Ethynyl Estradiol 3-Acetate CAS 5779-47-5
| CAS No. | 5779-47-5 |
| Molecular Formula | C22H26O3 |
| Molecular Weight | 338.44 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Ethynyl Estradiol 3-Acetate is closely related to a steroid core, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Ethynyl Estradiol 3-Acetate (CAS 5779-47-5) is a high-purity analytical reference standard with the molecular formula C22H26O3 and a molecular weight of 338.44 g/mol.
Owing to a steroid core, a hydroxyl group, an ether linkage, Ethynyl Estradiol 3-Acetate is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 338.44 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
As a certified reference material (CRM), Ethynyl Estradiol 3-Acetate meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C22H26O3 |
| Molecular Weight | 338.44 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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
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Recommended Standards
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- tert-Butyl N-[(2-chloropyridin-4-yl)methyl]carbamate (CAS 916210-27-0)
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- 3-(4-(4-Bromophenyl)-5-((3-methylbenzyl)thio)-4H-1,2,4-triazol-3-yl)pyridine (CAS 678971-55-6)
- 1,3-Bis(hydroxymethyl)thiourea (CAS 3084-25-1)
- 5-Bromobenzofuran-2-carboxamide, 97% (CAS 35351-21-4)
- Tert-butyl (4-ethyl-2-(piperidin-4-yl)hexyl)carbamate (CAS 1306604-06-7)
- 4-Methyl-2-phenylimidazole (CAS 827-43-0)
- 2-Chloro-4-hydroxyphenethyl quinoline-8-carboxylate (CAS 90051-85-7)
- Semaglutide impurity 247 (CAS CATO-C4X-2226247)
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