Olopatadine Impurity 9 CAS 113835-92-0
| CAS No. | 113835-92-0 |
| Molecular Formula | C20H21NO3 |
| Molecular Weight | 323.39 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO manufactures Olopatadine Impurity 9 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 Olopatadine Impurity 9 (CAS 113835-92-0), a pharmacopoeial impurity reference standard (molecular formula C20H21NO3, MW 323.39 g/mol) used for the identification and quantification of trace impurities in APIs.
Structurally, Olopatadine Impurity 9 (C20H21NO3) contains a steroid core, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 11.0, corresponding to approximately 11 ring(s) or double-bond equivalent(s). With a molecular weight of 323.39 g/mol, it falls into the moderately-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 | C20H21NO3 |
| Molecular Weight | 323.39 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 chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1989 |
| Nitrogen Atoms | 1 |
Related Olopatadine Standards
- Olopatadine impurity 146 (CAS CATO-C4X-1135146)
- Olopatadine Impurity N3 (CAS 113835-76-0)
- Olopatadine Impurity 35 (CAS 1376615-97-2)
- Olopatadine Impurity 19 (CAS 55690-15-8)
- Olopatadine lmpurity 61 (CAS CATO-C4X-171862)
- Olopatadine Impurity 47 (CAS 872040-99-8)
- Olopatadine Impurity 11 (CAS 56427-76-0)
- Olopatadine lmpurity 56 (CAS CATO-C4X-171856)
Recommended Standards
- Olotadine lmpurity 55 (CAS CATO-C4X-171855)
- Indobufen Impurity 11 (CAS 36691-02-8)
- Zolpidem Impurity 1 (CAS 109461-64-5)
- Alcaftadine Impurity 1 (CAS 147083-93-0)
- Bempedoic Acid Impurity 41 (CAS CATO-C4X-218941)
- Budesonide impurity 46 (CAS 1831164-04-5)
- Fluralaner Impurity 65 (CAS 1422465-94-8)
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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