Agent Name

Methyldichlorosilane

CAS Number

75-54-7

Formula

C-H4-Cl2-Si

Major Category

Toxic Gases & Vapors

Synonyms

Dichlorohydridomethylsilicon; Dichloromethylsilane; Methyl-dichlorsilan [Czech]; Monomethyldichlorosilane; Silane, dichloromethyl-; [ChemIDplus] UN1242; UN2985

Category

Chlorosilanes

Description

Colorless liquid with pungent odor; [ICSC]

Sources/Uses

Used to waterproof and improve wear resistance of textiles; Also used as a monomer for silicone fluids; [HSDB]

Comments

Corrosive to skin; [Quick CPC] A corrosive substance that can cause pulmonary edema; [ICSC] Can cause severe burn to eyes and skin; [HSDB] Water reactive and highly flammable; [CAMEO]

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

429 mm Hg

Lethal Concentration

LC50 (rat) = 300 ppm/4h

Explanatory Notes

Flash point = -14 deg F; [CAMEO]

Flammability (NFPA)

3: May ignite at ambient temperature

Adverse Effects
Toxic Pneumonitis

Yes

Dermatotoxin

Skin Burns

Links to Other NLM Databases
Health Studies

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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: