Registration Dossier
Registration Dossier
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EC number: 300-326-6 | CAS number: 93925-25-8
Phototransformation in water
Administrative data
Link to relevant study record(s)
Description of key information
Deemed photolytically stable, due to water insolubility irrelevantly low levels in light flooded upper water layers expected
Key value for chemical safety assessment
Additional information
Experimental data on phototransformation in water are not available for the submission item. As this endpoint is not a standard information requirement in REACH and there is no indication from the Chemical Safety Assessment on the need to investigate further the fate and behaviour of the substance, no further testing is considered necessary. This is, however, a requirement only for the highest tonnage band > 1000 t per year according to the Corrigendum to Regulation (EC) No 1907/2006 of the European parliament and of the council of 18 December 2006 concerning the Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH), Annex X, 9.3.4., p L 136/118, published 2007-05-29 in the Official Journal of the European Union).
The submission item can be regarded as water insoluble. Therefore it is considered unlikely that it can be present in the light flooded upper layers of the water column in relevant levels as it would be required for a significant photolysis in water. In the algal study (Vryenhoef & Mullee 2011, Harlan Report no. 41103269) the submission item levels decreased with time independently from the presence of algae. As a comparable decrease was observed in the daphnids and fish acute toxicity tests (Goodband & Mullee 2012, Harlan Reports no. 41103268 and 41103267, respectively), i.e. under low light intensities, this dissipation seems not triggered by light. Due to the spectral properties of the submission item, i.e. the lack of absorption in the spectral range of natural daylight, direct photodegradation is assumed an irrelevant degradation mechanism.
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