Estradiol Impurity 31 CAS CATO-C4X-163631
| CAS No. | CATO-C4X-163631 |
| Molecular Formula | C30H32O2 |
| Molecular Weight | 424.57 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a process- or degradation-related impurity, Estradiol Impurity 31 (CAS CATO-C4X-163631, C30H32O2) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Estradiol Impurity 31 (C30H32O2) contains a steroid 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.
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 Estradiol Impurity 31 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 | C30H32O2 |
| Molecular Weight | 424.57 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >95% |
| Storage | Store at room temperature, protect from light |
| 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) | 15.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
Related Estradiol Standards
- Estradiol Impurity 49 (CAS CATO-C4X-163649)
- Estradiol Impurity 39 (CAS 50394-95-1)
- Estradiol Impurity 43 (CAS 19590-55-7)
- Estradiol Benzoate EP Impurity H (CAS 4954-17-0)
- β-Estradiol 3,17-DisulfateDISCONTINUED, offer E888945 (CAS 3233-70-3)
- Estradiol-3,17b-dibutyrate (CAS 63042-23-9)
- Estradiol Impurity 46 (CAS CATO-C4X-163646)
- Estradiol Impurity 35 (CAS 1373116-15-4)
Recommended Standards
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- Sodium 2-((dodecyloxy)carbonyl)-4-sulfonatobenzoate (CAS 6879-45-4)
- Chenodeoxycholic Acid Impurity 4 (CAS CATO-C4X-15834)
- Sacubitril Impurity 30 (CAS CATO-C4X-280930)
- Piperazine Impurity 34 (CAS CATO-C4X-242734)
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- 4-tert-Butoxycarbonylaminobut-2-enoic Acid Ethyl Ester (CAS 510729-27-8)
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- O1-tert-butyl O3-methyl trans-3,5-difluoro-4-oxo-piperidine-1,3-dicarboxylate (CAS 1612176-82-5)
- (2E,4E)-N,N-Diphenylhexa-2,4-dienamide (CAS 61859-44-7)
- 5-[4-(diethylamino)phenyl]-4-methyl-4h-1,2,4-triazole-3-thiol (CAS 669748-04-3)
- [D-Ser8]-Semaglutide A (CAS CATO-C4X-2226116)
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