Agent Name

Silicon tetrachloride

CAS Number

10026-04-7

Formula

Cl4-Si

Major Category

Toxic Gases & Vapors

Synonyms

Chlorid kremicity [Czech]; Silane, tetrachloro-; Silicio(tetracloruro di); Silicium(tetrachlorure de) [French]; Siliciumtetrachlorid [German]; Siliciumtetrachloride [Dutch]; Silicon chloride (SiCl4); Tetrachlorosilane; Tetrachlorosilicon; Tetrachlorure de silicium [French]; UN1818; [ChemIDplus]

Category

Chlorosilanes

Description

Colorless fuming liquid with a suffocating odor; [HSDB]

Sources/Uses

Used to produce military smokescreens; Used to manufacture silicones, fused silica glass, fumed silica, silica fiber optic waveguides, transistors, and other chemical products; [HSDB]

Comments

Decomposes in water to release hydrochloric acid; [Merck Index # 8500] Contact can cause severe burns to skin and eyes; Inhalation can cause pulmonary edema; [CAMEO] Silicon tetrachloride is a skin irritant. [Quick CPC] Corrosive to rabbit skin when applied undiluted; In a spill accident, several people were treated for burning of the eyes and respiratory tract; in most cases, symptoms cleared within 24 hours; [AIHA]

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]

WEEL

Ceiling = 1 ppm

Vapor Pressure

236 mm Hg

Lethal Concentration

LC50 (rat) = 8,000 ppm/4H

Explanatory Notes

Boiling Point = 135.7 degrees F; [CAMEO]

Adverse Effects
Toxic Pneumonitis

Yes

Dermatotoxin

Skin Burns

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Diseases

Occupational diseases associated with exposure to this agent:

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