Description
Quality standard
(1) Sensory index
Items | Requirements |
Morphology | Powder, no clumping |
Color | Light yellow or milky white powder |
Impurity | No visible impurity |
(2) Physicochemical index
Items | Industrial grade | Pharmaceutical grade |
Total nitrogen
(on DM) % |
≥14.0 | ≥14.0 |
Amino nitrogen
(on DM ) % |
≥2.0 | ≥2.0 |
Ash
(on DM ) % |
≤6.0 | ≤6.0 |
Loss on Drying % | ≤7.0 | |
Sodium chloride
(on DM) |
__ | __ |
Nitrite | __ | |
PH (2% solution) | 5.0—7.0 | |
Acid solution &
alkalescency high-pressure test |
__ |
|
Solubility,(2% water) | Soluble | Complete |