Description
Quality standard
(1) Sensory index
Items | Requirements |
Morphology | Powder, no clumping |
Color | Milky white to pale yellow powder |
Odor | Inherent smell of the product, no other peculiar smell |
Impurity | No visible impurity |
(2) Physicochemical index
Items | Industrial grade | Pharmaceutic grade |
Total nitrogen
(on DM) % |
≥12.0 | ≥12.0 |
Amino nitrogen
(on DM) % |
≥3.0 | ≥3.0 |
Ash
(on DM) % |
≤12.0 | ≤12.0 |
Loss on Drying % | ≤7.0 | ≤7.0 |
Sodium chloride
(on DM) |
__
|
|
Tryptophan | __ | |
Nitrite | __ | |
PH (2% solution) | 5.0—7.0 | |
Acid solution &
alkalescence high-pressure test |
__ |
|
Solubility,(2% water) | Soluble | Complete |