4-PREGNEN-17, 20β, 21-TRIOL-3-ONE CAS 128-19-8
| CAS No. | 128-19-8 |
| Molecular Formula | C21H32O4 |
| Molecular Weight | 348.48 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-PREGNEN-17, 20β, 21-TRIOL-3-ONE (C21H32O4) 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 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).
4-PREGNEN-17, 20β, 21-TRIOL-3-ONE (CAS 128-19-8), molecular formula C21H32O4 and molecular weight 348.48 g/mol, is a CATO reference standard with documented purity and traceability.
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-PREGNEN-17, 20β, 21-TRIOL-3-ONE 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 | C21H32O4 |
| Molecular Weight | 348.48 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
Related PREGNEN Standards
- 4-PREGNEN-17, 20α, 21-TRIOL-3-ONE (CAS 3946-10-9)
- 5-PREGNEN-3β, 11β, 17, 20β-TETROL (CAS 19516-75-7)
- 4-PREGNEN-6β, 21-DIOL-3, 20-DIONE (CAS 298-65-7)
- 5-PREGNEN-6, 16α-DIMETHYL-3β-OL-20-ONE (CAS 5888-08-4)
- 5-PREGNEN-16, 17-EPOXY-16β-METHYL-3β-OL-20-ONE (CAS 1922-48-1)
- 4-PREGNEN-1α, 11β, 21-TRIOL-3, 20-DIONE (CAS 10163-49-2)
- 4-PREGNEN-17, 19, 21-TRIOL-3, 20-DIONE (CAS 510-65-6)
- 4-PREGNEN-17, 20α, 21-TRIOL-3, 11-DIONE (CAS 566-38-1)
Recommended Standards
- 17,21-Dihydroxypregnenolone (CAS 1167-48-2)
- p-Coumaroylspermine (CAS 130210-35-4)
- 2,3-Dipentylanthracene-9,10-dione (CAS 113568-84-6)
- 4-Methyl-5-(1-tosylpyrrolidin-2-yl)pyridine-2(1H)-thione (CAS 1352499-27-4)
- Ethyl 2-cyano-3-[(2-ethylphenyl)amino]prop-2-enoate (CAS 1114823-95-8)
- 4-Chloro-5-fluoro-2-iodophenol (CAS 1235407-15-4)
- N-(Pyridin-4-yl)-6-(4-(thiophen-2-ylsulfonyl)piperazin-1-yl)pyridazin-3-amine (CAS 1021262-37-2)
- propyl 4-chlorobenzoate (CAS 25800-30-0)
- (4-Isobutoxy-2-methylphenyl)methanol (CAS 1254062-67-3)
- 5,7-Difluoro-1,2,3,4-tetra hydroquinoline (CAS 939758-78-8)
- 2-Amino-5-formylthiophene-3-carbonitrile (CAS 68935-75-1)
- Silodosin Impurity 18 (CAS 1384966-05-5)
- 1-(4-(Azetidin-3-yl)piperazin-1-yl)butan-1-one (CAS 930782-97-1)
- Vialox Peptide(Pentapeptide-3) (CAS 135679-88-8)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com