cis-1,2-Dichloroethylene

  • (Z)-1,2-Dichloroethylene
  • 1,2-cis-Dichloroethene
  • cis-1,2-Dichlorethylene
  • cis-Dichloroethene
  • HCC 1130c
Formula
C2H2Cl2
Structure
Description
Clear colorless liquid with a pleasant odor.
Uses
Solvent (as isomeric mixt) for perfumes, dyes, & lacquers.

Registry Numbers and Inventories.
CAS
156-59-2
EC (EINECS/ELINCS)
205-859-7
EC Index Number
602-026-00-3
EC Class
Highly flammable; Harmful; Dangerous for the Environment
RTECS
KV9420000
RTECS class
Mutagen
UN (DOT)
1150
Beilstein/Gmelin
82639
Beilstein Reference
5-23-06-00096
RCRA
U079
Canada DSL/NDSL
NDSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C2H2Cl2
Formula mass
96.94
Melting point, °C
9.5
Boiling point, °C
60
Vapor pressure, mmHg
333 (25 C)
Vapor density (air=1)
3.34
Critical temperature
271
Critical pressure
6.0
Density
1.282 g/cm3
Solubility in water
Slightly soluble
Viscosity
0.48 cp at 20C
Surface tension
28x10-3 n/m @ 20 C
Refractive index
1.544 (20 C)
Partition coefficient, pKow
1.86
Heat of vaporization
27.9 kJ/mol

Hazards and Protection.
Storage
Keep away from heat, sparks, and flame. Keep away from sources of ignition. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Flammables-area.
Handling
Wash thoroughly after handling. Use only in a well ventilated area. Ground and bond containers when transferring material. Use spark-proof tools and explosion proof equipment. Avoid contact with eyes, skin, and clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Avoid contact with heat, sparks and flame. Avoid ingestion and inhalation. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Remove all sources of ignition. Use a spark-proof tool.
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Potassium hydroxide, sodium, sodium hydroxide, strong oxidizing agents, bases, Reaction with solid caustic alkalies or concentrated solution produces chloracetylene gas which ignites spontaneously in air..
Decomposition
Hydrogen chloride, phosgene, carbon monoxide, carbon dioxide.

Fire.
Flash Point,°C
4
Autoignition, °C
460
Upper exp. limit, %
12.8
Lower exp. limit, %
5.6
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Extinguishing media: Use water spray to cool fire-exposed containers. In case of fire use water spray, dry chemical, carbon dioxide, or appropriate foam.
Fire potential
Flammable, dangerous fire hazard.
Hazards
Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers.
Combustion products
Phosgene and hydrogen chloride fumes may form in fires..
Health
2
 
Flammability
3
 
 
Reactivity
2
 

Health.
Exposure effects
The toxological properties of this substance have not been fully investigated.
   Ingestion
May cause gastrointestinal irritation with nausea, vomiting and diarrhea.
   Inhalation
Inhalation of high concentrations may cause central nervous system effects characterized by headache, dizziness, unconsciousness and coma. May cause respiratory tract irritation. Inhalation of high concentrations may cause narcotic effects.
   Skin
May cause skin irritation. May cause dermatitis.
   Eyes
May cause eye irritation.

First aid
 
   Ingestion
If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
   Skin
Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.
UN number
1150
Response guide
Hazard class
3
Packing Group
II
 
USCG CHRIS Code
CLF
 
36 Halogenated hydrocarbons