Octadecyltrimethoxysilane CAS 3069-42-9

Product Name: Octadecyltrimethoxysilane
CAS: 3069-42-9
MF: C21H46O3Si
MW: 374.67
EINECS: 221-339-2
Melting point: 16-17 °C
Boiling point: 170 °C
Density: 0.883 g/mL

Purity:≥99%

Colorless and transparent liquid

1. Octadecyltrimethoxysilane CAS 3069-42-9 is used as a long-chain alkyl silane coupling agent and surface modifier to impart hydrophobicity to glass, silica, metals, and powder fillers, improving their compatibility with organic resins .
2. Octadecyltrimethoxysilane CAS 3069-42-9 serves in the preparation of superhydrophobic composite coatings by modifying silicon dioxide in ethanol solution .
3. Octadecyltrimethoxysilane CAS 3069-42-9 is employed to form self-assembled monolayers (SAMs) for high-contrast patterned adsorption of proteins and for surface modification of magnetic nanoparticles in analytical applications .

1. Store Octadecyltrimethoxysilane CAS 3069-42-9 in a tightly closed container in a dry, cool, and well-ventilated place, away from heat and sources of ignition .
2. Octadecyltrimethoxysilane CAS 3069-42-9 is moisture-sensitive and should be stored under an inert atmosphere (e.g., nitrogen) to prevent hydrolysis.
3. Keep Octadecyltrimethoxysilane CAS 3069-42-9 away from strong oxidizing agents, acids, alkali metals, and moisture .

1. Octadecyltrimethoxysilane CAS 3069-42-9 causes skin irritation (H315) according to GHS classification .
2. Octadecyltrimethoxysilane CAS 3069-42-9 causes serious eye irritation (H319) .
3. Octadecyltrimethoxysilane CAS 3069-42-9 may cause respiratory irritation (H335) upon inhalation .

1. Octadecyltrimethoxysilane CAS 3069-42-9 is classified as a warning-level hazard (GHS07) with the signal word Warning under GHS .
2. Octadecyltrimethoxysilane CAS 3069-42-9 requires protective equipment including safety goggles with side shields, chemical-resistant gloves (e.g., nitrile rubber), and a lab coat, and should be handled in a chemical fume hood .
3. Octadecyltrimethoxysilane CAS 3069-42-9 must not be released into drains or the environment; spills should be absorbed with dry inert material such as sand or vermiculite and placed in a suitable container for disposal as hazardous waste .

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