Dichloro(methyl)(octadecyl)silane CAS 5157-75-5
| CAS No. | 5157-75-5 |
| Molecular Formula | C19H40Cl2Si |
| Molecular Weight | 367.51 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of Dichloro(methyl)(octadecyl)silane (C19H40Cl2Si) is characterized by chlorine substitution. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
CATO supplies Dichloro(methyl)(octadecyl)silane (CAS 5157-75-5), a certified reference material (molecular formula C19H40Cl2Si, MW 367.51 g/mol) for analytical method development and quality control.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
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 | C19H40Cl2Si |
| Molecular Weight | 367.51 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.) | 1958 |
| Halogen Content | Cl-containing |
Related Dichloro Standards
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- 4,6-Dichloro-5-nitro-2-[4-(1-piperidinylmethyl)phenyl]pyrimidine (CAS 1353506-55-4)
- 3,4-Dichloro-N-(2-nitrophenyl)benzo[b]thiophene-2-carboxamide (CAS 332382-11-3)
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Recommended Standards
- 1-Cyclohexyl-3-(4,5-dihydrothiazol-2-yl)-2-(2-methylquinolin-4-yl)guanidine (CAS 72042-08-1)
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- Blonanserin Impurity 32 (CAS 132810-83-4)
- N-(3-Cyano-5,6,7,8-tetrahydro-4H-cyclohepta[b]thiophen-2-yl)-2-(methyl(4-methylbenzyl)amino)acetamide (CAS 879837-43-1)
- 3-(Pyrimidin-4-yl)propanal (CAS 944898-43-5)
- Chlordisulfurylisocyanat (CAS 63549-29-1)
- 2-Ethynyl-4-fluorobenzaldehyde (CAS 749874-24-6)
- (2S)-6-Oxo-2-piperidinecarboxylic Acid 1,1-Dimethylethyl Ester (CAS 128524-48-1)
- Cis-3-Methyl-Piperidine-1,2-Dicarboxylic Acid 1-Tert-Butyl Ester (CAS 123834-09-3)
- Benzyl(S)-(1-hydroxy-3-(pyrrolidin-1-yl)propan-2-yl)(methyl)carbamate (CAS 675602-76-3)
- 5-bromo-3,4-dihydro-2H-1-benzopyran-2-one (CAS 1637490-76-6)
- 4-((2-Ethylpiperidin-1-yl)sulfonyl)aniline (CAS 436091-87-1)
- 4-(2-Bromophenyl)-4-oxobutanenitrile (CAS 884504-61-4)
- Semaglutide impurity 27 (CAS CATO-C4X-222627)
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