3-epi-Vitamin D3 CAS 57651-82-8
| CAS No. | 57651-82-8 |
| Molecular Formula | C27H44O |
| Molecular Weight | 384.64 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 3-epi-Vitamin D3 is closely related to a steroid core, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
CATO supplies 3-epi-Vitamin D3 (CAS 57651-82-8), a certified reference material (molecular formula C27H44O, MW 384.64 g/mol) for analytical method development and quality control.
Based on its molecular formula C27H44O, 3-epi-Vitamin D3 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 384.64 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.
As a certified reference material (CRM), 3-epi-Vitamin 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 | C27H44O |
| Molecular Weight | 384.64 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1973 |
Related epi Standards
- Vitamin D (CAS 1406-16-2)
- Vitamin D3 Impurity 4 (CAS 573951-39-0)
- Vitamin D3 (CAS 67-97-0)
- Vitamin B2-13C4,15N2 (CAS 1217461-14-7)
- Vitamin D3-[d3] (CAS 80666-48-4)
- Vitamin E Related Compound 1 (2-Methyl-2-(4,8,12-Trimethyltridecyl)-6-Chromanol) (CAS 119-98-2)
- Vitamin D3-D7 (CAS 1627523-19-6)
- Vitamin B2 (CAS 83-88-5)
Recommended Standards
- 3-(4-Methoxyphenyl)-5-[(2,4,5-trichlorophenoxy)methyl]-1,2-oxazole (CAS 478066-45-4)
- 3-Hydroxytetracosanoic acid (CAS 91297-89-1)
- 2-Hydroxytetracosanoic acid (CAS 544-57-0)
- 5, 22E-CHOLESTADIEN-3β-OL (CAS 34347-28-9)
- 5,6-Dimethyl-2-(methylthio)-3,5-dihydro-4H-pyrrolo[3,2-d]pyrimidin-4-one (CAS 1255787-96-2)
- tert-Butyl N-(4-amino-4-oxobutyl)carbamate (CAS 91419-46-4)
- 2-((4,5-Dimethyloxazol-2-yl)methoxy)benzonitrile (CAS 1183744-60-6)
- 4-Chloro-2-(methylthio)benzo[d]thiazole (CAS 3507-40-2)
- 4,6-dichloro-1H-pyrazolo[3,4-b]pyridine (CAS 2105905-46-0)
- 5-Bromo-6-chloro-1H-indol-3-yl butyrate (CAS 873295-29-5)
- 2-amino-6-(hydroxymethyl)-4-oxo-4,6,7,8-tetrahydropteridine-5(3H)-carbaldehyde (CAS CATO-C3D-262395)
- 2-Chloro-6-hydroxybenzene-1-sulfonyl chloride (CAS 1261568-90-4)
- Ethyl 2-amino-1-[trans-4-[(tert-butyldimethylsilyl)oxy]cyclohexyl]-1H-benzo[d]imidazole-5-carboxylate (CAS 1012104-43-6)
- Semaglutide Impurity 165 (CAS CATO-C4X-2226165)
Why CATO?
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