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EC number: 200-756-3
CAS number: 71-55-6
distribution models predicted that the bulk >99% of the material
released into the environment will make its way into the atmosphere.
Levels in the aquatic environment are predicted to be of the order of
<0.25% and in soil and sediment <0.01% as the material rapidly
volatilises from both water and soil. The Henry's Law constant is 3.47
indicating that the material is highly volatile with a Kaw of -0.03 to
-0.17. In practical terms because of the materials ability to volatilise
the DT50 is of the order of the few hours to the few days for water,
soil and sediments with the primary mode of loss to the atmosphere.
The physical chemical properties
of trichloroethane indicate that it will not bioaccumulate (BCF = 9) as
the Kow is of the order of 2.17. The Koc of 2.2 also indicates that it
does not adsorb on to organic matter in soils and sediments.
Biodegradation (bacterial) in the
aquatic environment can occur under both aerobic and anaerobic
conditions with the latter being of greatest importance. Acclimatised
sewage sludge can rapidly degrade trichloroethane giving a DT50 of
approximately one day indicating that trichloroethane can be classified as
inherently biodegradable. A number of studies indicate that it can be
degraded in municipal sewage treatment plants that can tolerate
concentrations of up to 360mg/L.
Prior to the implementation of
the restrictions proposed in the Montreal protocol extensive monitoring
of concentrations in rivers, estuaries and the open sea were conducted
by national governments in the northern EU. The data from these surveys
indicate that concentrations of trichloroethane in rivers were of the of
<0.1ug/L with worst-case values of 0.6ug/L. In estuaries 0.024ug/L are
considered typical with worst-case concentrations of 0.206ug/L. In the
North Sea concentrations were usually <0.1ug/L.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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