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DESCRIPTION | YELLOW CRYSTALLIN POWDER | COMPIIES |
IDENTIFICATION: | ACCORDING TO BP2001 | COMPIIES |
PH VALUE | 2.3 ~ 2.9 | 2.50 |
SPECIFIC OPTICAL ROTATION | -188°~-200° | -188° |
ABSORBANCE (353nm, PH2.0) | 270 ~290 | 275.0 |
LIGHT ABSORBING IMPURITY | ABSORBANCE AT 430nm, <0.50 | 0.32 |
ABSORBANCE AT 490nm, <0.20 | 0.11 | |
RELATED SUBSTANCES | CONTENT OF IMPURITY PEAK MEET THE REQUIREMENTS | COMPLIES |
HEAVY METALS | ≤50 A(0.2%, 1CM, 430NM)<0.50 | 0.28 |
SULPHATED ASH | ≤0.5% | 0.08% |
WATER | ≤2.0% | 1.3% |
HPLC ASSAY | 95.0%~102.0% ANHYDROUS SUBSTANCE | 96.2% |