Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 201-201-8 | CAS number: 79-38-9
Phototransformation in air
Administrative data
Link to relevant study record(s)
Description of key information
Rate constant with OH radicals = (7.27 ± 0.4) x 10^-12 cm cu/mol sec at 297K (24°C)
Atmospheric half life = 2.2 days
Key value for chemical safety assessment
Additional information
Information regarding the atmospheric degradation of chlorotrifluoroethylene (CTFE) was sourced from 5 review articles of
Klimisch-2 reliability.
All the studies agree on the fact that the reactions of CTFE in the atmosphere are very fast which indicates a very low persistence of CTFE in the atmospheric compartment.
In particular the rate constant of the reaction of CTFE with OH radicals is of 10^-12 cm3 molecule^-1s^-1 order of magnitudo and that its atmospheric life time is of few days (2 -3 days).
In respect to the reaction with ozone a rate constant of 1.6 X 10^-20 cm cu/mol sec and a half-life for this of 715 days at an ozone concentration of 7 X 10+11 mol/cm cu has been estimated for CTFE.
The values selected as key information were sourced from the article of Abbatt J.P.D. et al. which reports the rate constant of the reaction of CTFE with OH radicals at ambient temperature.
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.
