Calcitriol Impurity 33 CAS 104651-70-9
| CAS No. | 104651-70-9 |
| Molecular Formula | C27H44O2 |
| Molecular Weight | 400.64 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 400.64 g/mol gives Calcitriol Impurity 33 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
Calcitriol Impurity 33 (CAS 104651-70-9) is a certified pharmaceutical impurity reference standard with the molecular formula C27H44O2 and a molecular weight of 400.64 g/mol.
Calcitriol Impurity 33 (C27H44O2) contains a steroid core, a hydroxyl group, an ether linkage. 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 aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 33 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 | C27H44O2 |
| Molecular Weight | 400.64 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1986 |
Related Calcitriol Standards
- Calcitriol Impurity 10 (CAS 65445-15-0)
- Calcitriol Impurity 11 (CAS 41461-13-6)
- Calcitriol Impurity 61 (CAS CATO-C4X-151061)
- Calcitriol impurity 53 (CAS CATO-C4X-151053)
- Calcitriol Impurity 30 (CAS 69389-87-3)
- Calcitriol Impurity 63 (CAS CATO-C4X-151063)
- Calcitriol Impurity 64 (CAS CATO-C4X-151064)
- Calcitriol Impurity 65 (CAS CATO-C4X-151065)
Recommended Standards
- Calcifediol Impurity 32 (CAS 2963746-77-0)
- Cholecalciferol Impurity 32 (CAS 89231-92-5)
- 7,8-Epoxy-vitamin D3 (CAS 89231-90-3)
- Alfacalcidol impurity 9 (CAS CATO-C4X-13939)
- Fluocinolone Acetonide EP Impurity F (CAS 1526-01-8)
- Felodipine Impurity 12 (CAS 74073-22-6)
- Cefprozil Impurity 38 (CAS CATO-C4X-149238)
- 1-(2-Chloro-6-fluorobenzyl)-2-methylpiperazine hydrochloride (CAS 1261234-92-7)
- (Z)-[(3,4-Dimethylphenyl)(phenyl)methylidene]amino thiophene-2-carboxylate (CAS 1025576-93-5)
- 4-(Difluoromethoxy)-2-fluoro-1-nitrobenzene (CAS 1214336-83-0)
- Ethyl 6,7-dichloro-4-oxo-1,4-dihydroquinoline-3-carboxylate (CAS 122224-58-2)
- 1,1-Dioxidothietan-3-yl methanesulfonate (CAS 2089377-05-7)
- D-Serine benzyl ester benzenesulfonate (CAS 141527-77-7)
- Endo-Pro36-Tirzepatide (CAS CATO-CPTD788688)
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