Letrozole Impurity 19
Impurity reference standard · Letrozole
- CAS number
- —
- Molecular formula
- C17H11N5
- Molecular weight
- 285.30
- Purity
- 95%+
- Appearance
- Pale Yellow Solid
- Storage
- 2-8°C
About Letrozole Impurity 19
Letrozole Impurity 19 is a specified impurity of Letrozole. It has no single publicly registered CAS number, so it is defined by the structure and molecular formula below.
The compound is characterised by its molecular formula C17H11N5 and a molecular weight of 285.30, 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°C.
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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