11β-Hydroxy-5α-pregnane-3,20-dione CAS 565-94-6
| CAS No. | 565-94-6 |
| Molecular Formula | C21H32O3 |
| Molecular Weight | 332.48 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 332.48 g/mol gives 11β-Hydroxy-5α-pregnane-3,20-dione distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies 11β-Hydroxy-5α-pregnane-3,20-dione (CAS 565-94-6), a certified reference material (molecular formula C21H32O3, MW 332.48 g/mol) for analytical method development and quality control.
Based on its molecular formula C21H32O3, 11β-Hydroxy-5α-pregnane-3,20-dione contains a steroid core, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 332.48 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C21H32O3 |
| Molecular Weight | 332.48 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 Hydroxy Standards
- 7α-Hydroxy Pregnenolone (CAS 30626-96-1)
- 17-Hydroxy Pregnenolone (CAS 387-79-1)
- 1-Ethyl-4-hydroxy-6-methyl-3-(piperidin-1-yl(thiophen-2-yl)methyl)pyridin-2(1H)-one (CAS 939242-75-8)
- (cis)-3-[2-Hydroxy-4-(1,1-dimethyloctyl)phenyl]cyclohexanol (1.0mg/ml in Acetonitrile) (CAS 70434-92-3)
- 5-Ethyl-3-(4-hydroxy-2-methylphenyl)-6-methyl-2-thioxo-2,3-dihydrothieno[2,3-d]pyrimidin-4(1h)-one (CAS 777877-77-7)
- 7-Benzyl-9-hydroxy-3,7-diaza-bicyclo[3.3.1]nonane-3-carboxylic acid tert-butyl ester (CAS 313238-51-6)
- (17α)-17-Hydroxy-3-oxoandrost-4-ene-17-carboxylic acid (CAS 633-29-4)
- (S)-Hydroxy Timolol (CAS 1227468-61-2)
Recommended Standards
- 11α-Hydroxyallopregnane-3,20-dione (CAS 565-96-8)
- 17-alfa,20-alfa-Dihydroxy Progesterone-d5 (CAS 652-69-7)
- 10-Shogaol (CAS 36752-54-2)
- 17-O-Acetyl 19-Normethandriol (CAS 96059-83-5)
- (S)-C4-TunePhos (CAS 486429-94-1)
- lithium salt;2-pyridazin-3-ylacetic acid (CAS 1845687-62-8)
- (Perfluoropropane-2,2-diyl)dibenzene (CAS 83558-76-3)
- N-(3-aminopropyl)-2-(4-methoxyphenyl)acetamide hydrochloride (CAS 1596275-56-7)
- 3-Amino-3-(4-bromothiophen-2-yl)propanamide (CAS 771528-81-5)
- 4-bromo-2-ethyl-1,2-oxazolidin-3-one (CAS 127245-35-6)
- Heptafluoronaphthalen-2-ol (CAS 727-49-1)
- (S)-2-Trifluoromethylpyrrolidine-1-sulfonamide (CAS 1389310-23-9)
- 2-(3,4-Dimethoxyphenyl)-1H-indole-3-carbaldehyde (CAS 1082551-57-2)
- Tirzepatide Impurity 15 (CAS CATO-C4X-324015)
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