Estradiol Valerate Impurity 20 CAS CATO-C4X-284220
| CAS No. | CATO-C4X-284220 |
| Molecular Formula | C28H40O4 |
| Molecular Weight | 440.61 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Estradiol Valerate Impurity 20 (CAS CATO-C4X-284220), a pharmacopoeial impurity reference standard (molecular formula C28H40O4, MW 440.61 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C28H40O4, Estradiol Valerate Impurity 20 contains a steroid core, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 440.61 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.
CATO manufactures Estradiol Valerate Impurity 20 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 | C28H40O4 |
| Molecular Weight | 440.61 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
Related Estradiol Standards
- Estradiol Valerate EP Impurity E (CAS 63042-28-4)
- Estradiol Valerate EP Impurity H (CAS 1421283-56-8)
- Estradiol Impurity 35 (CAS 1373116-15-4)
- β-Estradiol 3-benzoate 17-n-butyrate (CAS 63042-18-2)
- 17β-Estradiol 17β-D-Glucuronide (CAS 1806-98-0)
- 17beta-Estradiol 3-beta-D-Glucuronide (CAS 15270-30-1)
- β-Estradiol 3,17-DisulfateDISCONTINUED, offer E888945 (CAS 3233-70-3)
- Estradiol Impurity 43 (CAS 19590-55-7)
Recommended Standards
- Bempedoic Acid Impurity 41 (CAS CATO-C4X-218941)
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- 1,3,5,7-Tetraphenyladamantane (CAS 16004-75-4)
- Selexipag Impurity 19 (CAS CATO-C4X-196119)
- Ilaprazole Impurity 142 (CAS CATO-C4X-1130142)
- Eltrombopag Impurity 85(E-Isomer) (CAS CATO-C4X-119885)
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- (2-(Pyridin-4-ylmethyl)-2,4,5,7-tetrahydropyrano[3,4-c]pyrazol-7-yl)methanol (CAS 1422133-05-8)
- 7-METHYL-THIAZOLO[4,5-B]PYRIDINE-2,5(3H,4H)-DIONE (CAS 128294-07-5)
- (1S,3R)-3-Methoxy-cyclohexylamine hydrochloride (CAS 1821738-84-4)
- Steroidogenesis-Activator Polypeptide (rat) (H-8855.0500) (CAS 108563-23-1)
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