Letrozole Impurity 9 CAS 143030-54-0
Purity >95%In StockPharmacopoeial Impurity Standards
| CAS No. | 143030-54-0 |
| Molecular Formula | C16H11BrN4 |
| Molecular Weight | 339.19 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Letrozole Impurity 9 (CAS 143030-54-0) is a pharmacopoeial impurity standards certified reference material from CATO. Molecular formula: C16H11BrN4. Molecular weight: 339.19 g/mol. ISO 17034 accredited production ensures traceable purity and reliable analytical results.
Physical & Chemical Properties
| Molecular Formula | C16H11BrN4 |
| Molecular Weight | 339.19 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 13.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1997 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 4 |
Related Letrozole Standards
- Letrozole Impurity 20 (CAS CATO-C4X-182920)
- Letrozole Impurity 7 (CAS 1644566-39-1)
- Letrozole Impurity 8 (CAS 2170106-13-3)
- Letrozole EP Impurity B (CAS 113402-31-6)
- Letrozole Impurity 21 (CAS CATO-C4X-182921)
- Letrozole Impurity 12 (CAS CATO-C4X-182912)
- Letrozole Impurity 13 (CAS CATO-C4X-182913)
- Letrozole Impurity 10 (CAS CATO-C4X-182910)
Recommended Standards
- Trimethoprim EP Impurity F (CAS 16285-82-8)
- Brodimoprim (CAS 56518-41-3)
- Phenyl (4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)carbamate (CAS 756520-47-5)
- Ilaprazole Impurity 145 (CAS 67382-06-3)
- Progesterone Impurity 61 (CAS CATO-C4X-150261)
- ({2,4-dichloropyrrolo[2,1-f][1,2,4]triazin-7-yl}methyl)(methyl)amine (CAS 2092154-21-5)
- 1-(3,5-Difluorophenyl)-N-methylmethanamine (CAS 90390-28-6)
- 4-[(4-Bromophenyl)sulfanyl]-2-{[(3,4-dichlorophenyl)methyl]sulfanyl}-5-methoxypyrimidine (CAS 339276-02-7)
- 4-(2,6,6-Trimethyl-4-oxo-4,5,6,7-tetrahydro-1H-indol-1-yl)benzamide (CAS 497061-30-0)
- Semaglutide impurity 29 (CAS 1188328-22-4)
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