3α,11 β-Dihydroxy-5α-pregnan-20-one CAS 23930-29-2
| CAS No. | 23930-29-2 |
| Molecular Formula | C21H34O3 |
| Molecular Weight | 334.49 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 334.49 g/mol gives 3α,11 β-Dihydroxy-5α-pregnan-20-one distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
3α,11 β-Dihydroxy-5α-pregnan-20-one (CAS 23930-29-2) is a high-purity analytical reference standard with the molecular formula C21H34O3 and a molecular weight of 334.49 g/mol.
Based on its molecular formula C21H34O3, 3α,11 β-Dihydroxy-5α-pregnan-20-one 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 334.49 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.
As a certified reference material (CRM), 3α,11 β-Dihydroxy-5α-pregnan-20-one meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
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.) | 1963 |
Related Dihydroxy Standards
- 3α,21-Dihydroxy-5α-pregnan-20-one (CAS 567-02-2)
- 11，15-Dihydroxy-16-kauren-19-oic acid (CAS 57719-76-3)
- 6,6'-Dihydroxy-5,5'-dimethoxy-[1,1'-biphenyl]-3,3'-dicarboxylic acid (CAS 2134-90-9)
- 3,4-Dihydroxy-N-methyl-9,10-dioxo-9,10-dihydroanthracene-2-sulfonamide (CAS 1313738-86-1)
- 5,7-Dihydroxy-2',2'-dimethyl-2'H,4H-[3,6'-bichromen]-4-one (CAS 121747-89-5)
- 2,5-dihydroxy-3,6-bis(4-hydroxyphenyl)cyclohexa-2,5-diene-1,4-dione (CAS 519-67-5)
- 2,4-Dihydroxy-6-tridecylbenzoic Acid (CAS 62071-09-4)
- 5,12-Dihydroxy-6,8,10,14-Eicosatetraenoic Acid (CAS 73151-67-4)
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