5α-PREGNAN-3β, 20β-DIOL CAS 516-53-0
| CAS No. | 516-53-0 |
| Molecular Formula | C21H36O2 |
| Molecular Weight | 320.51 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
5α-PREGNAN-3β, 20β-DIOL (CAS 516-53-0), molecular formula C21H36O2 and molecular weight 320.51 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 5α-PREGNAN-3β, 20β-DIOL (C21H36O2) is characterized by a steroid core, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C21H36O2 |
| Molecular Weight | 320.51 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) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
Related PREGNAN Standards
- 5β-PREGNAN-3α, 20β-DIOL (CAS 80-91-1)
- 5α-Pregnan-3α-ol-20-one-17α,21,21,21-d4 (CAS 203805-85-0)
- 5β-Pregnan-3α-ol-20-one-17α,21,21,21-d4 (CAS 96737-93-8)
- 5α-Pregnan-3β-ol-20-one-17α,21,21,21-d4 (CAS 2687960-66-1)
- 5β-PREGNAN-20α-OL-3-ONE (CAS 54353-11-6)
- 5α-PREGNAN-3, 6, 20-TRIONE (CAS 1923-27-9)
- 5α-PREGNAN-17-OL-3, 20-DIONE (CAS 570-59-2)
- 5β-PREGNAN-17-OL-3, 20-DIONE (CAS 570-58-1)
Recommended Standards
- 5a-Pregnane-3a,20a-diol (CAS 566-58-5)
- 5α-Pregnane-3β,20(S)-diol (CAS 566-56-3)
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- 4-Hydroxy-3-(4'-hydroxy-[1,1'-biphenyl]-4-yl)-6-oxo-6,7-dihydrothieno[2,3-b]pyridine-5-carbonitrile (CAS 844499-96-3)
- (R)-2-(5-Oxopyrrolidin-2-yl)acetic acid (CAS 65137-60-2)
- Tert-butyl (R)-(1-(4-(benzyloxy)phenyl)-3-hydroxypropan-2-yl)carbamate (CAS 198470-63-2)
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- 2-(3-Ethoxyphenyl)-8-methylquinoline-4-carbonyl chloride (CAS 1160254-51-2)
- Semaglutide impurity 83 (CAS CATO-C4X-222683)
Why CATO?
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