CAS 18643-08-8: Octadecyldimethylchlorosilane

Chlorodimethyl-n-octadecylsilane is used for preparation of hydrophobic surfaces and chain terminator. This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.

Alkyl Silane - Conventional Surface Bonding Aliphatic, fluorinated aliphatic or substituted aromatic hydrocarbon substituents are the hydrophobic entities which enable silanes to induce surface hydrophobicity. The organic substitution of the silane must be non-polar. The hydrophobic effect of the organic substitution can be related to the free energy of transfer of hydrocarbon molecules from an aqueous phase to a homogeneous hydrocarbon phase. A successful hydrophobic coating must eliminate or mitigate hydrogen bonding and shield polar surfaces from interaction with water by creating a non-polar interphase. Although silane and silicone derived coatings are in general the most hydrophobic, they maintain a high degree of permeability to water vapor. This allows coatings to breathe and reduce deterioration at the coating interface associated with entrapped water. Since ions are not transported through non-polar silane and silicone coatings, they offer protection to composite structures ranging from pigmented coatings to rebar reinforced concrete. A selection guide for hydrophobic silanes can be found on pages 22-31 of the Hydrophobicity, Hydrophilicity and Silane Surface Modification brochure. n-Octadecyldimethylchlorosilane; Dimethyl-n-octadecylchlorosilane; Chlorodimethyloctadecylsilane; Chlorodimethylsilyl-n-octadecane Contains 5-10% C18 isomersEmployed in bonded HPLC reverse phases

Dimethyloctadecylchlorosilane (DMOD) is a redox-active molecule that has been used in various analytical techniques, including magnetic particle chromatography, water vapor sorption analysis, and cyclic peptide synthesis. DMOD is an acid with a pKa of 3.7. It has been shown to react with hydrochloric acid to form chlorosilanes, which are volatile compounds that can be detected by gas chromatography or photomultiplier tubes. The compound has also been used in wastewater treatment and cell culture experiments, where it facilitates the immobilization of cells on surfaces and prevents their detachment from the surface.

Alkyl Silane - Conventional Surface Bonding Aliphatic, fluorinated aliphatic or substituted aromatic hydrocarbon substituents are the hydrophobic entities which enable silanes to induce surface hydrophobicity. The organic substitution of the silane must be non-polar. The hydrophobic effect of the organic substitution can be related to the free energy of transfer of hydrocarbon molecules from an aqueous phase to a homogeneous hydrocarbon phase. A successful hydrophobic coating must eliminate or mitigate hydrogen bonding and shield polar surfaces from interaction with water by creating a non-polar interphase. Although silane and silicone derived coatings are in general the most hydrophobic, they maintain a high degree of permeability to water vapor. This allows coatings to breathe and reduce deterioration at the coating interface associated with entrapped water. Since ions are not transported through non-polar silane and silicone coatings, they offer protection to composite structures ranging from pigmented coatings to rebar reinforced concrete. A selection guide for hydrophobic silanes can be found on pages 22-31 of the Hydrophobicity, Hydrophilicity and Silane Surface Modification brochure. n-Octadecyldimethylchlorosilane; Dimethyl-n-octadecylchlorosilane; Chlorodimethyloctadecylsilane; Chlorodimethylsilyl-n-octadecane Contains 5-10% C18 isomers70% in toluene

Alkyl Silane - Conventional Surface Bonding Aliphatic, fluorinated aliphatic or substituted aromatic hydrocarbon substituents are the hydrophobic entities which enable silanes to induce surface hydrophobicity. The organic substitution of the silane must be non-polar. The hydrophobic effect of the organic substitution can be related to the free energy of transfer of hydrocarbon molecules from an aqueous phase to a homogeneous hydrocarbon phase. A successful hydrophobic coating must eliminate or mitigate hydrogen bonding and shield polar surfaces from interaction with water by creating a non-polar interphase. Although silane and silicone derived coatings are in general the most hydrophobic, they maintain a high degree of permeability to water vapor. This allows coatings to breathe and reduce deterioration at the coating interface associated with entrapped water. Since ions are not transported through non-polar silane and silicone coatings, they offer protection to composite structures ranging from pigmented coatings to rebar reinforced concrete. A selection guide for hydrophobic silanes can be found on pages 22-31 of the Hydrophobicity, Hydrophilicity and Silane Surface Modification brochure. n-Octadecyldimethylchlorosilane; Dimethyl-n-octadecylchlorosilane; Chlorodimethyloctadecylsilane; Chlorodimethylsilyl-n-octadecane Contains <5% C18 isomersEmployed in bonded HPLC reverse phases

Chlorodimethyl(Octadecyl)Silane