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Ascorbic Acid

CAS No.: 50-81-7
Product Name:  Ascorbic Acid
CAS#50-81-7
Spec: food grade
Package: 25kg/box, 15mt/20`FCL on pallets
Delivery time: in stock for prompt shipment.
Dangerous goods or not: Not
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Description
Spec of Ascorbic Acid food grade:
 
Items Specification Results
Characteristics White or almost white crystalline powder or
colorless crystals
White crystalline powder
Solubility Freely soluble in water, sparingly soluble in
Alcohol,insoluble in chloroform,ether and benzene
Complies
Identification Complies Complies
Melting point 189C~193℃ Clear
pH(5%, W/V) 2.1~2.6 2.36
pH(2%,W/V) 2.4~2.8 2.53
Clarity and color of solution Solution S is clear and not more intensely coloured than reference solution BY7 up to standard
Assay 99.0%-100.5% 99.5%
Specific Rotation +20.5-+21.5° +20.9°
Copper ≤5ppm 0.04ppm
Iron ≤2ppm 0.04ppm
Mercury ≤1ppm 0. 01ppm
Arsenic ≤3ppm <3 ppm
Lead ≤2ppm 0.02ppm
Impurity E(Oxalic acid) 0.2% <0.2%
Loss on drying ≤0.4% 0.02%
Sulphated ash(Residue on ignition) ≤0.1% 0.03%
Residual Solvents Methanol≤3000ppm 50ppm
Sieve Test(Pass Rate) 40 mesh 76.2%
  80 mesh 37.3%
  100 mesh 29.2%
Related Substances Impurity C:≤0.15% <0.006%
  Impurity D:≤0.15% <0.002%
  Unspecified Impurities:≤0.10% ND
  Total Impurities:0.2% ND

 

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