Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Aquatic Bioaccumulation

The potential for the test material to bioaccumulate was evaluated in a study conducted in accordance with the Test Method Relating to New Chemical Substances “Bioconcentration test of chemical substances in fish and shellfish” (Japanese notification, Yakushokuhatsu 0331 No.7, Heisei 23.03.29 Seikyoku No.5, Kanpokihatsu No.110331009, March 31, 2011; latest revision, December 21, 2015). Carp were exposed to concentrations up to 1 mg/L for 61 days in a flow-through study. Due to a lack of analytical sensitivity, BCF could not be confirmed to be less than 1000 L/kg in any component at the low concentration level. Meanwhile, BCFs of all components at the high concentration level were below 489 L/kg, BCFs of all components at the low concentration level were less than 1400 L/kg, and no components detected. Therefore, it can be concluded that the bioconcentration potential of the test substance in fish is not high.

Abiotic degradation; Hydrolysis

Since the test item is a complex mixture and has low solubility in aqueous media, and in accordance with REACH Annex VIII, Section 9.2.2.1, column 2, assessment of hydrolytic stability was not carried out using Method C.7 Abiotic degradation, Hydrolysis as a Function of pH of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 111 of the Guidelines for Testing of Chemicals, 13 April 2004.

Biodegradation

In a key study performed to OECD Guideline 301B, EC Method C.4 -C and US EPA OPPTS 835.3110, the test item at a concentration of 10 mg C/L was exposed to activated sewage sludge micro-organisms with a mineral medium in sealed culture vessels in the dark at 20 to 22°C for 28 days. The degradation of the test item was assessed by the determination of carbon dioxide produced. Control solutions with inoculum and the reference item, sodium benzoate, together with a toxicity control were used for validation purposes. The test item attained 16% degradation after 28 days. The test item cannot therefore be considered to be readily biodegradable under the terms and conditions of the Guideline.

Adsorption / desorption coefficient (Koc)

In a key study using the HPLC screening method designed to be compatible with Method C.19 of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 121 of the OECD Guidelines for Testing of Chemicals, 22 January 2001, the adsorption coefficient of the test item was determined to be greater than 4.27 x 10E5 with a log10 Koc of > 5.63.

Additional information