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EC number: 908-205-5
CAS number: -
In general, perfluorinated compounds are chemically inert. The sole
known phototranformation pathway is direct photolysis in the upper
atmosphere. Bracketing by category members was used to establish the
range of phototransformation lifetimes (i.e, 1/rate constant).
Perfluorohexanes lifetime: 3200 years. Perfluorohexanes were not subject
to indirect phototransformation in photochamber tests. Accepted lifetime
published by Intergovernmental Panel on Climate Change.
Perfluoro-N-methylmorpholine lifetime: 1600-4000 years.
Perfluoro-N-methylmorpholine was not subject to indirect
phototransformation in photochamber tests. Minimum lifetime was set by
phototransformation test detection limit. Maximum was set by accepted
lifetime of Perfluoropentanes (4000 years) published by
Intergovernmental Panel on Climate Change.
In addition, data for perfluorotriethylamine was read across to
perfluorotripropylamine. Perfluorotriethylamine was not subject to
direct photo transformation at long UV wavelenghts, nor to indirect
phototransformation by atomic oxygen or hydroxyl radical (data ). A
lifetime >2000 years was assigned based on upper limit of rate constant.
The atmospheric lifetime of MTDID 22327 was determined using a category
approach wherein the experimental lifetimes of similar substances with
similar physical and chemical properties are used to define the upper
and lower bound atmospheric lifetime. The resulting range is 1600 - 4000
Because these substances exhibit similarity in their physicochemical
properties and toxicological properties in mammals, and because
available data indicates that parent molecules are not reactive toward
biological molecules, cannot undergo bioactivation by normal enzymatic
processes, and are inert to chemical degradation processes, they can be
considered to constitute a chemical category. Data gaps for fate
properties can therefore be addressed by read-across and/or trend
analysis between category members. The read-across is considered
reliable with restrictions and the result is suitable for use in Risk
Assessment, Classification & Labelling, and PBT Analysis.
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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