Ercalcidiol CAS 21343-40-8
| CAS No. | 21343-40-8 |
| Molecular Formula | C28H44O2 |
| Molecular Weight | 412.65 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Ercalcidiol.
Ercalcidiol (CAS 21343-40-8), molecular formula C28H44O2 and molecular weight 412.65 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, Ercalcidiol (C28H44O2) contains a steroid core, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 7.0, corresponding to approximately 7 ring(s) or double-bond equivalent(s). With a molecular weight of 412.65 g/mol, it falls into the moderately-high-molecular-weight range. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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.
Physical & Chemical Properties
| Molecular Formula | C28H44O2 |
| Molecular Weight | 412.65 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | >95% |
| Storage | Store at room temperature, protect from light |
| 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1963 |
Related Ercalcidiol Standards
Recommended Standards
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- 2-((2-(3-Chloro-4-methylphenyl)-2-oxoethyl)thio)-3-phenylquinazolin-4(3H)-one (CAS 329079-80-3)
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- 3-Keto Sphingosine HCl (CAS 19767-16-9)
- Semaglutide Impurity 143 (CAS CATO-C4X-2226143)
Why CATO?
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