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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 807-113-1 | CAS number: 3709-71-5
Endpoint summary
Administrative data
Description of key information
Additional information
HFP kinetic dimer is a volatile liquid with low water solubility. It is expected to distribute into the atmospheric compartment after emission. Phototransformation reactions with hydroxyl radical will remove HFP kinetic dimer with an atmospheric lifetime of 0.82 years. The pathway for decay is expected to be analogous to that for perfluorobutene (1), i.e., addition of hydroxyl radical to the unsaturated group followed by scission to form a carboxylate moiety from each of the two unsaturated carbons. The ultimate degradation products are expected to be perfluoroisobutyric acid (i-PFBA, CAS# 335-10-4), trifluoroacetic acid (TFA, CAS# 76-05-1) and hydrofluoric acid (HF, CAS# 7664-39-3).
We have proposed waiving hydrolysis testing based on limited water solubility and volatility. Hydrolysis is not expected to be important to the fate of HFP kinetic dimer. Also, no unexpected components were observed by GC-MS during the water solubility and partition coefficient studies, or by NMR after extended contact with moderately hard reconstituted water (daphnia medium), further supporting the lack of importance of hydrolysis to fate.
1) C.J. Young, M.D. Hurley, T.J. Wallington, S.A. Maybury. 2009. Atmospheric chemistry of perfluorobutenes (CF3CF=CFCF3 and CF3CF2CF=CF2); kinetics and mechanisms of reactions with OH radicals and chlorine atoms, IR spectra, global warming potentials, and oxidation to perfluorocarboxylic acids. Atmospheric Environment: Vol. 43, pp. 3717-3724.
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.
