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Specification
| Items | Specifications |
| Appearance: | White crystals |
| Content: | 99.0 - 101.0% |
| Clarity and color of solution: | Colorless, clear |
| Water: | 13-15% |
| Melting point: | 226 - 230 °C |
| Arsenic: | 0.0002% max |
| Heavy metals: | 0.0010% max |
| Foreign substance: | 0.0010% max |
| Free acid and alkali: | Conforms |
| Benzoate and Salicylate: | Conforms |
| O-& P-Toluene Sufonamide | 0.0010% max |
| Readily carbonized substances: | Lower than standard |
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