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EC number: 252-156-6 | CAS number: 34690-00-1
No study of biodegradation in soil is available for the registration substance. A reliable study of biodegradation in soil conducted with the parent acid form of the structurally analogous aminomethylenephosphonate substance HMDTMP is read-across. This study shows extensive degradation during the study in two soil types, indicating a conclusion that a significant degree of removal is possible in the wider environment. The half-life has not been quantified.
The registration substance is part of a category family (super-category; see CSR for more details) which consists of several phosphonates that share a common chemistry incorporating alkyl backbones with one or more tertiary amine centres and multiple methylphosphonate groups present.
HMDTMP-H (CAS 23605-74-5) has two aminobismethylphosphonate groups, connected by a hexyl chain. BHMT acid (CAS 34690-00-1) has three amine centres (five methylphosphonate groups), connected by hexyl chains.
As well as being structural analogues, both phosphonates have consistent chemical properties including high MW (492 and 685 respectively), very low log Kow(≤-4 for both substances) and are highly soluble in water. The substances generally posses similar physico-chemical properties and are not readily biodegradable.
Therefore, for the purpose of this assessment, read-across is considered valid. Further information on the super-category and the validity of read-across are presented in the CSR Chapter 1.
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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