Letrozole EP Impurity B
Impurity reference standard · Letrozole
- CAS number
- 113402-31-6
- Molecular formula
- C22H13N3
- Molecular weight
- 319.36
- Purity
- 95%+
- Appearance
- White to off-white solid
- Storage
- 2℃ ~ 8℃
About Letrozole EP Impurity B
Letrozole EP Impurity B is a specified impurity of Letrozole. It is registered under CAS number 113402-31-6.
The compound is characterised by its molecular formula C22H13N3 and a molecular weight of 319.36, with the two-dimensional structure shown above. Because it shares the Letrozole scaffold, it is typically used to track process-related and degradation impurities of Letrozole during method development, forced degradation and stability studies.
Each pack ships with a certificate of analysis reporting purity of 95%+ together with the supporting analytical data — HNMR, MS and HPLC or GC traces — so the material can be released straight into your own QC workflow. Recommended storage: 2℃ ~ 8℃.
Available from stock in milligram to gram quantities; larger or custom synthesis requirements are quoted on request.
Other Letrozole impurities
The same parent compound, neighbouring impurity numbers.
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