CAS No.: | 128-44-9 |
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Formula: | C7h4no3s, C7h4nnao3s |
EINECS: | 204-886-1 |
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Testing Item | Standard | Result |
Identification | Positive | Complies |
Melting point of | 2 2 6 -2 3 0°C | 227.1-229.5°C |
Appearance | White crystal | White crystal |
Content | 99.0-101.0 % | 99.62 % |
Loss on drying | ≤15 % | 13.89 % |
Ammonium Salts | ≤25ppm | 15ppm |
Arsenic | ≤2ppm | 0.1ppm |
Lead | ≤2ppm | 0.1ppm |
Benzoate and salicylate | No precipitate or violet color appears | Complies |
Heavy metals | ≤10ppm | 5ppm |
Free acid or alkali | Complies with BP/USP/EP | Complies |
Readily carbonizable substances | Not more intensely colored than reference | Complies |
P-Toluene sulfonamide | ≤10ppm | 5ppm |
O-Toluene sulfonamide | ≤10ppm | 5ppm |
Selenium | ≤30 ppm | 5ppm |
Related substance | Complies with BP/USP/EP | Without |
Clarity and color of solution. | Colorless, clear | Colorless, clear |
Organic volatiles | Complies with BP/USP/EP | Without |
PH value | Complies with BP/USP/EP | 6.5 |
Benzoic acid- sulfonamide | ≤25ppm | 15ppm |