Calcitriol Impurity 18 CAS 147125-21-1
| CAS No. | 147125-21-1 |
| Molecular Formula | C39H70O4Si2 |
| Molecular Weight | 659.14 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Calcitriol Impurity 18.
Calcitriol Impurity 18 (CAS 147125-21-1) is a certified pharmaceutical impurity reference standard with the molecular formula C39H70O4Si2 and a molecular weight of 659.14 g/mol.
Calcitriol Impurity 18 (C39H70O4Si2) contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring 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.
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 18 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 | C39H70O4Si2 |
| Molecular Weight | 659.14 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) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1999 |
Related Calcitriol Standards
- Calcitriol Impurity 13 (CAS 169900-32-7)
- Calcitriol Impurity 19 (CAS CATO-C4X-151019)
- Calcitriol Impurity 20 (CAS CATO-C4X-151020)
- Calcitriol Impurity 24 (CAS CATO-C4X-151024)
- Calcitriol Impurity 9 (CAS CATO-C4X-15109)
- Calcitriol Impurity 14 (CAS 140710-98-1)
- Calcitriol Impurity 17 (CAS 1883417-56-8)
- Calcitriol Impurity 8 (CAS 140710-96-9)
Recommended Standards
- Erucic anhydride (CAS 103213-60-1)
- Agaricoglyceride A (CAS 557099-51-1)
- 3,4,5-Tris(dodecyloxy)benzaldehyde (CAS 117241-32-4)
- BMS-962212, >98% (HPLC) (CAS 1430114-34-3)
- Parecoxib Impurity 57 (CAS CATO-C4X-159157)
- Diclofenac sodium Impurity 57 (CAS CATO-C4X-105157)
- Rivaroxaban EP Impurity E (CAS 1415566-28-7)
- Ethyl 3-iodo-1H-pyrrolo[2,3-b]pyridine-5-carboxylate (CAS 864681-19-6)
- N-((4-Ethyl-5-mercapto-4H-1,2,4-triazol-3-yl)methyl)-4-fluorobenzamide (CAS 1024086-36-9)
- 3,6-Dichloro-2-iodotoluene (CAS 1807182-67-7)
- 2-(Piperazin-1-yl)pentan-1-ol dihydrochloride (CAS 1354954-09-8)
- 2-Fluoro-6-(4-fluorophenoxy)benzonitrile (CAS 175204-07-6)
- 1-(4-Chlorobenzoyl)-4-{[3-(propan-2-yl)-1,2,4-oxadiazol-5-yl]methyl}piperidine (CAS 1775403-33-2)
- [Ser39-OH] Tirzepatide (CAS CATO-C4X-324041)
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