White crystal or crystalline powder, pure and odorless. Generally, products have a smell of rice bran and a bitter taste. Soluble in water, ethanol, glycerol. The aqueous solution is more stable when heated at pH 2-4, and can generally absorb 4% quickly in the air.
Used as a nutritional fortifier in biscuits, milk powder, beverages and other foods.
| Item | Index | Item | Index |
| Content（dry）% | 98.5-101.5 | PH（25g/Lsolution） | 2.7-3.4 |
| Solution color | Passed test | Nitrate（20g/Lsolution） | Passed test |
| Dry weight loss W/% | ≤5.0 | Burning residue W/% | ≤0.1 |
| （Pb）mg/kg | ≤2 | （As）mg/kg | ≤2 |
