(3α,5β)-Pregnane-3,20,21-triol CAS 2041-77-2
| CAS No. | 2041-77-2 |
| Molecular Formula | C21H36O3 |
| Molecular Weight | 336.51 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.
(3α,5β)-Pregnane-3,20,21-triol (CAS 2041-77-2), molecular formula C21H36O3 and molecular weight 336.51 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a steroid core, a hydroxyl group, an ether linkage, (3α,5β)-Pregnane-3,20,21-triol is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 336.51 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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), (3α,5β)-Pregnane-3,20,21-triol 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 | C21H36O3 |
| Molecular Weight | 336.51 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) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
Related Pregnane Standards
- 5α-Pregnane-3α,17α-diol-20-one (CAS 6890-65-9)
- 5a-Pregnane-3a,20a-diol (CAS 566-58-5)
- 5α-Pregnane-3β,20(S)-diol (CAS 566-56-3)
- 5β-Pregnane-3β,20(S)-diol (CAS 80-90-0)
- 5Beta-Pregnane-3Alpha,20Alpha-Diol (CAS 80-92-2)
- 5α-Pregnane-3-one-20α-ol (CAS 516-59-6)
- (5α)-Pregnane-3,20-dione Cyclic 20-(1,2-Ethanediyl Acetal) (CAS 1452-23-9)
- Pregnane-d4 (CAS 205529-77-7)
Recommended Standards
- 5α-PREGNAN-3α, 17, 20β-TRIOL (CAS 13933-75-0)
- (4R,4′R)-4,4′,5,5′-Tetrahydro-4,4′-bis(1-propylbutyl)-2,2′-bioxazole (CAS 2094987-84-3)
- 1,3-Diadamantylimidazol-2-ylidene (CAS 131042-77-8)
- (4S,4′S)-4,4′,5,5′-Tetrahydro-4,4′-bis(1-propylbutyl)-2,2′-bioxazole (CAS 2094476-37-4)
- 2 5-Dichlorophenylhydrazine-4-Sulfonic Acid (CAS 118-89-8)
- ethyl 2-cyano-4,4-dimethoxybutanoate (CAS 773076-83-8)
- 2-Chloro-5h-pyrrolo[3,2-d]pyrimidine-7-carbaldehyde (CAS 1824084-20-9)
- 2-(5-Bromo-6-chloropyridin-3-yl)acetic acid (CAS 1227571-87-0)
- 1-(3-Methoxypropyl)-4-nitropyrazole (CAS 1240572-44-4)
- Tert-butyl (3-carbamothioylphenyl)carbamate (CAS 1340377-65-2)
- (Pyridin-3-ylmethyl)[4-(trifluoromethyl)benzyl]amine (CAS 827329-11-3)
- 6-(Trifluoromethyl)-1h-1,3-benzodiazole-2-thiol (CAS 86604-73-1)
- (3-METHOXYPHENYL)ACETONITRILE (M-METHOXYPHENYL)ACETONITRILE 2-(3-METHOXYPHENYL)ACETONITRILE 3-(CYANOMETHYL)ANISOLE 3-Chloro-2-methylphenol 3-METHOXYBENZYL CYANIDE 3260-87-5 AS02821 M-METHOXYBENZYL CYANIDE OTAVA-BB 1287078 PARAGOS 510024 PHARMABRIDGE P-2049 PHENOL, 3-CHLORO-2-METHYL- (CAS 3260-87-5)
- Insulin Degludec Impurity 13 (CAS CATO-C4X-215713)
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