Nanjing Chemical Material Corp.
| ITEM | SPECIFICATION |
| Appearance | white or yellowish-white, hygroscopic powder |
| Solubility | complies with the CRS |
| Identification | |
| Infrared spectrum | corresponding to reference spectrum |
| Alkaline reaction | complies with the CRS |
| Appearance of solution | clear and not more intensely coloured than reference solution BY7 |
| Specific optical rotation | from +49.0 to +54.0 |
| 18α-glycyrrhizic acid | NMT 10.0% |
| Impurity A | NMT 5.0% |
| Any other impurity | NMT 2.0% |
| Sum or other impurities | NMT 7.0% |
| Heavy Metals | NMT 20ppm |
| Water | NMT 6.0% |
| Sulphated ash | NMT 0.2% |
| Residueethanol | NMT0.5% |
| Assay（MonoammoniumGlycyrrhizinate） | from 98.0% to 102.0% (anhydrous substance) |
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