Solvents
REACH
trans-1,2-dichloroethylene
CAS Number
156-60-5
EC Number
205-860-2
What is trans-1,2-dichloroethylene?
Trans-1,2-dichloroethylene (CAS 156-60-5), also known as trans-acetylene dichloride, is a chlorinated solvent used primarily for precision cleaning and degreasing in industrial settings.
Where is trans-1,2-dichloroethylene used?
- Electronics manufacturing: cleaning printed circuit boards and precision components where residue-free surfaces are critical
- Metalworking: degreasing solvent to prepare parts prior to coating, plating, or assembly
- Industrial and institutional cleaning formulations: carrier solvent to improve penetration and evaporation profile of cleaning concentrates
- Specialty lubricant formulations: solvent carrier for active ingredients applied to tight-tolerance mechanical components
- It removes flux residues from sensitive substrates without aggressive chemical attack.
Commercial specifications
- Purity levels typically range from 97% upward, with high-purity grades available for electronics and precision cleaning end uses.
- Technical grade is the primary commercial specification available for industrial solvent applications.
Other Names (Synonyms)
trans-acetylene dichloride|1,2-trans-dichloroethylene|(E)-1,2-dichloroethylene|trans-dichloroethylene|trans-1,2-dichloroethene|Ethene, 1,2-dichloro-, (1E)-|Ethene, 1,2-dichloro-, (E)-|RCRA waste number U079
What are the physical properties of trans-1,2-dichloroethylene?
Melting Point -49.8 °C
Boiling Point 48.7 °C @ Press: 760 Torr
Density 1.2565 g/cm³ @ Temp: 20 °C
Flash Point 43 °F
Appearance 1,2-Dichloroethylene exists in three isomers, sym-, cis-60% and trans-40%. There are variations in toxicity between these two forms. At room temperature, these chemicals are colorless liquids with a slightly acrid, ethereal odor. The Odor Threshold in air is 17 ppm. sym-isomer:
Color Clear colorless
Form Liquid
Water Solubility Miscible with ethanol, ethyl ether, acetone, benzene and chloroform. Immiscible with water.
Vapor Pressure 5.32 psi ( 20 °C)
Refractive Index n 20/D 1.447(lit.)
Log P 2.06
How is trans-1,2-dichloroethylene classified and handled safely? Learn More
Danger
GHS02· Flammable GHS07· Irritant GHS08· Health Hazard
Hazard Statements
H225 Highly Flammable liquid and vapor
H302 Harmful if swallowed
H315 Causes skin irritation
H319 Causes serious eye irritation
Precautionary Statements
P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P233 Keep container tightly closed.
P240 Ground and bond container and receiving equipment.
P241 Use explosion-proof [electrical/ventilating/lighting/…] equipment.
Which trade and regulatory codes apply to trans-1,2-dichloroethylene?
HS Code 29032990
UN Number 1150
ADR Class 3
Packing Group II
Storage Class 3 - Flammable liquids
WGK (Germany) 2