IUPAC Name: (E)-1,2-Dichloroethene 
Molecular Weight: 96.94328 g/mol
Molecular Formula: C₂H₂Cl₂ 
Density: 1.243 g/cm³ 
Melting Point: −57 °C(lit.)
Boiling Point: 47.7 °C at 760 mmHg 
Flash Point: 6.1 °C
Index of Refraction: 1.453
Molar Refractivity: 21.07 cm³
Molar Volume: 77.9 cm³
Surface Tension: 25.9 dyne/cm 
Enthalpy of Vaporization: 27.93 kJ/mol
Vapour Pressure: 333 mmHg at 25 °C 
Exact Mass: 95.953355
EINECS: 205-860-2 
Properties: colourless liquid 
Product categories: Organics ; Analytical Chemistry ; Standard Solution of Volatile Organic Compounds for Water , Soil Analysis ; Standard Solutions (VOC) ; Alpha Sort ; D ; DAlphabetic ; DIA - DIC ; Volatiles/ Semivolatiles 
Mmolecular structure of  trans-1,2-Dichloroethylene (CAS NO.156-60-5):

Reported in EPA TSCA Inventory.

Moderately toxic by ingestion. Mildly toxic by inhalation. Human systemic effects by inhalation: sleep, hallucinations, and distorted perceptions. Experimental reproductive effects. A skin and eye irritant. Mutation data reported. Exposure to high vapor concentration can cause nausea, vomiting, weakness, tremor, and cramps. Recovery is usually prompt following removal from exposure. Dermatitis may result from defatting action on skin. Dangerous fire hazard when exposed to heat, flame, or oxidizers. Moderate explosion hazard in the form of vapor when exposed to flame. Violent reaction with difluoromethylene dihypofluorite. Forms shock-sensitive explosive mixtures with dinitrogen tetraoxide. Reaction with solid caustic alkalies or their concentrated solutions produces chloracetylene gas that ignites spontaneously in air. Reacts violently with N₂O₄, KOH, Na, NaOH. Moderate explosion hazard in the form of vapor when exposed to flame. Can react vigorously with oxidizing materials. To fight fire, use water spray, foam, CO₂, dry chemical. When heated to decomposition it emits toxic fumes of Cl⁻. See also CHLORIDES; CHLORINATED HYDROCARBONS, ALIPHATIC; and ACETYLENE COMPOUNDS and ALKYNES.
Hazard Codes: F, Xn, T
Risk Statements: 11-20-52/53-39/23/24/25-23/24/25 
R11: Highly flammable. 
R20: Harmful by inhalation. 
R52/53: Harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment. 
R39: Danger of very serious irreversible effects. 
R23/24/25: Toxic by inhalation, in contact with skin and if swallowed.
Safety Statements: 7-16-29-61-45-36/37 
S7: Keep container tightly closed. 
S16: Keep away from sources of ignition. 
S29: Do not empty into drains. 
S61: Avoid release to the environment. Refer to special instructions / safety data sheets. 
S45: In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) 
S36/37: Wear suitable protective clothing and gloves.
RIDADR: UN 1150 3/PG 2
WGK Germany: 2
RTECS: KV9400000
HazardClass: 3
PackingGroup: II

DFG MAK: 200 ppm (800 mg/m³)

The chemical synonyms of trans-1,2-Dichloroethylene (CAS NO.156-60-5) are (E)-1,2-Dichloroethene ; (E)-1,2-Dichloroethylene ; 4-01-00-00709 (Beilstein Handbook Reference) ; AI3-28786 ; BRN 1420761 ; CCRIS 2505 ; Ethylene, 1,2-dichloro-, trans- ; HCC 1130t ; HSDB 6361 ; NSC 60512 ; R 1130t ; RCRA waste number U079 ; trans-Acetylene dichloride ; trans-Dichloroethylene . It is highly flammable. Oxidizes in air to form unstable peroxides that may explode spontaneously. Avoid contact with copper and copper alloys. trans-1,2-Dichloroethylene reacts with alkalis, difluoromethylene, dihypofluorite, and nitrogen tetraoxide. Contact with solid alkalis or their concentrated solutions will cause formation of chloroacetylene, which ignites in air. Corrosive to metals unless an inhibitor has been added. Oxidation in the presence of concentrated sulfuric acid or a free radical initiator gives chloroacetyl chloride via epoxide intermediates. It is incompatible with organic peroxides.