4-Hydroxyestriol CAS 60021-32-1
| CAS No. | 60021-32-1 |
| Molecular Formula | C18H24O4 |
| Molecular Weight | 304.38 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 304.38 g/mol gives 4-Hydroxyestriol distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
4-Hydroxyestriol (CAS 60021-32-1) is a high-purity analytical reference standard with the molecular formula C18H24O4 and a molecular weight of 304.38 g/mol.
4-Hydroxyestriol (C18H24O4) contains a flavonoid 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 4-Hydroxyestriol 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 | C18H24O4 |
| Molecular Weight | 304.38 g/mol |
| Appearance | Off-white to pale 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1974 |
Related Hydroxyestriol Standards
Recommended Standards
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- 4-[2-(Hydroxymethyl)-1H-benzoimidazol-1-yl]butyl Pivalate (CAS 797032-02-1)
- 6α-Hydroxy Estriol (CAS 7291-49-8)
- (R)-8-Amino-5,6,7,8-tetrahydroquinoline (CAS 369655-84-5)
- 5-(2,4-Difluorophenyl)pyrimidin-2-ol (CAS 1111107-95-9)
- N1-(2-Methoxyethyl)-N2-(2-(1-methyl-1,2,3,4-tetrahydroquinolin-6-yl)ethyl)oxalamide (CAS 946362-88-5)
- 4-[4-(Methylsulfonyl)-3-nitrophenyl]morpholine (CAS 1353497-55-8)
- (S)-2-((tert-Butoxycarbonyl)amino)-3-(4-methoxy-1H-indol-3-yl)propanoic acid (CAS 1956437-39-0)
- 1-(4-(2-Methoxyphenoxy)butyl)piperazine (CAS 401804-68-0)
- Esomeprazole Impurity 75 (CAS 2101206-41-9)
- 4,4'-(Anthracene-9,10-diylbis(ethene-2,1-diyl))dibenzoic acid (CAS 67546-18-3)
- 1-(1H-Pyrrol-2-yl)propane-1,2-dione (CAS 27472-40-8)
- Semaglutide impurity 91 (CAS CATO-C4X-222691)
Why CATO?
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