18-Methyl Ethynyl Estradiol CAS 14012-72-7
| CAS No. | 14012-72-7 |
| Molecular Formula | C21H26O2 |
| Molecular Weight | 310.43 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 18-Methyl Ethynyl Estradiol 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.
18-Methyl Ethynyl Estradiol (CAS 14012-72-7), molecular formula C21H26O2 and molecular weight 310.43 g/mol, is a CATO reference standard with documented purity and traceability.
18-Methyl Ethynyl Estradiol (C21H26O2) 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 aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO manufactures 18-Methyl Ethynyl Estradiol 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 | C21H26O2 |
| Molecular Weight | 310.43 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1961 |
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Recommended Standards
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- 5-Ethynyl-4-methoxypyrimidine (CAS 219915-20-5)
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- Tert-butyl (R)-(1-phenylethyl)carbamate (CAS 184888-43-5)
- N-[(S)-1-(2-Hydroxy-ethyl)-pyrrolidin-2-ylmethyl]-N-methyl-acetamide (CAS 1354007-86-5)
- 6-Nitro-2,3-dihydro-benzo[1,4]dioxine-2-carboxylic acid (CAS 797030-53-6)
- (5-Chlorothiophen-2-yl)(3-((3-(thiophen-3-yl)-1,2,4-oxadiazol-5-yl)methyl)piperidin-1-yl)methanone (CAS 1788681-94-6)
- Cannabigerorcin (CAS 38106-51-3)
- Semaglutide impurity 39 (CAS CATO-C4X-222639)
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