Registration Dossier
Registration Dossier
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EC number: 269-927-8 | CAS number: 68391-08-2
Endpoint summary
Administrative data
Description of key information
Additional information
Phototransformation in air
Photodegradation in the air: a study on the photodegradation in the air of 8 -2 FTOH (2POE as cited in the study report) is available (Telomer Research Program, 2003).
Since preliminary tests showed difficulties in testing because of the low vapour pressure of the substance of study, an alternative approach was tried with 2 surrogates of 2POE. Fluorinated alcohols of short-chain (CF3CH2CH2OH = TFP and C6F13CH2CH2OH = TDO) were used to extrapolate the rate constant and lifetime of 8 -2 FTOH. The studies have been carried out using two photoreactors: a 150 L Teflon bag irradiated by lamps at CNRS-Orleans for the kinetics and mechanistic studies, and the 200 m³ European photreactor, EUPHORE, irradiated by sunlight at Valencia (Spain) also for the mechanistic study. Same values were obtained for the two substances tested, therefore a value of K = 1.06x10E-12 +/-0.2 cm³/molec*s for the 8-2 FTOH molecule was recommended. The major products observed were the fluoroaldehydes CnF(2n+1)CH2CHO and CnF(2n+1)CHO in the presence and absence of NOx. It was observed that these two type of compounds are succesively formed and CF2O is the end product. PAN like compounds (e.g. CF3CH2C(O)OONO2) were also observed in the presence of NOx. This mechanism can be generalised for the larger fluoroalcohols, including 2POE.
Hydrolysis
The aqueous stability of the test substance in sterile aqueous solutions buffered at pH 1.2, 4.0, 7.0 and 9.0 was determined. Test systems consisted of the test substance in aqueous buffered solutions in sterilized containers. The test system was incubated in the dark at 50°c at pH 4, 7 and 9 and at 37°C at pH 1.2.
The test substance isstable under the conditions of the test at pH 4, 7 and 9 at 50°C and pH 1.2 at 37°C. The time in which 50% of the test substance will transform is estimated as greater than one year:
t1/2> 1 year.
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