Product Name: H- His-OH
CAS#: 71-00-1
Synonyms: L-Histidine
Molecular Formula:C6H9N3O2
Molecular Weight:155.16
Specifications:
Item
|
Standard
|
Analysis data
|
Appearance
|
White crystals or crystalline powder
|
White crystalline powder
|
Specific rotation[α]20/D
|
+12.0 to +12.8°
|
12.3°
|
State of solution
(Transmittance)
|
Clear and colorless not less than 98.0%
|
98.6%
|
Chloride (Cl)
|
Not more than 0.020%
|
0.016%
|
Ammonium (NH4)
|
Not more than 0.02%
|
<0.02%
|
Sulfate (SO4)
|
Not more than 0.020%
|
0.016%
|
Iron (Fe)
|
Not more than 10ppm
|
6ppm
|
Heavy metal
|
Not more than 20ppm
|
conform
|
Arsenic(As2O3)
|
Not more than 1ppm
|
<1ppm
|
Loss on drying
|
Not more than 0.20%
|
0.18%
|
Residue on ignition(sulfated)
|
Not more than 0.10%
|
0.08%
|
Assay
|
98.5% to 101.5%
|
99.1%
|
pH
|
7.0 to 8.5
|
7.6
|
Inspector:
|
陈君 王明芳
|
Manager:
|
彭秀明
|
Conclusion
|
The product is according with standard.
|
|