|
Item
|
Specification
|
|
Appearance
|
White crystalline powder
|
|
Identification
|
Positive
|
|
Assay
|
98.5-102.0%
|
|
Solubility
10% solution 20% solution |
Clear and colorless Clear and colorless |
|
PH of 10% solution
|
3.7 ~ 4.1
|
|
Loss on drying
|
≤0.2%
|
|
Residue on ignition
|
<0.1%
|
|
Melting point
|
170 ~ 176℃
|
|
Heavy metals
|
≤10ppm
|
|
Arsenic
|
<1ppm
|
|
Iron
|
<2ppm
|
|
Copper
|
<2ppm
|
|
Chloride
|
<0.01%
|
|
Ammonium salts(NH4)
|
<200ppm
|
|
Sulphate(SO4)
|
<1ppm
|
|
Specific rotation
|
+18.0 ~ 20.0°
|
|
Nitrosoamines
|
<10ppm
|
|
Total Microbiological
|
<100KBE/g
|
|
Yeasts and molds
|
<10KBE/g
|