Description
Quality standard
(1) Sensory index
| Items | Requirements |
| Morphology | Powder, no clumping |
| Color | Light yellow or light brown powder |
| Odor | Inherent smell of the product, no other peculiar smell |
| Impurity | No visible impurity |
(2) Physicochemical index
| Items | Industrial grade | Pharmaceutical grade |
| Total nitrogen
(on DM) % |
≥14.0 | |
| Amino nitrogen
(on DM) % |
≥2.0 | ≥2.0 |
| Ash
(on DM) % |
≤7.0 | ≤7.0 |
| Loss on Drying (%) | ≤7.0 | ≤7.0 |
| PH (2% solution) | 5.0—7.0 | |
| Acid solution &
alkalescence high-pressure test |
__ |
|
| Solubility (2% solution) | Soluble | Complete |
