Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Abiotic degradation

No determination was performed according to Method C7 Abiotic Degradation, Hydrolysis as a Function of pH of Commission Regulation (EC) No 440/2008 of 30 May 2008, for the following reason:

• During preliminary investigations for the water solubility test it was concluded that the test item hydrolysed fully within 30 minutes of contact with water. Substances which hydrolyse rapidly in contact with water are not suitable for determination using Method C7.

In accordance with Annex XI section 2 of the Regulation EC 1907/2006, 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.

In the water solubility test, the insoluble test item sat at the sides of the flask and quickly changed from an almost colourless liquid to a greasy white precipate. The test item therefore hydrolyses immediately on contact with water to an insoluble solid. all dibutyltin compounds degrade into dibutyltin and the appropriate ligand, the white solid observed in the test is probably DBTO, which is known to be insoluble.

Biotic degradation

Based on read-across from the structurally similar compound, DBT maleate, it can be concluded that DBT methyl maleate is not readily biodegradable. Simulation tests are not available. In the absence of such information DBT methyl maleate is concluded to be stable to biodegradation.