Agent Name

Boron trichloride

CAS Number

10294-34-5

Formula

B-Cl3

Major Category

Toxic Gases & Vapors

Synonyms

Boron chloride (BCl3); Chlorure de bore (French); Trichloroborane; Trichloroboron; Borane, trichloro-; [ChemIDplus] UN1741

Category

Corrosive Gases

Description

Gas or colorless, fuming liquid with a pungent odor; bp = 12.5 deg C; [ICSC]

Sources/Uses

Used in semiconductor manufacturing and in boron production; also used as a catalyst, soldering flux, and metal refining agent; [HSDB]

Comments

Corrosive to skin; [Quick CPC] A corrosive substance that can cause injury to skin, eyes, and respiratory tract; Rapidly evaporating liquid can cause frostbite; High inhalation exposure can cause pulmonary edema; [ICSC] Reacts violently with water evolving hydrochloric acid and boric acid; Also forms hydrochloric acid on contact with moisture in air and soil; Corrosive and toxic; [CAMEO] Reacts violently with water producing a visible vapor cloud; Short-term exposure causes second- and third-degree skin burns and severe eye injury; Inhalation can cause edema and severe upper respiratory tract irritation; Vapors are intolerable even at low concentrations; [CHRIS]

Exposure Assessment
TIH

Yes

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]

Ceiling (ACGIH)

0.7 ppm

Lethal Concentration

LC50 (rat) = 2,541 ppm/1hr

Reference Link

ICSC: Boron trichloride

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: