Agent Name

Dimethyldichlorosilane

CAS Number

75-78-5

Formula

C2-H6-Cl2-Si

Major Category

Toxic Gases & Vapors

Synonyms

Dichlorodimethylsilane; Dichlorodimethylsilicon; Dimethyl-dichlorsilan [Czech]; Dimethylsilane dichloride; Inerton AW-DMCS; Inerton DW-DMC; LS 130; Repel-Silan; Silane, dichlorodimethyl-; [ChemIDplus] UN1162

Category

Chlorosilanes

Description

Clear liquid with a pungent odor; [CAMEO] Colorless liquid with an acrid odor; [MSDSonline]

Sources/Uses

Used to make silicone products; Also used in the ethchlorvynol assay and as a reagent for gas chromatography; [HSDB]

Comments

Evolves HCl when spilled in water; [ERG] Capable of causing second and third degree burns to eyes and skin; A severe mucous membrane and respiratory tract irritant; [HSDB] A corrosive substance that can cause pulmonary edema; [ICSC] Reacts with water; A corrosive substance that can cause injury to the skin, eyes, and respiratory tract; Inhalation may cause chemical pneumonitis; [MSDSonline] In lethal concentration studies, causes labored breathing, corneal opacities, and lung damage; [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 = 2 ppm

Vapor Pressure

144 mm Hg

Lethal Concentration

LC50 (rat) = 930 ppm/4h

Explanatory Notes

Flash point = -8.9 deg C; [Hawley]

Flammability (NFPA)

3: May ignite at ambient temperature

Adverse Effects
Toxic Pneumonitis

Yes

Dermatotoxin

Skin Burns

Links to Other NLM Databases
Health Studies

Human Health Effects from Hazardous Substances Data Bank:

Toxicity Information

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Chemical Information

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Related Information in HazMap
Diseases

Occupational diseases associated with exposure to this agent:

Processes

Industrial Processes with risk of exposure: