Trans-1,2-dichloroethylene
CAS 156-60-5
EC 205-860-2
Formula C2H2Cl2
MW 96.94 g/mol
Solvents Home Care & Industrial CleaningElectronicsLubricants & Metalworking Solvent & CarrierCleaning & Degreasing
Description
Trans-1,2-Dichloroethylene (CAS 156-60-5, EC 205-860-2), also known as trans-dichloroethylene or (E)-1,2-Dichloroethene, is the trans isomer of 1,2-dichloroethylene, a chlorinated solvent classified under HS code 29032990. It is the minor component of commercial 1,2-dichloroethylene mixtures, which typically contain approximately 40% of this isomeric form.
In electronics manufacturing, trans-1,2-dichloroethylene functions as a precision cleaning and degreasing solvent, dissolving flux residues and hydrocarbon contaminants from circuit board assemblies through direct solvation. In metalworking and industrial cleaning formulations, it acts as a carrier solvent, improving the penetration and evaporation profile of active cleaning agents on metal surfaces.
Trans-1,2-dichloroethylene is supplied as a liquid and is subject to REACH registration requirements within the European Union. Procurement teams should confirm isomeric purity specifications and SDS documentation prior to ordering, as regulatory obligations and handling requirements differ from those of the cis isomer.
In electronics manufacturing, trans-1,2-dichloroethylene functions as a precision cleaning and degreasing solvent, dissolving flux residues and hydrocarbon contaminants from circuit board assemblies through direct solvation. In metalworking and industrial cleaning formulations, it acts as a carrier solvent, improving the penetration and evaporation profile of active cleaning agents on metal surfaces.
Trans-1,2-dichloroethylene is supplied as a liquid and is subject to REACH registration requirements within the European Union. Procurement teams should confirm isomeric purity specifications and SDS documentation prior to ordering, as regulatory obligations and handling requirements differ from those of the cis isomer.
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 |
Safety & Handling (Learn More)
Danger GHS02 GHS07 GHS08
H
H225H302H315H319H332H336H370H371H373H402H412
P
P210P233P240P241P242P243P260P261P264P270P271P273P280P317P319P321P330P405P501P264+P265P301+P317P302+P352P304+P340P308+P316P332+P317P337+P317P362+P364P370+P378P403+P233P403+P235P303+P361+P353P305+P351+P338
Trade & Regulatory
| HS Code | 29032990 |
| UN Number | 1150 |
| ADR Class | 3 |
| Packing Group | II |
| Storage Class | 3 - Flammable liquids |
| WGK (Germany) | 2 |
Other Names
(E)-1,2-dichloroethenetrans-dichloroethylene(E)-1,2-dichloroethylenetrans-1,2-Dichloroethene(1E)-1,2-dichloroethylene(E)-CHCl=CHCl(E)-1,2-Dichlorethen1,2-DICHLOROETHYLENE(E)-1,2-Dichlorethylen
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