Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

For the environmental fate endpoints hydrolysis and adsorption/desorption data a waiver has been submitted due to experimental restraints resulting from the nature of the substance:

Hydrolysis:

No determination of hydrolysis as a function of pH was feasible by the methods presented in Method C7 Abiotic Degradation, Hydrolysis as a Function of pH of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 111 of the OECD Guidelines for Testing of Chemicals, 13 April 2004 based on observations during method development which indicated hydrolysis of the test item in less than 5 minutes.

Adsorption/desorption:

Due to the rapid hydrolysis of the test item, the study could not be conducted because the substance and its relevant degradation products decompose rapidly (study scientifically not appropriate). As a result the Koc and LogKoc were calculated using the LogKow EPISuite, Kocwin v2.00. The estimated values were 119.4 L/Kg and 2.0769 respectively, these values are considered to represent conservative estimates suitable for risk assessment

Biodegradation

The test item attained 70% biodegradation after 28 days. Despite attaining in excess of 60% biodegradation the test item failed to satisfy the 10-Day window validation criterion, whereby 60% biodegradation must be attained within 10 days of the biodegradation rate exceeding 10%, and therefore cannot be considered to be readily biodegradable under the strict terms and conditions of OECD Guideline No. 301F.  However, the test item has exhibited the potential for rapid biodegradation.

Additional information