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L-Aspartic acid, Pharmpur®, Ph Eur, BP, USP

- Synonyms: L-a-Aminosuccinic acid
- C4H7NO4
- M = 133,10 g/mol
- CAS [56-84-8]
- EINECS-No.: 200-291-6
- Solub. in water: (20 ºC): 4 g/l
- Melting point: 269 - 271 ºC
- LD 50 (oral, rat): > 5110 mg/kg
- Tariff number: 2922 49 95 90
- Applications: for pharmaceutical use, synthesis of organic products, in food industry, in pharma industry.

SPECIFICATIONS
assay (acidimetric, on dried sample): 98,5 - 101,5 %
identity (IR-spectrum): passes test:
identification B (EP): passes test
Identification D (EP): passes test
Identification TLC: passes test
appearance of solution: passes test
specific rotation ([a]20/D, c = 8, HCl 250g/l on dried substance): + 24,0 º - + 26,0 °
chlorides (Cl): max. 200 ppm
sulfates (SO4): max. 300 ppm
ammonium (NH4): max. 0,02 %
iron (Fe): max. 10 ppm

malic acid: max. 0,20 %
fumaric acid: max. 0,10 %
maleic acid: max. 0,05 %
any unspecified impurities: max. 0,05 %
total unspecified impurities: max. 0,1 %
total: max. 0,3 %
ninhydrin-positive substances:
glutamic acid: max. 0,2 %
alanine: max. 0,2 %
asparagine: max. 0,2 %
any ninhydrin-positive substances: max. 0,10 %
total: max. 1,0 %
D-aspartic acid: max. 0,3 %
residue on ignition: max. 0,1 %
loss on drying (105 ºC, 3 h): max. 0,5 %