Caspofungin Acetate 99% CAS:179463-17-3
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Item | Specifications | Result |
Appearance | White or almost white powder | Off white powder |
Indentification
| HPLC:The retention time of principle peak obtained from Test solution should conform with that obtained from Standard solution, as test in Assay | Conforms |
| IR: Spectrum of Test sample should conform to that of Caspofungin Acetate Reference Standard | Conforms |
Specific Optical Rotation | -102.0°~108.0 ° | -105.3° |
PH | 5.0~7.0 | 6.5 |
Water | 10.0% | 7.5% |
Solution color and clarity | Solution should be clear colorless | Conforms |
Related substances I | Impurity A: NMT 0.10% | ND |
| Impurity B: NMT 0.10% | ND |
| Impurity D: NMT 0.30% | 0.17% |
| Impurity E: NMT 0.10% | ND |
| Unspecified impurity F: NMT 0.10% | 0.03% |
| Unspecified impurity G: NMT 0.10% | ND |
| Pneumocandin B0: NMT 0.10% | ND |
| Each of unspecified impurity : NMT 0.10% | 0.04% |
| Total impurity: NMT 1.0% | 0.24% |
Related substances II | Impurity C: NMT 0.10% | 0.03% |
Acetic acid | 9.0%~11.0%(calculated on anhydrous basis) | 10.1% |
Heavy Metal as Pb | NMT 10ppm | Conforms |
Caspofungin acetate is a semi-synthetic analogue of pneumocandin B0 with improved water solubility, a significant limitation in the development of the echinocandin class as pharmaceuticals. Caspofungin acts by inhibition of the synthesis of β (1,3)-D-glucan, an essential component of the cell wall of susceptible fungi.
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