Agent Name

Diborane

CAS Number

19287-45-7

Formula

B2-H6

Major Category

Toxic Gases & Vapors

Synonyms

Boroethane; Boron hydride; Diboron hexahydride; Diborane; [ChemIDplus] UN1911

Category

Hydrides

Description

Colorless gas with a repulsive, sweet odor; Note: Usually shipped in pressurized cylinders diluted with hydrogen, argon, nitrogen, or helium; [NIOSH] Vapor density = 0.96 (lighter than air); [HSDB]

Sources/Uses

Used as a rocket fuel, semiconductor doping agent, rubber vulcanizer, reducing agent, and polymerization catalyst; [ACGIH]

Comments

Listed as one of "major irritant airborne toxicants"; [LaDou, p. 563] Animals exposed to high concentrations develop respiratory irritation and pulmonary edema; [ACGIH] Corrosive to the skin and eyes; [ICSC]

Reference Link

ATSDR Medical Management - Diborane

Exposure Assessment
Skin Designation (ACGIH)

Insufficient data

TIH

Yes

TLV (ACGIH)

0.1 ppm

PEL (OSHA)

0.1 ppm

IDLH (NIOSH)

15 ppm

Excerpts from Documentation for IDLHs

Human data: None relevant for use in determining the revised IDLH.

Odor Threshold Low

1.8 ppm

Odor Threshold High

3.5 ppm

Lethal Concentration

LC50 (rat) = 40 ppm/4H

Explanatory Notes

Odor threshold from AIHA; Flash point = -90 deg C;

Reference Link

ICSC: Diborane

Flammability (NFPA)

4: Burns readily

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

Search ChemIDplus

Related Information in HazMap
Diseases

Occupational diseases associated with exposure to this agent:

Processes

Industrial Processes with risk of exposure: