(3β,5α,11α)-3,11-Dihydroxypregnan-20-one CAS 565-91-3
| CAS No. | 565-91-3 |
| Molecular Formula | C21H34O3 |
| Molecular Weight | 334.49 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies (3β,5α,11α)-3,11-Dihydroxypregnan-20-one (CAS 565-91-3), a certified reference material (molecular formula C21H34O3, MW 334.49 g/mol) for analytical method development and quality control.
Structurally, (3β,5α,11α)-3,11-Dihydroxypregnan-20-one (C21H34O3) contains a steroid core, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 5.0, corresponding to approximately 5 ring(s) or double-bond equivalent(s). With a molecular weight of 334.49 g/mol, it falls into the moderately-high-molecular-weight range. 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 (3β,5α,11α)-3,11-Dihydroxypregnan-20-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 | C21H34O3 |
| Molecular Weight | 334.49 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at room temperature, keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
Related Dihydroxypregnan Standards
Recommended Standards
- (3β,20R)-Pregn-5-ene-3,17,20-triol (CAS 2204-13-9)
- (20R)-Pregn-4-ene-3,17,20-triol (CAS 384342-63-6)
- (3β,20S)-Pregn-5-ene-3,17,20-triol (CAS 903-67-3)
- (±)5-HETE methyl ester (CAS 73279-38-6)
- 1-(2-Chlorophenyl)cyclohexane-1-carbonitrile (CAS 106795-73-7)
- 4-(Trifluoromethyl)cyclohexane-1-carboxamide (CAS 361393-84-2)
- 4-Bromo-N-cyclopropylthiazol-2-amine (CAS 1159816-42-8)
- 4-Chloro-7-(4-methoxybenzyl)-6,7-dihydro-5H-pyrrolo[2,3-d]pyrimidine (CAS 853680-76-9)
- 4-Bromo-3-(trifluoromethyl)benzoic acid (CAS 161622-14-6)
- N1-Cyclopropyl-N2-(2-(4-fluorophenoxy)ethyl)oxalamide (CAS 1208406-33-0)
- 2,2,2-trifluoroethyl N-(2,4-dichlorophenyl)carbamate (CAS 1087798-16-0)
- 5-Bromo-3-iodo-1-methyl-1H-indazole (CAS 865156-34-9)
- 5-Acetamido-2-chlorophenol (CAS 28443-52-9)
- Endo-Ala35-Tirzepatide (CAS CATO-CPTD788687)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com