Olopatadine Impurity 66 CAS CATO-C4X-171866
| CAS No. | CATO-C4X-171866 |
| Molecular Formula | C18H14O4 |
| Molecular Weight | 294.30 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Olopatadine Impurity 66 (C18H14O4) contains a flavonoid core, a hydroxyl group, an ether linkage. Its high carbon-to-hydrogen ratio confers good lipid solubility, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
CATO supplies Olopatadine Impurity 66 (CAS CATO-C4X-171866), a pharmacopoeial impurity reference standard (molecular formula C18H14O4, MW 294.30 g/mol) used for the identification and quantification of trace impurities in APIs.
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.
CATO manufactures Olopatadine Impurity 66 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 | C18H14O4 |
| Molecular Weight | 294.30 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 chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
Related Olopatadine Standards
- Olopatadine lmpurity 58 (CAS CATO-C4X-171858)
- Olopatadine Impurity 18 (CAS 55453-90-2)
- Olopatadine Impurity 26 (CAS 55690-18-1)
- Olopatadine Impurity 20 (CAS 962-95-8)
- Olopatadine Impurity 28 (CAS 55453-89-9)
- Olopatadine Impurity 25 (CAS 88630-37-9)
- Olopatadine Impurity 37 (CAS 55689-64-0)
- Olopatadine Carbaldehyde (CAS CATO-C4X-171815)
Recommended Standards
- Oxcarbazepine EP Impurity L（Mixture of Tautomers） (CAS CATO-C4X-116416)
- Neomycin Impurity 15 (CAS 58096-76-7)
- Mitiglinide Impurity 8 (CAS 19806-12-3)
- Phentolamine Impurity 21 (CAS CATO-C4X-224721)
- Alanyl Glutamine Impurity 24 TFA Salt (CAS CATO-C4X-197424)
- Minodronic Impurity 34 (CAS 164733-64-6)
- Doxepin EP Impurity B (CAS 4504-88-5)
- 1-Amino-3,3-difluorocyclobutane-1-carboxylic acid hydrochloride (CAS 1423033-66-2)
- 2-Ethyl-3-methyl-1H-indole-7-carboxylic acid (CAS 876715-53-6)
- 1,6-Diamino-4-(2-chlorophenyl)-2-oxo-1,2-dihydropyridine-3,5-dicarbonitrile (CAS 79388-09-3)
- 1-Methyl-2-phenyl-1H-pyrrolo[2,3-b]pyridine-3-carbaldehyde (CAS 521984-95-2)
- 6-Bromo-3-fluoroimidazo[1,2-a]pyridine-2-carboxylic acid (CAS 1279219-30-5)
- 3-Methyl-4-nitro-2-pyridinecarboxylic acid (CAS 30235-17-7)
- (Des-Gly2)-Exenatide trifluoroacetate salt (CAS 1678416-78-8)
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