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EC number: 814-283-0 | CAS number: 42220-47-3
The test item Phosphonic acid, P,P'-(1-hydroxyethylidene)bis-, compd. with 2-aminoethanol is an UVCB substance. The substructures etidronic acid forms with the triethanolamine a salt like structures, which in the aquatic milieu of the environment are expected to dissociate into etidronic acid and ethanolamine.
Therefore, for etidronic acid CAS: 2809-21-4 and ethanolamine CAS: 141-43-5 KOC values were determined:
etidronic acid : log KOC -1.32 (QSAR modelling KOCwin v. 2.00)
ethanolamine: log KOC -0.23 (QSAR modelling KOCwin v. 2.00), a similar value in a comparable range is also available from a REACH dossier for ethanolamine with log KOC -0.78.
The log KOC value of etidronic acid was further used to derive by EPM method the PNEC values for soil and sediment organisms. Etidronic acid (CAS: 2809-21-4) is not readily biodegradable, and therefore is expected to be more relevant for the environment than ethanolamine, which is readily biodegradable.
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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