Calcitriol impurity 47 CAS 599165-21-6
| CAS No. | 599165-21-6 |
| Molecular Formula | C42H80O3Si3 |
| Molecular Weight | 717.34 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Structurally, Calcitriol impurity 47 (C42H80O3Si3) contains a carboxylic acid group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 3.0, corresponding to approximately 3 ring(s) or double-bond equivalent(s). With a molecular weight of 717.34 g/mol, it falls into the 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.
CATO supplies Calcitriol impurity 47 (CAS 599165-21-6), a pharmacopoeial impurity reference standard (molecular formula C42H80O3Si3, MW 717.34 g/mol) used for the identification and quantification of trace impurities in APIs.
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
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 | C42H80O3Si3 |
| Molecular Weight | 717.34 g/mol |
| 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) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1984 |
Related Calcitriol Standards
- Calcitriol impurity 56 (CAS CATO-C4X-151056)
- Calcitriol Impurity 23 (CAS CATO-C4X-151023)
- Calcitriol Impurity 60 (CAS CATO-C4X-151060)
- Calcitriol Impurity 22 (CAS 200636-54-0)
- Calcitriol Impurity 13 (CAS 169900-32-7)
- Calcitriol Impurity 18 (CAS 147125-21-1)
- Calcitriol Impurity 19 (CAS CATO-C4X-151019)
- Calcitriol Impurity 20 (CAS CATO-C4X-151020)
Recommended Standards
- 1,1,2,2-Tetrakis(4-((trimethylsilyl)ethynyl)phenyl)ethene (CAS 741259-14-3)
- 5-Amino-8-((4-((4,6-dichloro-1,3,5-triazin-2-yl)amino)-3-sulfophenyl)amino)-9,10-dioxo-9,10-dihydroanthracene-1,2-disulfonic acid (CAS 94087-01-1)
- 1,1′-[Dithiobis[2,1-ethanediyl(methylimino)-3,1-propanediyl]] ditetradecanoate (CAS 1436860-60-4)
- Di-μ-chlorotetrakis[(1,2-η)-cyclooctene]dirhodium (CAS 63902-12-5)
- Papaverine Impurity 28 (CAS 20122-48-9)
- Suzetrigine Impurity 17 (CAS CATO-C4X-336917)
- Palbociclib Impurity 23 HCl (CAS 2098673-40-4（free base）)
- 3,4-Dichloro-1,8-naphthyridine (CAS 72235-40-6)
- 4-(Chloromethyl)-1-ethoxy-4-methylhexane (CAS 1463472-56-1)
- N1-((Ethylimino)methylene)-N3,N3-dimethylpropane-1,3-diamine (CAS 1892‑57‑5)
- 3-Isopropyl-5-(piperidin-2-yl)-1,2,4-oxadiazole (CAS 915924-51-5)
- 3-(1,3-Dioxolan-2-yl)cyclobutane-1-carboxylic acid (CAS 1414513-77-1)
- 3a-(Trifluoromethyl)-3,3a-dihydrobenzo[d]pyrrolo[2,1-b]thiazol-1(2H)-one (CAS 1191890-53-5)
- Semaglutide impurity 204 (CAS CATO-C4X-2226204)
Why CATO?
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