5β-Pregnan-3α,21-diol-20-one-17α,21,21-d3 CAS 72205-58-4
| CAS No. | 72205-58-4 |
| Molecular Formula | - |
| Molecular Weight | 337.51 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
5β-Pregnan-3α,21-diol-20-one-17α,21,21-d3 (CAS 72205-58-4), molecular formula C21H31D3O3 and molecular weight 337.51 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 5β-Pregnan-3α,21-diol-20-one-17α,21,21-d3 (C21H31D3O3) contains deuterium isotope labeling, a steroid core, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 6.5, corresponding to approximately 6 ring(s) or double-bond equivalent(s). With a molecular weight of 337.51 g/mol, it falls into the moderately-high-molecular-weight range. 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).
As a certified reference material (CRM), 5β-Pregnan-3α,21-diol-20-one-17α,21,21-d3 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 | C21H31D3O3 |
| Molecular Weight | 337.51 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) | 6.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1977 |
Related Pregnan Standards
- 5β-PREGNAN-3α, 11β, 20β-TRIOL (CAS 10417-85-3)
- 5β-PREGNAN-3α, 17, 20β-TRIOL (CAS 1165-28-2)
- 5α-PREGNAN-3α, 17, 20β-TRIOL (CAS 13933-75-0)
- 5-b-Pregnan-3-a,11-a-,20-b-triol (CAS 55647-22-8)
- 5α-PREGNAN-3β, 17, 20β-TRIOL (CAS 520-86-5)
- 5a-Pregnan-3b,17a-diol-20-one (CAS 570-54-7)
- 5β-PREGNAN-3α, 11β-DIOL-20-ONE (CAS 565-92-4)
- 5β-PREGNAN-3α, 17-DIOL-20-ONE (CAS 570-52-5)
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