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EC number: 232-088-3
CAS number: 7785-84-4
A key study for the endpoint 'adsorption/desorption' has not been performed for trisodium trimetaphosphate. An adaptation from the standard testing regime is justified on the following basis: In accordance with Section 2 of Annex XI of Regulation (EC) No 1907/2006 (REACH), testing is technically not possible as the relevant guideline for a screening study (OECD 121) is not validated for this type of substance and the batch equilibrium method (OECD 106) is not considered to be applicable (see 'discussion').
to Annex XI, Section 2 of Regulation (EC) No 1907/2006 (REACH) testing
for a specific endpoint may be omitted if it is technically not possible
to conduct the study as a consequence of the properties of the substance
itself. A study to investigate the adsorption / desorption
characteristics of trisodium trimetaphosphate has not been conducted.
The justifications for not providing these data are as follows:
screening study according to OECD Guideline 121, is not technically
possible as the test method is not validated for inorganic substances.
- A batch
equilibrium study according to OECD Guideline 106 was deemed to be not
applicable to trisodium trimetaphosphate for the following reasons:
analysis of the test material may not be possible due to interference
from the soil extracts that may leach into the aqueous media during the
test. This would prevent quantification of the test material.
addition, the mobility of the test item would be dependent on the anion
exchange capacity of the soils as the main component of the test
material is an anion. This absorption relationship would not be
anticipated to correlate with the organic carbon content of the soils
and is considered to be beyond the scope of the OECD 106 method.
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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