Agent Name

Methyl aluminum sesquibromide

CAS Number

12263-85-3

Formula

C3-H9-Al2-Br3

Major Category

Metals

Synonyms

Aluminum, tribromotrimethyldi-; Methylaluminum sesquibromide; Tribromotrimethyldialuminum; [ChemIDplus] UN3051

Category

Metals, Organic Compounds

Description

Cloudy yellow liquid; [HSDB]

Sources/Uses

Used as catalyst for polymerization of olefins and hydrogenation of aromatics; [HSDB] Organic aluminum compounds are "some of the most important, highest volume, highest value organometallic compounds in production." [Ullmann]

Comments

Aluminum alkyl halides release large amounts of HCl when spilled in water; [ERG 2012] Produces hydrogen bromide when decomposes; [Sax] Reacts violently with water and air; Organoaluminum compounds are corrosive; Harmful if absorbed through the skin or inhaled; The butyl alkyls and below are pyrophoric; Aluminum alkyls are eye irritants; [HSDB] Organic aluminum compounds can cause irritation or burns, depending upon concentration; [Ullmann] TLV withdrawn for aluminum alkyls because of inadequate toxicological data; [ACGIH] See "Aluminum." See "ORGANOMETALS."

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]

Explanatory Notes

The Guide in the Emergency Response Guidebook is for "Aluminum alkyls."

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

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Related Information in HazMap
Diseases

Occupational diseases associated with exposure to this agent:

Processes

Industrial Processes with risk of exposure: