Estradiol Benzoate EP Impurity C CAS 4147-13-1
| CAS No. | 4147-13-1 |
| Molecular Formula | C32H32O4 |
| Molecular Weight | 480.59 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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 supplies Estradiol Benzoate EP Impurity C (CAS 4147-13-1), a pharmacopoeial impurity reference standard (molecular formula C32H32O4, MW 480.59 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C32H32O4, Estradiol Benzoate EP Impurity C contains a carboxylic acid group, a hydroxyl group, an ether linkage, a polycyclic aromatic system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 480.59 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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 manufactures Estradiol Benzoate EP Impurity C 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 | C32H32O4 |
| Molecular Weight | 480.59 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at room temperature, 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) | 17.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
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- 17β-Estradiol-d3 3-β-D-Glucuronide (CAS 1260231-06-8)
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- 6-Ethoxynaphthalen-2-ol (CAS 150788-85-5)
- [2-(Pyrimidin-2-ylamino)-1,3-thiazol-4-yl]acetic acid (CAS 1219828-13-3)
- 1-(3,4-Dimethylphenyl)-5-methyl-N-phenyl-1H-1,2,3-triazole-4-carboxamide (CAS 866847-90-7)
- 4-azepan-1-yl-1,1,1-trifluoro-3-(1-phenyl-1H-1,2,3,4-tetraazol-5-yl)but-3-en-2-one (CAS 152427-09-3)
- Semaglutide impurity 40 (CAS CATO-C4X-222640)
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