Customization: | Available |
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CAS No.: | 50-81-7 |
Formula: | C6h8o6 |
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Items | Standards |
Characteristics | White or almost white, crystalline powder or colorless crystals |
Melting point | 189ºC~193ºC |
Special optical rotation | 20.5º~+21.5º |
Apperance of solution | Solution S is clear and not more intensely cloured than reference solution BY7 |
Heavy metals | ≤10ppm |
Iron | 10ppm |
Assay | 99.0%~100.5% |
Copper | ≤5ppm |
Iron | ≤2ppm |
Mercury | ≤1ppm |
Arsenic | ≤3ppm |
Lead | ≤2ppm |
Oxalic acid(impurity E) | ≤0.2% |
Loss on drying | ≤0.4% |
Sulphated ash | ≤0.1% |
PH(2%,W/V) | 2.4~2.8 |
Methanol | ≤3000ppm |
TAMC | ≤1000cfu/g |
TYMC | ≤100cfu/g |
E. Coli | Absence |