Superiority:
Description Orange-red crystalline powder, hygroscopic
Lightly soluble in water or methanol, slightly soluble in ethanol, practically insoluble in acetone.
Identification A. The retention time of the major peak of the chromatogram obtained with the assay is identical with that of the reference chromatogram.
B. IR absorption spectrum should be consistent with that obtained with its CRS.
C. A white precipitate is formed when adding AgNO3 solution.
Crystallinity Meets the requirements
pH 4.5~6.5
Water NMT 3.0%
Residual solvents Methanol NMT 0.2%
Ethanol NMT 0.2%
Butanol NMT 1.0%
Chloroform NMT 0.006%
Dichloromethane NMT 0.06%
Acetone NMT 0.5%
Related substance Any other single impurity NMT 1.5%
Total impurities NMT 3.0%
Assay 84.0-102%
Details:
Description Orange-red crystalline powder, hygroscopic
Lightly soluble in water or methanol, slightly soluble in ethanol, practically insoluble in acetone.
Identification A. The retention time of the major peak of the chromatogram obtained with the assay is identical with that of the reference chromatogram.
B. IR absorption spectrum should be consistent with that obtained with its CRS.
C. A white precipitate is formed when adding AgNO3 solution.
Crystallinity Meets the requirements
pH 4.5~6.5
Water NMT 3.0%
Residual solvents Methanol NMT 0.2%
Ethanol NMT 0.2%
Butanol NMT 1.0%
Chloroform NMT 0.006%
Dichloromethane NMT 0.06%
Acetone NMT 0.5%
Related substance Any other single impurity NMT 1.5%
Total impurities NMT 3.0%
Assay 84.0-102%