20-alfa-Dihydropregnenolone CAS 901-56-4
| CAS No. | 901-56-4 |
| Molecular Formula | C21H34O2 |
| Molecular Weight | 318.49 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 20-alfa-Dihydropregnenolone (CAS 901-56-4), a certified reference material (molecular formula C21H34O2, MW 318.49 g/mol) for analytical method development and quality control.
Based on its molecular formula C21H34O2, 20-alfa-Dihydropregnenolone 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 318.49 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
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 | C21H34O2 |
| Molecular Weight | 318.49 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at room temperature |
| 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 alfa Standards
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Recommended Standards
- 2-(Tetradecyloxy)benzaldehyde (CAS 24083-20-3)
- 20β-Dihydro Pregnenolone (CAS 901-57-5)
- 2-(4-fluorophenyl)-3-hydroxypropanoic acid (CAS 2967-95-5)
- 4-(Tetradecyloxy)benzaldehyde (CAS 59117-17-8)
- 3-(5-Chloro-2-nitrophenyl)propanenitrile (CAS 1540232-65-2)
- 6-(Piperazin-1-yl)-3,4-dihydroquinolin-2(1H)-one (CAS 87154-95-8)
- N-[4-(2-Methyl-thiazol-4-yl)-phenyl]-succinamic acid (CAS 393837-72-4)
- 6-Chloro-3-piperidin-4-yl-1H-indole hydrochloride (CAS 185255-74-7)
- 6-(4-Methyl-1H-pyrazol-1-yl)nicotinonitrile (CAS 1184066-45-2)
- 5-(4-Fluorobenzyl)-8-methoxy-3-(4-methoxyphenyl)-5H-pyrazolo[4,3-c]quinoline (CAS 866347-48-0)
- 3-(Diethylamino)phenyl methylcarbamate (CAS 2631-26-7)
- (R)-1-(3-(trifluoromethoxy)phenyl)propan-1-amine (CAS 1212933-09-9)
- 1-Cyclobutylbutan-1-amine (CAS 1270355-60-6)
- Tau Peptide (307-321) trifluoroacetate salt (CAS 330456-50-3)
Why CATO?
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