CAS number: 378-44-9
Molecular formula: C22H29FO5
molecular weight: 392.46100
Chemical structure:
Product Name | BETAMETHASONE BASE | |
Shelf life | 3 years | |
ITEM | SPECIFICATION | RESULT |
CHARACTER | WHITE OR ALMOST WHITE CRYSTALLINE POWDER | ALMOST WHITE CRYSTALLINE POWDER |
SPECIFIC ROTATION | +118° TO +126° | +123.6° |
IDENTIFICATION | (1)COMPLIES BY IR | CONFORMS |
(2)COMPLIES BY TLC | CONFORMS | |
CHROMATOGRAPHIC PURITY | PRINCIPAL IMPURITY NOT MORE THAN 1.0% | 0.34% |
TOTAL IMPURITIES NOT MORE THAN 2.0% | 0.43% | |
LOSS ON DRYING | NOT MORE THAN 0.5% | 0.09% |
RESIDUE ON IGNITION | NOT MORE THAN 0.2% | 0.07% |
PARTICLE SIZE (VOLUME METHOD) | IT SHOULD BE 90% BELOW 20μm | 7.19μm |
ASSAY | CONTAINS 97.0% TO 103.0% OF C22H29FO3 CALCULATED ON DRIED BASIS | 99.2% |
CONCLUSION | THE PRODUCT CONFORMS TO EP8.0 |