SPECIFICATION
| Appearance | White or almost white, crystalline powder or colourless crystals |
| Appearance of solution | Clear and colorless |
| Acidity or alkalinity | Passes the test |
| Related substances： | |
| 5-chloro-6-methyl-1,2,3-oxathiazin-4(3H)-one 2,2-dioxide | ≤20ppm |
| Any unspecified impurity | ≤0.1% |
| Total impurities | ≤0.1% |
| Fluorides | ≤3ppm |
| Loss on drying | ≤1.0% |
| Lead | ≤1ppm |
| Heavy metals | ≤5ppm |
| Assay | 99.0-101.0% |
MOLECULAR STRUCTURE：
Molecular Formula: C4H4KNO4S
