trimethylbenzene Chemical Properties

Melting point:

-68.52°C (estimate)

Boiling point:

159.22°C (estimate)

Density 

0.8803 (estimate)

refractive index 

1.5000 (estimate)

form 

Colorless liquid

EPA Substance Registry System

Trimethylbenzene (25551-13-7)

Safety Information

RIDADR 

2325

OEB

A

OEL

TWA: 25.0 ppm; 125.0 mg/m3

HazardClass 

3.2

PackingGroup 

III

Hazardous Substances Data

25551-13-7(Hazardous Substances Data)

trimethylbenzene Usage And Synthesis

Chemical Properties

Liquid. Insoluble in water.

Uses

Raw material for chemical synthesis.

Uses

As a raw material in chemical syntheses; as ultraviolet stabilizers in plastics; found in solvents and as a constituent of gasoline.

Definition

ChEBI: 1,2,3-trimethylbenzene is a trimethylbenzene carrying methyl groups at positions 1, 2 and 3. It has been found in Centaurium erythraea. It has a role as a neurotoxin and a plant metabolite.

Hazard

Central nervous system impairment, asthma and hematologic effects.

Health Hazard

Trimethyl benzene is an eye, nose, and respiratory irritant; at high concentrations it causes central nervous system depression.

Safety Profile

Mildly toxic by ingestion. A skin and eye irritant. Flammable when exposed to heat, flame, and oxidizers. When heated to decomposition it emits acrid smoke and irritating fumes. See also individual trimethyl benzene isomers.

Toxics Screening Level

The acute initial threshold screening level (ITSL) for all trimethylbenzene (TMB) isomers combined is 1200 μg/m3 with 8-hr averaging time. The chronic ITSL for all TMB isomers combined is 185 μg/m3 with annual averaging time.