Paricalcitol lmpurity 41 CAS CATO-C4X-138741
| CAS No. | CATO-C4X-138741 |
| Molecular Formula | C32H51O3PSi2 |
| Molecular Weight | 570.89 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Paricalcitol lmpurity 41 (C32H51O3PSi2) contains a phosphonate group, a carboxylic acid group, a hydroxyl group, an ether linkage, a polycyclic aromatic system. Its high carbon-to-hydrogen ratio confers good lipid solubility, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
Paricalcitol lmpurity 41 (CAS CATO-C4X-138741) is a certified pharmaceutical impurity reference standard with the molecular formula C32H51O3PSi2 and a molecular weight of 570.89 g/mol.
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 | C32H51O3PSi2 |
| Molecular Weight | 570.89 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | >95% |
| Storage | Store at room temperature, 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) | 7.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
Related Paricalcitol Standards
- Paricalcitol 25-β-D-Glucuronide (CAS 1260588-15-5)
- Paricalcitol Impurity 18 (CAS CATO-C4X-138718)
- Paricalcitol Impurity 14 (CAS 194158-46-8)
- Paricalcitol Impurity 44 (CAS CATO-C4X-138744)
- Paricalcitol Impurity 28 (CAS 139356-36-8)
- Paricalcitol-D6 (CAS CATO-C4X-138745)
- Paricalcitol Impurity 33 (CAS CATO-C4X-138733)
- Paricalcitol Impurity 37 (CAS 1154606-20-8)
Recommended Standards
- [2-[(3R,5R)-3,5-Bis[[(1,1-dimethylethyl)dimethylsilyl]oxy]cyclohexylidene]ethyl]diphenylphosphine oxide (CAS 139356-39-1)
- (5-((2-Chlorophenyl)thio)-1-methyl-3-phenyl-1H-pyrazol-4-yl)methyl 3,5-bis(trifluoromethyl)benzoate (CAS 318289-58-6)
- Cyclohexyl 2-(4-methylpiperazinomethyl)phenyl ketone (CAS 898762-65-7)
- {5-[(4-chlorophenyl)sulfanyl]-1-methyl-3-phenyl-1H-pyrazol-4-yl}methyl 3,5-bis(trifluoromethyl)benzoate (CAS 318289-10-0)
- 【肽序重复停用见C4X-201413】Cetrorelix Impurity 37 (CAS CATO-C4X-201437)
- Cefditoren Impurity 49 (CAS CATO-C4X-135849)
- Clopidogrel Impurity 71 (CAS 1346231-36-4)
- D-Maltotriose undecaacetate (CAS 93911-20-7)
- 1-(Isoquinolin-5-yl)ethan-1-amine (CAS 1083368-45-9)
- ((1S,2S)-2-Methylcyclopentyl)boronic acid (CAS 97276-85-2)
- 2-{[(5-chloro-1-methyl-3-phenyl-1H-pyrazol-4-yl)methyl]sulfanyl}benzoic acid (CAS 318234-17-2)
- 7-Bromopyrido[2,3-b]pyrazine-6-carboxylic acid (CAS 887206-72-6)
- 3-amino-6-bromopyrazine-2-thiol (CAS 6863-75-8)
- Des-Pro-Pro-Tirzepatide (CAS CATO-CPTD788696)
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