Melting point :-44 °C
Boiling point :168 °C(lit.)
Density :0.876 g/mL at 20 °C(lit.)
vapor density :4.1 (vs air)
vapor pressure :4.5 mm Hg ( 37.7 °C)
refractive index :n20/D 1.504(lit.)
Flash point :120 °F
storage temp. :Store below +30°C.
solubility :0.057g/l
pka :>14 (Schwarzenbach et al., 1993)
form :Liquid
color :Clear colorless
Odor :char. aromatic odor
explosive limit :0.8-7%(V)
Odor Threshold :0.12ppm
Water Solubility :Soluble in alcohol, benzene and ether. Slightly soluble in water
Merck :14,7915
BRN :1903005
Henry's Law Constant :6.946, 11.202, and 15.702 at 27.0, 35.0, and 45.0 °C, respectively (dynamic headspace, Hansen et al., 1995)
Exposure limits :NIOSH REL: TWA 25 ppm (125 mg/m³); ACGIH TLV: TWA for mixed isomers 25 ppm (adopted).
Dielectric constant :2.4（16℃）
Stability :Stable. Incompatible with strong oxidizing agents. Flammable. May form explosive mixtures with air.
InChIKey :GWHJZXXIDMPWGX-UHFFFAOYSA-N
LogP :3.630
CAS DataBase Reference :95-63-6(CAS DataBase Reference)
EPA Substance Registry System :1,2,4-Trimethylbenzene (95-63-6)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H226 Flammable liquid and vapour Flammable liquids Category 3 Warning H304 May be fatal if swallowed and enters airways Aspiration hazard Category 1 Danger H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362 H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P H332 Harmful if inhaled Acute toxicity,inhalation Category 4 Warning P261, P271, P304+P340, P312 H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning H411 Toxic to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 2
Precautionary statements:	P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P273 Avoid release to the environment. P302+P352 IF ON SKIN: wash with plenty of soap and water. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.