Calcitriol Impurity 16 CAS 98728-26-8
| CAS No. | 98728-26-8 |
| Molecular Formula | C33H58O3Si |
| Molecular Weight | 530.90 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Structurally, Calcitriol Impurity 16 (C33H58O3Si) contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 5.0, corresponding to approximately 5 ring(s) or double-bond equivalent(s). With a molecular weight of 530.90 g/mol, it falls into the moderately-high-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
As a process- or degradation-related impurity, Calcitriol Impurity 16 (CAS 98728-26-8, C33H58O3Si) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
CATO manufactures Calcitriol Impurity 16 under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C33H58O3Si |
| Molecular Weight | 530.90 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| 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) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1985 |
Related Calcitriol Standards
- Calcitriol Impurity 15 (CAS 132054-64-9)
- Calcitriol Impurity 12 (CAS CATO-C4X-151012)
- Calcitriol Impurity 21 (CAS 115648-67-4)
- Calcitriol Impurity 22 (CAS 139239-33-1)
- pre-Calcitriol PTAD Adduct (impurity) (CAS 86307-31-5)
- Calcitriol Impurity 66 (CAS CATO-C4X-151066)
- Pro-Calcitriol PTAD Adduct (CAS 137342-95-1)
- Calcitriol EP Impurity C(Mixture of Diastereomers) (CAS 86307-44-0)
Recommended Standards
- Bis(acetonitrile)palladium(II) p-toluenesulfonate (CAS 114757-66-3)
- 1-[4-(4-Chlorophenyl)-1,3-thiazol-2-yl]-5-(trifluoromethyl)-N-{[3-(trifluoromethyl)phenyl]methyl}-1H-pyrazole-4-carboxamide (CAS 321998-55-4)
- (E)-N'-(1-(5-Chloro-2-(hexyloxy)phenyl)-2,2,2-trifluoroethylidene)-2-(trifluoromethyl)benzenesulfonohydrazide (CAS 2738683-60-6)
- Octadecyl 3-(3,5-Di-Tert-Butyl-4-Hydroxyphenyl)Propionate (CAS 2082-79-3)
- Desloratadine Impurity 24 (CAS CATO-C4X-143024)
- Leuprorelin Impurity 48 (CAS CATO-C4X-182248)
- Posaconazole Impurity 66 (CAS 165115-83-3)
- tert-Butyl (4-iodo-6-methoxypyridin-3-yl)carbamate (CAS 1200132-06-4)
- 5,6-Dihydroquinolin-5-ol (CAS 160240-11-9)
- 2-Methyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrrole (CAS 676501-88-5)
- N-(3-Cyanopyridin-2-yl)acetamide (CAS 69278-08-6)
- 1-(4-(3-(Dimethylamino)acryloyl)phenyl)pyridin-4(1H)-one (CAS 241488-20-0)
- 4-Benzyldihydrofuran-2(3H)-one (CAS 22530-98-9)
- Semaglutide impurity 39 (CAS CATO-C4X-222639)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com