Trichloroethylene (TRI) is a partially chlorinated C2-hydrocarbon with the formula C2Cl3H. TRI is used:
- as feedstock material to produce fluorinated hydrocarbons (for instance for use in refrigeration and airconditioning systems) and fluorinated polymers and
- as an industrial solvent in various applications, among which the cleaning of storage tanks for liquid oxygen and hydrogen.
Industrial metal degreasing is one of the TRI applications
Whereas in the past the use as a solvent was predominant, it's today the contrary: the majority of produced TRI (ca. 80%) goes into the production of other chemicals.
TRI is a clear non-flammable liquid with an 87°C boiling point, has good chemical stability, is non-miscible with water and has a low evaporation energy (about 9 times lower than water). This makes TRI well-suited for vapour phase decreasing and equipment internal recycling through distillation with a constant re-use in closed loop systems at high quality levels.
The use of closed systems is being strongly recommended by ECSA and will become a precondition for sales into surface cleaning uses under the ECSA TRI Charter .
Consult the ECSA TRI Charter.
REACH: TRI has been added to ANNEX XIV of REACH on the 21st of April 2013 with the following dates:
- Application Date: October 21, 2014 (date by which applications for authorization must be submitted to allow continued uses after the sunset date),
- Sunset Date: April 21, 2016)
TRI can only be used after the sunset date when a downstream user or his supplier holds and authorization for a particular use or the use falls under certain exemptions such as intermediate use or use in scientific research and development below 1mt/year (which includes the use in quality control). Please contact your supplier if TRI is mandatory for your operation and you want to continue to use it.
Please refer to the webpage of the European Chemical Agency ECHA for further information on authorisation.
For more information of Methylene Chloride please refer to the respective Health Profile and Product Safety Summary Document (Publication)