ASCORBIC ACID
ASCORBIC ACID
Analysis Contents | Analysis Standard | Analysis Results |
Characteristics | White or almost white crystals crystalline powder | Pass |
Identification | Positive reaction | Positive |
Melting point | About 190°C | 190.2°C |
PH | 2.4-2.8 | 2.41 |
Clarity of solution | Clear | Clear |
Colour of solution | ≤BY7 | ≤BY7 |
Copper | ≤5ppm | ≤5ppm |
Heavy metals | ≤10ppm | ≤10ppm |
Mercury | ≤0.1mg/kg | ≤0.1mg/kg |
Zinc | ≤0.25ppm | ≤0.25ppm |
Lead | ≤2mg/kg | ≤2mg/kg |
Arsenic | ≤3ppm | ≤3ppm |
Cadmium(Cd) | ≤1mg/kg | ≤1mg/kg |
Oxalic acid | ≤0.2% | 0.2% |
Iron | ≤2ppm | ≤2ppm |
Loss of Drying | ≤0.4% | ≤0.4% |
Residue On lgnition | ≤0.1% | ≤0.1% |
Specific rotation | +20.5°- +21.5° | +21.10° |
Mesh | 40-80 Mesh | Pass |
Origanic voltaic impurities | Pass | Pass |
Free of metal perticles | Containing or not containing | Not containing |
Assay | 99.0%-100.5% | 99.97% |
Conclusion : | The above-mentioned product conforms to BP2008/USP31 | |
ASCORBIC ACID
