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Specifications
Name: Letrozole
CAS:112809-51-5
Specification:EP/USP
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Specifications:
English name:Letrozole
Another name:Femara
Specification: 99%
CAS NO.: 112809-51-5
Appearance:white to off-whitecrystalline powder
Molecular weight:285.31
Molecular formula:C17H11N5
Melting point: 100-102 °C
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Contents of testing
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Specifications
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Results
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Appearance
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White or yellowish crystalline powder
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Comply
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Identification
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IR
HPLC
UV
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Comply with standard IR
Comply
Comply
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Water by KF
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0.3% max
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0.17%
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Residue on ignition
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0.1% max
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0.06%
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Heavy metal
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0.001% max
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Comply
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Related Substances
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Related Substances A
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0.3% max
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0.05%
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Any other impurities
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0.1% max
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0.04%
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All other impurities
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0.3% max
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0.15%
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Organic volatile impurities
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Conform with ICH requirements
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Residual solvents
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Conform with ICH requirements
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Assay
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98.0%-102.0%
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99.65%
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Residual solvents
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0.2% max
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0.1%
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Storage
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Cool and dry
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Conclusion:
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Conform with USP35
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