抗坏血酸

Full Specification: Analysis ContentsAnalysis StandardAnalysis Result Identification Positive Reaction Positive reaction Assay 99.0-100.5% 99.90% Melting Point190’C – 192’C 191.1’C PH2.1-2.62.40 Clarity of solution Clear clear Color of solution ≤BY7 <BY7 Copper ≤5ppm <5ppm Heavy metal ≤10ppm <5ppm Mercury ≤1ppm <1ppm Lead ≤2ppm <2ppm Arsenic ≤3ppm <3ppm Oxalic Acid ≤0.2% <0.2% Loss on drying ≤0.4% <0.4% Residue on ignition ≤0.1% <0.1% Specific optical rotation +20.5’C - +21.5’ +21.1’ Organic volataile impurities Pass pass Conclusion: The above-mentioned product conforms to BP2005/USP30.