Agent Name

Dichlorosilane

CAS Number

4109-96-0

Formula

Cl2-H2-Si

Major Category

Toxic Gases & Vapors

Synonyms

DCS; Silane, dichloro-; Silicon chloride hydride; [ChemIDplus] UN2189

Category

Chlorosilanes

Description

A flammable and poisonous gas, with a strong repulsive odor; [CAMEO] Vapor density = 3.48 (heavier than air); [Burke, p. 101]

Comments

Extremely flammable; Reacts with water to release HCl; Corrosive to skin and can produce pneumonitis after inhalation; [CSH, p. 168] Corrosive to skin; [Quick CPC] A corrosive substance that can cause injury to the skin, eyes, and respiratory tract; Tear drawing; Inhalation of high concentrations may cause pulmonary edema; Evaporating liquid can cause frostbite; [ICSC]

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]

Lethal Concentration

LC50 (rat) = 215 ppm

Flammability (NFPA)

4: Burns readily

Adverse Effects
Lacrimator

Yes

Toxic Pneumonitis

Yes

Dermatotoxin

Skin Burns

Links to Other NLM Databases
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: