DL-Aspartic acid,CAS:617-45-8
Identification (IR spectrum): Agree with Ref. Standard
specific optical rotation: -0.5 – +0.5
appearance of solution: clear and not more intensely colored than BYB
Maleic acid: 0.1% max
Malic acid: 0.2% max
Fumaric acid: 0.1% max
Any unspecified impurity: 0.1% max
Total unspecified impurity: 0.3% max
Glutamic acid: 0.2% max
Alanine: 0.2% max
Aspargine: 0.2% max
Any ninhydrin-positive substance:0.1% max
Total ninhydrin-positive substance: 1.0% max
Chloride: 0.02% max
sulfate: 0.03% max
ammonium: 0.02% max
Iron: 0.001% max
loss on drying: 0.5% max
sulfated ash: 0.1% max
Assay: 98.5-101.5%
