CAS 3069-42-9: Octadecyltrimethoxysilane

Description: Octadecyltrimethoxysilane, with the CAS number 3069-42-9, is an organosilane compound characterized by its long hydrophobic alkyl chain and three methoxy groups attached to a silicon atom. This structure imparts unique properties, making it an effective silane coupling agent and surface modifier. It is typically a colorless to pale yellow liquid with a relatively low viscosity. The presence of the long octadecyl chain enhances its hydrophobicity, allowing it to form self-assembled monolayers on various substrates, which can improve surface properties such as water repellency and chemical resistance. Octadecyltrimethoxysilane is commonly used in applications such as coatings, adhesives, and sealants, as well as in the modification of silica and other inorganic materials to enhance compatibility with organic polymers. Additionally, it can facilitate the bonding of organic materials to inorganic surfaces, making it valuable in various industrial and research applications. Proper handling and storage are essential, as it can react with moisture, leading to the release of methanol.

Formula: C₂₁H₄₆O₃Si

InChI: InChI=1S/C21H46O3Si/c1-5-6-7-8-9-10-11-12-13-14-15-16-17-18-19-20-21-25(22-2,23-3)24-4/h5-21H2,1-4H3

InChI key: InChIKey=SLYCYWCVSGPDFR-UHFFFAOYSA-N

SMILES: O(C)[Si](OC)(OC)CCCCCCCCCCCCCCCCCC

Synonyms:

• Ay 43-218Mc
• Dynasylan 9118
• Kh 311
• Lsx 6817
• M 1 (silane)
• O 0256
• Octadecyltrimethoxysilane
• Silane, trimethoxyoctadecyl-
• Stearyltrimethoxysilane
• Tsl 8185
• Tsl 8186
• n-Octadecyltrimethoxysilane
• Trimethoxyoctadecylsilane
• Trimethoxyoctadecylsilane

Octadecyltrimethoxysilane

CAS: 3069-42-9

• Formula: C₂₁H₄₆O₃Si
• Purity: >85.0%(GC)
• Color and Shape: White or Colorless to Light yellow powder to lump to clear liquid
• Molecular weight: 374.68

Octadecyltrimethoxysilane

CAS: 3069-42-9

• Formula: C₂₁H₄₆O₃Si
• Purity: 90%
• Color and Shape: Liquid
• Molecular weight: 374.6736400000001

Octadecyltrimethoxysilane, 90%, Tech.

CAS: 3069-42-9

This Thermo Scientific Chemicals brand product was originally part of the Acros Organics product portfolio. …

• Formula: C₂₁H₄₆O₃Si
• Purity: 90%
• Color and Shape: Liquid, Clear to slightly hazy colorless to light yellow, May partially crystallize, May develop some turbidity or precipitate
• Molecular weight: 374.68

N-Octadecyltrimethoxysilane, includes up to 5-10% C18 Isomers

CAS: 3069-42-9

S12325 - n-Octadecyltrimethoxysilane, includes up to 5-10% C18 Isomers

• Formula: C₂₁H₄₆O₃Si
• Purity: 95%
• Color and Shape: Liquid, Clear to straw liquid
• Molecular weight: 374.6809997558594

Trimethoxy(octadecyl)silane

CAS: 3069-42-9

• Formula: C₂₁H₄₆O₃Si
• Purity: Tech
• Color and Shape: clear. almost colourless low melting solid or liquid
• Molecular weight: 374.67g/mol

Octadecyltrimethoxysilane (>85%)

CAS: 3069-42-9

Applications OCTADECYLTRIMETHOXYSILANE (cas# 3069-42-9) is a useful research chemical.

• Formula: C₂₁H₄₆O₃Si
• Purity: >85%
• Color and Shape: Neat
• Molecular weight: 374.67

n-OCTADECYLTRIMETHOXYSILANE

CAS: 3069-42-9

Alkyl Silane - Conventional Surface Bonding Aliphatic, fluorinated aliphatic or substituted aromatic hydrocarbon substituents are …

• Formula: C₂₁H₄₆O₃Si
• Purity: 92% including isomers
• Color and Shape: Straw Liquid
• Molecular weight: 374.68

Octadecyl-trimethoxysilane

CAS: 3069-42-9

Octadecyl-trimethoxysilane (OTMS) is a chemical compound that is stable in air, water, and most organic …

• Formula: C₂₁H₄₆O₃Si
• Purity: Min. 95%
• Molecular weight: 374.67 g/mol