Maxacalcitol Impurity 16 CAS 338956-85-7
| CAS No. | 338956-85-7 |
| Molecular Formula | C33H51O3PSi2 |
| Molecular Weight | 582.90 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 582.90 g/mol gives Maxacalcitol Impurity 16 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
As a process- or degradation-related impurity, Maxacalcitol Impurity 16 (CAS 338956-85-7, C33H51O3PSi2) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Maxacalcitol Impurity 16 (C33H51O3PSi2) 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 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).
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.
As a certified reference material (CRM), Maxacalcitol Impurity 16 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 | C33H51O3PSi2 |
| Molecular Weight | 582.90 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| 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) | 8.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
Related Maxacalcitol Standards
- Maxacalcitol Impurity N1 (CAS 81522-68-1)
- Maxacalcitol Impurity 45 (CAS 227961-44-6)
- Maxacalcitol Impurity 46 (CAS CATO-C4X-151046)
- Maxacalcitol Impurity 49 (CAS 496046-11-8)
- Maxacalcitol Impurity 50 (CAS CATO-C4X-151050)
- Maxacalcitol Impurity 14 (CAS 496046-06-1)
- Maxacalcitol Impurity 15 (CAS 215929-37-6)
- Maxacalcitol Impurity 48 (CAS 127492-07-3)
Recommended Standards
- 4′,4′′′′-(1,4-phenylene)bis(2,2′:6′,2′′-terpyridine) (CAS 146406-75-9)
- (2S)-N-[1-(2-Chlorophenyl)-2-[(3,3-difluorocyclobutyl)amino]-2-oxoethyl]-1-(4-cyano-2-pyridyl)-N-(5-fluoro-3-pyridyl)-5-oxopyrrolidine-2-carboxamide (CAS 1448346-63-1)
- Ivosidenib (CAS 1448347-49-6)
- (S)-N-((R)-1-(2-chlorophenyl)-2-((3,3-difluorocyclobutyl)amino)-2-oxoethyl)-1-(4-cyanopyridin-2-yl)-N-(5-fluoropyridin-3-yl)-5-oxopyrrolidine-2-carboxamide (CAS 2070009-31-1)
- Flurbiprofen Impurity 139 (CAS CATO-C4X-1444139)
- chondroitin sulfate impurity A (CAS CATO-C4X-32811)
- Oryzanol Impurity 4 (CAS CATO-C4X-28614)
- 3-Bromo-4-methyl-5-(trifluoromethyl)benzoic acid (CAS 2324179-05-5)
- Ramelteon Impurity 52 (CAS CATO-C4X-262252)
- (3R,4R)-4-methylpyrrolidin-3-amine (CAS 113617-67-7)
- (3,4-Dichlorophenyl)methanesulfonyl fluoride (CAS 1934735-36-0)
- 2-Amino-4,4-difluorocyclopentanol (CAS 1934847-53-6)
- Methyl (3R,4S)-4-(4-fluorophenyl)pyrrolidine-3-carboxylate (CAS 1187930-65-9)
- Semaglutide (CAS CATO-C4X-2226105)
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