trans-1,2-dichloroethylene

CAS Number
156-60-5
EC Number
205-860-2
Chemical Formula
C2H2Cl2
Molecular Weight
96.94 g/mol

Description

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. Its relatively low boiling point and strong solvency make it a practical choice for removing oils and greases. This chemical is highly effective at removing flux residues from sensitive substrates without aggressive chemical attack. In electronics manufacturing, it is used to clean printed circuit boards and precision components where residue-free surfaces are critical to performance.

Metalworking operations use it as a degreasing solvent to prepare parts prior to coating, plating, or assembly. Industrial and institutional cleaning formulations incorporate it as a carrier solvent to improve the penetration and evaporation profile of cleaning concentrates. It also appears in specialty lubricant formulations as a solvent carrier for active ingredients applied to tight-tolerance mechanical components. This versatility makes it a staple in high-performance maintenance and repair operations across various sectors.

Trans-1,2-dichloroethylene is supplied as a clear liquid in standard drum and IBC quantities. Technical grade is the primary commercial specification available for industrial solvent applications, ensuring consistent performance in large-scale manufacturing environments. Purity levels typically range from 97% upward, with high-purity grades available for electronics and precision cleaning end uses. These specifications ensure that the solvent meets the rigorous demands of modern industrial cleaning and chemical processing standards.

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

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
  • Global Logistics Network enabled

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Physical Properties

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

Documentation

Safety & Handling 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.

Trade & Regulatory

HS Code 29032990
UN Number 1150
ADR Class 3
Packing Group II
Storage Class 3 - Flammable liquids
WGK (Germany) 2
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