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Physical properties
Melting point 129-131.5 °C(lit.)
alpha -16.5 º (c=10, H2O, on dry sub)
refractive index -16.5 ° (C=2, H2O)
solubility H2O: 0.1 g/mL, clear, colorlessSpecification
Appearance White crystalline powder
Melting point,℃ About 128Appearance of solution The solution is clear and its absorbance at 420nm is maximum 0.03
Specific optical rotation -16.0°-- -17.0°（Dried substance）
Reducing substances,% NMT 0.2
Chloride,ppm NMT 100
Sulphates,ppm NMT 150
Iron.ppm NMT 10
Heavy metal,ppm NMT 10
Loss on drying,% NMT 0.5
Sulphated ash, NMT 0.1
Bacterial endotoxins Less than 1.5IU/G
Assay,% 99.0-101.0Application
(1) Used as excipient in cosmetics and X-ray contrast media
(2) Used as phamaceutical IntermediatesPacking
25kg/drum
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