Beta-Estradiol CAS 50-28-2
| CAS No. | 50-28-2 |
| Molecular Formula | C18H24O2 |
| Molecular Weight | 272.38 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Beta-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.
Beta-Estradiol (CAS 50-28-2), molecular formula C18H24O2 and molecular weight 272.38 g/mol, is a CATO reference standard with documented purity and traceability.
Beta-Estradiol (C18H24O2) 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 Beta-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 | C18H24O2 |
| Molecular Weight | 272.38 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | >95% |
| 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
Related Beta Standards
- Estradiol Impurity 22 (CAS CATO-C4X-163622)
- Estradiol Impurity 23 (CAS 1093411-48-3)
- Estradiol Impurity 55 (CAS CATO-C4X-163655)
- Estradiol EP Impurity D-d3 (delta-9(11)-Estradiol-d3) (CAS 791-69-5 (non-labelled))
- Estradiol Impurity 45 (CAS 894-81-5)
- 17beta-Estradiol-13C2 (CAS 82938-05-4)
- Estradiol Hemihydrate EP Impurity A (CAS 19973-76-3)
- Estradiol Impurity 2 (17beta-delta8,9-Dehydroestradiol) (CAS 23392-52-1)
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Why CATO?
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