L-Histidine hydrochloride

Name : L-Histidine hydrochloride
Molecular Formula:C6H9N3O2.HCl
Molecular Weight:191.62
CAS Registry Number:1007-42-7
EINECS:13-754-2 

Specification
Product name
 L-Histidine Monohydrochloride
 
Item
 Specification
 
Appearance
 White crystals or crystalline powder
 
Specific Rotation [a]D20°
 +8.9°to +9.5°
 
State of Solution
 98.0% Min
 
Chloride (Cl)
 16.66% to 17.08%
 
Ammonium (NH4)
 0.02% Max
 
Sulfate (SO4)
 0.020% Max
 
Iron (Fe)
 10ppm Max
 
Heavy Metals (Pb)
 10ppm Max
 
Arsenic (As2O3)
 1ppm Max
 
Other Amino Acids
 Conforms
 
Loss on Drying
 0.20% Max
 
Residue on Ignition
 0.10% Max
 
pH
 3.5 to 4.5
 
Assay
 99.0% to 101.0%