Product Name | Ascorbic acid |
CAS No. | 50-81-7 |
Molecular Formula | C6H8O6 |
Molecular Weight | 176.12 |
Structural Formula | |
Quality Standard | BP2014/USP39/EP7/E300/FCC7 |
Packing | 25 kg/carton |
Shelf Life | 3 Years |
Items | Specification |
Characteristics | White or almost white,Crystalline powder or colourless crystals |
Identification | Corresponds |
Melting Point | 189°C ~ 193°C |
PH (5%,W/V) | 2.1-2.6 |
PH (2%,W/V) | 2.4-2.8 |
Specific Optical Rotation | +20.5° ~ +21.5° |
Apperance of Solution | Clarity: Clear; Colour: ≤BY7 |
Heavy Metals | ≤10ppm |
Copper | ≤5 ppm |
Iron | ≤2 ppm |
Mercury | <1 ppm |
Arsenic | ≤3 ppm |
Cadmium | <1 ppm |
Lead | <2 ppm |
Loss of Drying | ≤0.4% |
Sulphate Ash | ≤0.1% |
Oxalic Acid (Impurity E) | ≤0.2% |
Related substances | Impurity C: ≤0.15% Impurity D: ≤0.15% Unspecified impurities: ≤0.10% Total impurities: ≤0.20% |
Residual solvents | Meets the requirements |
Assay | 35.0% |