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EC number: 200-756-3
CAS number: 71-55-6
Soil photolysis is considered not a critical route of removal from the environment based on environmental distribution models. The models indicate that less than 0.1% will partition to soil and sediments. In addition 1,1,1-trichloroethane is highly resistant to photolytic degradation but rapidly vaporises into the atmosphere.
In the 1996 UK review it is
noted that the material is not expected to be present in soils or
sediments. in addition trichloroethane is resistant to abiotic
degradation (hydrolysis and photolysis) with half lives estimated in
months rather than days. Contamination of soil and sediments is not predicted
using environmental fate/distribution modelling. Levels of contamination
of soil is predicted to be appreciably lower than that expected in
surface and marine waters. It is generally accepted by reviewers that the
levels of the material are so low in the soil/sediment compartment that
for risk assessments this compartment can be ignored/discounted.
Existing reviews particularly those conducted by Dutch authorities
emphasise that soil contamination is a problem due to leaching into
potable water aquifers. The reviewers identify the source and attributed
the reason for the problem to leaching from uncontrolled contaminated
waste sites/dumps and not to contamination arising from manufacture or
transport of the material. Contamination of water is therefore
considered unlikely when used as a transported intermediate as no
release would occur.
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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