Boron trichloride

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]

Biomedical References

Yes

Yes

0.7 ppm

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

Explanatory Notes

Some “Water Reactive Materials” are also TIH materials themselves: Boron trichloride; [ERG 2016]

Reference Link #2

Yes

Skin burns

Diseases

Occupational diseases associated with exposure to this agent:

• Pneumonitis, toxic

Processes

Industrial Processes with risk of exposure:

• Metal Extraction and Refining
• Semiconductor Manufacturing
• Soldering
• Toxic Gas from Spilling Chemical in Water