Paclitaxel Impurity 38 CAS 173101-55-8
| CAS No. | 173101-55-8 |
| Molecular Formula | C45H55NO14 |
| Molecular Weight | 833.92 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO manufactures Paclitaxel Impurity 38 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.
CATO supplies Paclitaxel Impurity 38 (CAS 173101-55-8), a pharmacopoeial impurity reference standard (molecular formula C45H55NO14, MW 833.92 g/mol) used for the identification and quantification of trace impurities in APIs.
Structurally, Paclitaxel Impurity 38 (C45H55NO14) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 19.0, corresponding to approximately 19 ring(s) or double-bond equivalent(s). With a molecular weight of 833.92 g/mol, it falls into the high-molecular-weight range. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
Physical & Chemical Properties
| Molecular Formula | C45H55NO14 |
| Molecular Weight | 833.92 g/mol |
| Purity | >95% |
| Storage | Store at room temperature, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 19.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2006 |
| Nitrogen Atoms | 1 |
Related Paclitaxel Standards
- Paclitaxel EP Impurity R (CAS 158948-96-0)
- Paclitaxel Impurity R (CAS 159001-25-9)
- Paclitaxel Impurity 58 (CAS CATO-C4X-184258)
- Paclitaxel Impurity 61 (CAS CATO-C4X-184261)
- Paclitaxel Impurity 62 (CAS CATO-C4X-184262)
- Paclitaxel EP Impurity A (CAS 173101-54-7)
- Paclitaxel Impurity 18 (CAS CATO-C4X-184218)
- Paclitaxel EP Impurity B (CAS 71610-00-9)
Recommended Standards
- 2-Debenzoyl Paclitaxel 2-Pentanoate (CAS 213767-22-7)
- 213539-42-5 Benzenepropanoic acid, alpha-hydroxy-beta-((2-methyl-1-oxobutyl)amino)-, (2aR,4R,4aS,6R,9S,11S,12S,12aR,12bS)-6,12b-bis(acetyloxy)-12-(benzoyloxy)-2a,3,4,4a,5,6,9,10,11,12,12a,12b-dodecahydro-4,11-dihydroxy-4a,8,13,13-tetramethyl-5-oxo-7,11-methano-1H-cyclodeca(3,4)benz(1,2-b)oxet-9-yl ester, (alphaR,betaS)- Taxoline (CAS 213539-42-5)
- PDI-CC6C6-Br (CAS 259880-25-6)
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- 2-methyl-2-azabicyclo[2.2.2]octan-6-amine dihydrochloride (CAS 1909309-64-3)
- Insulin Degludec Impurity 7 (CAS CATO-C4X-21577)
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