Item Specification Result
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Description
Appearance White crystals or crystalline powder Corresponds
Odor and Taste Almost ordorless and taste sour Corresponds
Solubility Soluble in water
Identification
(1)Ninhydrin test Positive Positive
(2)Leas acetate test Positive Positive
(3)IR Spectrum Corresponds Corresponds
Optical Rotation -15.5 to -17.5 degree -17.0
Melting Points About 185 C 184.1 C
Purity test
(1)Solution Clear solution Corresponds
(2)Heavy Metals NMT 5ppm NMT 5ppm
(3)Arsenic NMT 1ppm NMT 1ppm
(4)Iron NMT 5ppm NMT 5ppm
Loss on drying NMT 0.5% 0.2%
Residue on Ignition NMT 0.1% 0.01%
Assay NLT 98.0% 98.8% |
