Agent Name

Octadecyltrichlorosilane

CAS Number

112-04-9

Formula

C18-H37-Cl3-Si

Major Category

Toxic Gases & Vapors

Synonyms

Silane, octadecyltrichloro-; Silane, trichlorooctadecyl-; Trichloro(octadecyl)silane; [ChemIDplus] n-Octadecyltrichlorosilane; Octadeciltriclorosilano (Spanish DOT); Octadecyltrichlorosilane (French DOT); OTS; Stearyltrichlorosilane; Trichlorooctadecylsilane; [CAMEO] UN1800

Category

Chlorosilanes

Description

Colorless liquid with a pungent odor; [CAMEO]

Sources/Uses

Used as an intermediate for silicones; [HSDB]

Comments

Reacts violently with water, steam, or moisture evolving heat, hydrogen gas (combustible), and hydrogen chloride gas (corrosive); Produces hydrogen chloride gas on contact with air; Corrosive to tissue; [CAMEO] Can cause second- and third-degree burns from brief contact; Vapors are severely irritating to eyes and throat and may cause injury to eyes and lungs; [HSDB] Reacts violently with water; Causes burns; Inhalation may cause corrosive injuries to upper respiratory tract and lungs; [Sigma-Aldrich MSDS]

Exposure Assessment
Dangerous When Wet

Yes - A material that, by contact with water, is liable to become spontaneously flammable or to give off flammable or toxic gas at a rate greater than 1 L per kilogram of the material, per hour; [ERG 2004]

Vapor Pressure

9.92E-6 mm Hg

Flammability (NFPA)

2: High ambient temperature required

Adverse Effects
Toxic Pneumonitis

Yes

Dermatotoxin

Skin Burns

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