Agent Name

Trimethyl borate

CAS Number

121-43-7

Formula

C3-H9-B-O3

Major Category

Metals

Synonyms

Borester O; Boric acid (H3BO3), trimethyl ester; Boric acid, trimethyl ester; Methyl borate; Trimethoxyborane; Trimethoxyborine; Trimethoxyboron; Trimethylester kyseliny borite [Czech]; UN2416; [ChemIDplus]

Category

Metalloid Compounds (Boron)

Description

Colorless liquid; [ICSC]

Sources/Uses

Used as a flame retardant, welding and brazing flux, chemical intermediate, fungicide, and a solvent for waxes, resins, and oils; [HSDB]

Comments

A skin and eye irritant; Inhalation may cause cough and sore throat; [ICSC] Chronic poisoning in grazing animals where soil is high in boric acid results in vomiting, diarrhea, shock, convulsions, and paralysis; Post-mortem findings include inflammation of the GI tract, liver and kidney damage, and cerebral edema; [HSDB]

Exposure Assessment
Vapor Pressure

137 mm Hg

Flammability (NFPA)

3: May ignite at ambient temperature

Adverse Effects
Neurotoxin

Other CNS Neurotoxin

Hepatotoxin

Hepatotoxin, Secondary

Links to Other NLM Databases
Health Studies

Human Health Effects from Hazardous Substances Data Bank:

Toxicity Information

Search TOXNET

Chemical Information

Search ChemIDplus

Related Information in HazMap
Processes

Industrial Processes with risk of exposure: