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Item | Standard |
Appearance | White crystalline powder |
Identification | Positive |
Clarity of solution | Clear |
Assay (%) | 99.0~100.5 |
Loss on drying (%) | ≤ 0.40 |
Residue on ignition (%) | ≤ 0.10 |
Sulphate ash | ≤ 0.10 |
PH value (2% solution) | 2.4 ~ 2.8 |
Heavy metals | ≤3 ppm |
Total plate count | ≤ 1000 cfu/g |
Arsenic | ≤1 ppm |
Chloride (Cl) (%) | ≤ 0.30 |
Melting point ( ℃) | about 190 |
Cadmium | ≤1 ppm |
Mercury | ≤1 ppm |
Storage | in the shade |
Packing | 25kg/bag |