Melting point :-15 °C
Boiling point :179 °C
Density :1.306 g/mL at 25 °C(lit.)
vapor density :5.1 (vs air)
vapor pressure :1.2 mm Hg ( 20 °C)
refractive index :n20/D 1.551
Flash point :150 °F
storage temp. :Store below +30°C.
solubility :0.13g/l
form :Liquid
color :Clear colorless to very slightly yellow
Odor :Aromatic; characteristic aromatic.
explosive limit :2.2-12%(V)
Water Solubility :0.13 g/L (20 ºC)
λmax :λ: 296 nm Amax: 1.00
λ: 300 nm Amax: 0.30
λ: 305 nm Amax: 0.20
λ: 335 nm Amax: 0.05
λ: 375-400 nm Amax: 0.01 Merck :14,3056
BRN :606078
Henry's Law Constant :1.92 at 25 °C (gas stripping-GC, Shiu and Mackay, 1997)
Exposure limits :Ceiling 50 ppm (～300 mg/m³) (MSHA, OSHA, and NIOSH); IDLH 1700 ppm (NIOSH).
Dielectric constant :7.5（20℃）
Stability :Stable, but possibly light sensitive. Combustible. Incompatible with oxidizing agents, aluminium, aluminium alloys. Attacks some rubbers and plastics.
LogP :3.433 at 25℃
CAS DataBase Reference :95-50-1(CAS DataBase Reference)
IARC :3 (Vol. Sup 7, 73) 1999
NIST Chemistry Reference :Benzene, 1,2-dichloro-(95-50-1)
EPA Substance Registry System :o-Dichlorobenzene (95-50-1)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H225 Highly Flammable liquid and vapour Flammable liquids Category 2 Danger P210,P233, P240, P241, P242, P243,P280, P303+ P361+P353, P370+P378,P403+P235, P501 H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P H336 May cause drowsiness or dizziness Specific target organ toxicity,single exposure; Narcotic effects Category 3 Warning P261, P271, P304+P340, P312,P403+P233, P405, P501 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. P233 Keep container tightly closed. P240 Ground/bond container and receiving equipment. P241 Use explosion-proof electrical/ventilating/lighting/…/equipment. P273 Avoid release to the environment. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.