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EC number: 201-201-8
CAS number: 79-38-9
Chlorotrifluoroethylene (CTFE) is a volatile gas at ambient
condition with a moderate water solubility and an high tendency to
rapidly volatilise to the air. This tendency is also confirmed by the
results from the EQC Fugacity III Model (Version 2.02, The Canadian
Centre for Environmental Modelling and Chemistry, May 2003). The Level
III fugacity model predicts partitioning between four environmental
compartments (air, soil, sediment and water) using a combination of
default parameters and various input physico-chemical parameters. The
model was run assuming emissions only to air. In fact, in case of an
accidental emission, CTFE is uniquely released to air, because of its
volatility at ambient conditions and boiling pointin
the range of -26.2°C (The Beilstein database. Reference: Miller - 1951)
to -26.8°C (The Beilstein database. Reference: Henne - 1948).
The environmental fate of the substance, assessed through the
model, confirmed that, following emissions in air, CTFE remains in this
compartment. The rates of transfer to soil and water are very low and
only negligible amounts of the total emission remain in these media and
Hence, due to the gaseous nature of the substance and its
partition to the atmosphere, as well as the consequent difficulty to
appropriately test CTFE and provide meaningful results, no experimental
bioaccumulation data are reported. However, in order to evaluate the
bioaccumulation hazard profile of CTFE despite the fact, that it is
expected to rapidly partition to the atmospheric compartment, the BCFBAF
(v.3.00, EPI Suite v.4.0) model may be applied, the result of the BCFBAF
model is attached.
The model prediction for CTFE yielded a BCF of 5.7 and a log Kowof
According to Annex XIII of Regulation (EC) No 1907/2006 and to the
Guidance on information requirements and chemical safety assessment
Chapter R.11 (PBT Assessment, May 2008), a substance does not fulfill
the criterion “bioaccumulative (B)” or “very bioaccumulative (vB) ” if
the BCF is below 2000 and 5000, respectively, or the log Kow is below
4.5, therefore CTFE is not expected to be bioaccumulative.
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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