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)
Thermal Conductivity :0.125 W/(m·K) at 25 ℃
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.
InChI :1S/C6H4Cl2/c7-5-3-1-2-4-6(5)8/h1-4H
InChIKey :RFFLAFLAYFXFSW-UHFFFAOYSA-N
SMILES :Clc1ccccc1Cl
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 H227 Combustible liquid Flammable liquids Category 4 Warning P210, P280, P370+P378, P403+P235,P501 H302 Harmful if swallowed Acute toxicity,oral Category 4 Warning P264, P270, P301+P312, P330, P501 H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362 H317 May cause an allergic skin reaction Sensitisation, Skin Category 1 Warning P261, P272, P280, P302+P352,P333+P313, P321, P363, P501 H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P H331 Toxic if inhaled Acute toxicity,inhalation Category 3 Danger P261, P271, P304+P340, P311, P321,P403+P233, P405, P501 H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning 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 H341 Suspected of causing genetic defects Germ cell mutagenicity Category 2 Warning P201,P202, P281, P308+P313, P405,P501 H370 Causes damage to organs Specific target organ toxicity, single exposure Category 1 Danger P260, P264, P270, P307+P311, P321,P405, P501 H372 Causes damage to organs through prolonged or repeated exposure Specific target organ toxicity, repeated exposure Category 1 Danger P260, P264, P270, P314, P501 H410 Very toxic to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 1 Warning P273, P391, P501
Precautionary statements:	P201 Obtain special instructions before use. P202 Do not handle until all safety precautions have been read and understood. P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P260 Do not breathe dust/fume/gas/mist/vapours/spray. P264 Wash hands thoroughly after handling. P264 Wash skin thouroughly after handling. P270 Do not eat, drink or smoke when using this product. P271 Use only outdoors or in a well-ventilated area. P272 Contaminated work clothing should not be allowed out of the workplace. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. 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. P333+P313 IF SKIN irritation or rash occurs: Get medical advice/attention. P337+P313 IF eye irritation persists: Get medical advice/attention. P370+P378 In case of fire: Use … for extinction. P391 Collect spillage. Hazardous to the aquatic environment P403+P233 Store in a well-ventilated place. Keep container tightly closed. P403+P235 Store in a well-ventilated place. Keep cool. P405 Store locked up. P501 Dispose of contents/container to..…