抗坏血酸

Test ItemTest Standard BP2008/USP32/E300CHARACTER WHITE OR almost white crystalline powder IDENTIFICATION POSITIVE REACTION MELTING POINT(°C) ABOUT 190°C PH 2.1-2.6 CLARITY OF SOLUTION CLEAR COLOUR OF SOLUTION ≤BY7 COPPER ≤5PPM HEAVY METALS ≤10PPM MERCURY ≤0.1MG/KG LEAD ≤5PPM ARSENIC ≤3PPM CADMIUM(CD) ≤1MG/KG OXALIC ACID ≤0.2% IRON ≤2PPM LOSS ON DRYING ≤0.4% SULPHATE ASH(RESIDUE ON IGNITION) ≤0.1% SPECIFIC OPTICAL ROTATION +20.5°- +21.5° ORGANIC VOLATILE IMPURITIES PASS MESH 100 MESH ASSAY(%) 99.0%-100.5%