Chloro(dimethyl)octadecylsilane CAS 18643-08-8
| CAS No. | 18643-08-8 |
| Molecular Formula | C20H43ClSi |
| Molecular Weight | 347.09 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Owing to chlorine substitution, Chloro(dimethyl)octadecylsilane is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 347.09 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
Chloro(dimethyl)octadecylsilane (CAS 18643-08-8), molecular formula C20H43ClSi and molecular weight 347.09 g/mol, is a CATO reference standard with documented purity and traceability.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C20H43ClSi |
| Molecular Weight | 347.09 g/mol |
| Purity | 97%+ |
| Storage | Store at room temperature |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate |
| Stability | Stable under recommended storage conditions |
| Degree of Unsaturation (DBE) | -1.0 |
| CAS Registry Year (est.) | 1962 |
| Halogen Content | Cl-containing |
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Recommended Standards
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- tert-Butyl (5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)thiazol-2-yl)carbamate (CAS 1245252-99-6)
- H-Phe-OBzl · HCl (CAS 2462-32-0)
- Methyl cis-13,16,19-docosatrienoate (CAS 108698-01-7)
- 3-((Diethylamino)methyl)benzaldehyde (CAS 911431-50-0)
- Meclofenamate Sodium (500 mg) (CAS 67254-91-5)
- tert-Butyl ((1-((S)-2-aminopropanoyl)piperidin-3-yl)methyl)(ethyl)carbamate (CAS 1354026-75-7)
- 5-Formyl-2’-O-methylcytidine (CAS 176858-79-0)
- N-(2-(2-fluorophenoxy)ethyl)cyclopropanamine (CAS 1040020-94-7)
- 1-(Cyclopropylmethyl)-6-oxo-1,6-dihydropyridazine-3-carboxylic acid (CAS 1592622-86-0)
- Semaglutide impurity 62 (CAS CATO-C4X-222662)
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