Trimethyl(octadecyloxy)silane CAS 18748-98-6
| CAS No. | 18748-98-6 |
| Molecular Formula | C21H46OSi |
| Molecular Weight | 342.67 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Trimethyl(octadecyloxy)silane 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.
Trimethyl(octadecyloxy)silane (CAS 18748-98-6), molecular formula C21H46OSi and molecular weight 342.67 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C21H46OSi, Trimethyl(octadecyloxy)silane contains a hydroxyl group, an ether linkage; these features give the compound characteristic functional-group stretching vibrations in infrared spectroscopy. The molecular weight of 342.67 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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 analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C21H46OSi |
| Molecular Weight | 342.67 g/mol |
| Purity | 97%+ |
| Storage | Store at room temperature |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | Stable under recommended storage conditions |
| Degree of Unsaturation (DBE) | -1.0 |
| CAS Registry Year (est.) | 1962 |
Related Trimethyl Standards
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Recommended Standards
- 332343-84-7 AMTSi082 Bis(2-methoxyphenyl)-1,1,2,2-tetramethyldisilane C18H26O2Si2 (CAS 332343-84-7)
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- 2-Chloro-6-((3-nitrophenyl)amino)-4-(trifluoromethyl)nicotinonitrile (CAS 680214-05-5)
- Methoxy-dimethyl-octadecylsilane (CAS 71808-65-6)
- tert-Butyl (3-(3-aminopyridin-4-yl)-5-methylcyclohexyl)carbamate (CAS 1824388-23-9)
- Ammonium 2-(2,4-dichlorophenoxy)acetate (CAS 2307-55-3)
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- 2-Fluoro-1-phenylethan-1-ol (CAS 450-94-2)
- Fmoc-Lys(Boc)-OPfp (CAS 86060-98-2)
- (4-Chlorobenzoyl)pyrrolidine (CAS 19202-05-2)
- 1-(3-Chloro-2-methylphenyl)-2,2,3,3,3-pentafluoropropan-1-one (CAS 1352210-01-5)
- D-Asp9-Tirzepatide (CAS CATO-CPTD788923)
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