acid

CAS number: 50-81-7

Molecular formula: C6H8O6

molecular weight: 176.1241

Chemical structure:

Product name:    Ascorbic Acid
Shelf life3 years
According to:BP2014/USP37/EP/FCC8/E300
ItemsSpecificationsResults
AppearanceWhite or almost white,crystalline  powder or colourless crystals A white crystalline powder
Melting point
about 190℃,with decomposition191℃
Infrared absorption spectruminfrared absorption spectrum accord with the reference spectrum of ascorbic acid CRSMeets the requirements
PH(with 5% water solution)2.1-2.62.4
PH(with 2% water solution)2.4-2.82.6
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 substanceUnspecified 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≤10ppmMeets the requirements
Sulphated ash≤0.1%0.04%
Residual solventsMeets the requirementsMeets the requirements
[Assay]99.0%~100.5%100.0%
Conclusion : The product conforms with the above analysis standard