Molecular formula: C6H7NaO·H2O Molecular weight: 216.12 CAS NO.：6381-77-7
White to yellowish white crystal particles or crystal powder, odorless, slightly salty.
As food antioxidant and meat product preservative and coloring agent; as auxiliary material for medicine or sanitary products
| Item | Index |
| Assay % | 98.0-100.5 |
| dry weight loss % | ≤0.25 |
| Specific rotation（dry） | +95.5°-+98.0° |
| PH | 5.5-8.0 |
| Heavy metals（Pb）mg/kg | 10max |
| （As）mg/kg | ≤3.0 |
