Letrozole Impurity 13 CAS CATO-C4X-182913
| CAS No. | CATO-C4X-182913 |
| Molecular Formula | C17H11N5O2 |
| Molecular Weight | 317.30 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
CATO supplies Letrozole Impurity 13 (CAS CATO-C4X-182913), a pharmacopoeial impurity reference standard (molecular formula C17H11N5O2, MW 317.30 g/mol) used for the identification and quantification of trace impurities in APIs.
Owing to a steroid core, an amide group, a hydroxyl group, an ether linkage, Letrozole Impurity 13 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 317.30 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
CATO manufactures Letrozole Impurity 13 under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C17H11N5O2 |
| Molecular Weight | 317.30 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 15.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 5 |
Related Letrozole Standards
- Letrozole Impurity 12 (CAS CATO-C4X-182912)
- Letrozole Impurity 21 (CAS CATO-C4X-182921)
- Letrozole EP Impurity B (CAS 113402-31-6)
- Letrozole Impurity 8 (CAS 2170106-13-3)
- Letrozole Impurity 7 (CAS 1644566-39-1)
- Letrozole Impurity 10 (CAS CATO-C4X-182910)
- Letrozole Impurity 31 (CAS CATO-C4X-182931)
- Letrozole Impurity 3 (CAS CATO-C4X-18293)
Recommended Standards
- Morinidazole Impurity 40 (CAS CATO-C4X-219640)
- Entacapone EP Impurity H (CAS 1150310-15-8)
- Gadoteridol Impurity 13 (CAS 192329-72-9)
- Entacapone Impurity 56 (CAS CATO-C4X-162956)
- Riboflavin Impurity 25 (CAS CATO-C4X-181925)
- Amikacin impurity 28 (CAS 197909-66-3)
- Mivacurium chloride Impurity 64 (CAS CATO-C4X-137564)
- 4-Methyl-N-((1-methyl-5-nitro-1H-imidazol-2-yl)methylene)aniline (CAS 129661-57-0)
- Methyl 2-methylbenzofuran-7-carboxylate (CAS 92810-80-5)
- Besudil Impurity 1 (CAS CATO-C4X-29881)
- tert-butyl 4-(hydroxymethyl)-2,2,5-trimethyl-1,3-oxazolidine-3-carboxylate (CAS 1087798-47-7)
- 7-(3-Aminopyrrolidin-1-yl)-6-fluoro-1-(2-fluoroethyl)-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylic acid (CAS 84424-24-8)
- Phenylpropiolic Acid (CAS 637-44-5)
- Proinsulin C-Peptide (55-89) (human) (CAS 11097-48-6)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com