1. Specification:
Items standard
Description: White or almost white Crystals crystalline po Identification: Positive reaction Melting point: 187 - 192 centigrade thermometer Ph: 2.1-2.6 Clarity of solution: Clear Colour of solution: ≤by7 Copper: ≤5 ppm Heavy metals: ≤10 ppm Iron: ≤2 ppm Mercury: ≤1 ppm Lead: ≤2 ppm Arsenic: ≤3 ppm Oxalic acid: ≤0.2% Loss on drying: ≤0.4% Residue on ignition: ≤0.1% Specific rotation: +20.5 to +21.5 degree Organic volatile impurities: Pass Assay: 99.0% - 100.5% Product confirm to bp2004/usp28
2. Shelf life: 3 years