Agent Name

Mesitylene

Alternative Name

1,3,5-Trimethylbenzene

CAS Number

108-67-8

Formula

C9-H12

Major Category

Solvents

Synonyms

3,5-Dimethyltoluene; Benzene, 1,3,5-trimethyl-; Fleet-X; TMB; Trimethylbenzol; sym-Trimethylbenzene; 1,3,5-Trimethylbenzene; [ChemIDplus] UN2325

Category

Aromatic Solvents

Description

Colorless liquid; [ICSC]

Sources/Uses

Found in coal tar and petroleum crudes; [Merck Index] Used to make dyes and UV oxidation stabilizers for plastics; Also used as a solvent and paint thinner; [HSDB]

Comments

A skin, eye, nose, throat and respiratory tract irritant; [Merck Index] A skin, eye, and respiratory tract irritant; Defats the skin; May have effects on the central nervous system and blood; [ICSC] A skin, eye, and respiratory tract irritant; [HSDB] A nose, throat, and lung irritant; Inhalation of high concentrations can cause CNS depression; [CHEMINFO] A respiratory tract irritant; [eChemPortal: ESIS] See "Trimethyl benzene isomers."

Exposure Assessment
MAK

20 ppm

Vapor Pressure

2.48 mm Hg

Odor Threshold Low

2 ppm

Lethal Concentration

LC50 (rat) = 24,000 mg/m3/4h

Explanatory Notes

Odor threshold (recognition) from CHEMINFO;

Adverse Effects
Neurotoxin

CNS Solvent Syndrome

Links to Other NLM Databases
Health Studies

Human Health Effects from Hazardous Substances Data Bank:

Toxicity Information

Search TOXNET

Chemical Information

Search ChemIDplus

Biomedical References

Search PubMed

Related Information in HazMap
Diseases

Occupational diseases associated with exposure to this agent:

Processes

Industrial Processes with risk of exposure: