L-Histidine, Pharmpur®, Ph Eur, BP, USP

- Synonyms: L-3-Imidazol-4-alanine
- C6H9N3O2
- M = 155,16 g/mol
- CAS [71-00-1]
- EINECS-No.: 200-745-3
- Solub. in water: (20 ºC): 38,2 g/l
- Melting point: 272 - 273 ºC (decomposes)
- LD 50 (oral, rat): > 5110 mg/kg
- Tariff number: 2933 29 90 90
- Applications: in biochemistry, for pharmaceutical use, in food industry, in pharma industry.

SPECIFICATIONS
assay EP (acidimetric) : 98,5 - 101,0
assay USP (acidimetric, on dried sample): 98,5 - 101,5
Identification IR: passes test
Identification TLC: passes test
Identification D (EP): passes test
appearance of solution: passes test
specific rotation (EP; 25ºC/D) (dried substance) : + 11,4º to + 12,4º
specific rotation (USP; 25ºC/D) : + 12,6º to + 14,0º
pH : 7,0 - 8,5: :
ammonium (NH4): passes test
chlorides (Cl): max. 200 ppm
iron (Fe): max. 10 ppm
sulfates (SO4): max. 300 ppm

individual impurity : max. 0,5 %
total impurities: max. 2,0 %
ninhydrin-positive substances:
each : max. 0,2 %
total : max. 0,5 %
loss on drying (105 ºC): max. 0,2 %
residue on ignition: max. 0,1 %