Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

FAT 40868 is found to be hydrolytically stable and not inherently biodegradable. However, it can be assumed to have high mobility based on the value for adsorption coefficient.

Additional information

In general textile chemicals, especially textile dyes, are designed to be no organic substrates for microorganisms, fungi and higher organisms. Therefore, these substances are considered to be not biodegradable. Nevertheless, basic studies to assess hydrolytic stability, biodegradability and adsorption coefficient of the test item have been performed.

In a hydrolysis study with FAT 40868, it was assessed to be hydrolytically stable at pH 7 with an estimated half-life of > 1 year at 25 °C.

In an inherent biodegradability test conducted with FAT 40868/A TE according to the OECD Guideline 302B, was performed with the test substance, 0% was biodegradation was observed after 28 days of exposure time. Hence, FAT 40868/A TE was considered not inherently biodegradable.

The adsorption coefficient (Koc) of the test item has been determined to be less than 17.8, log10 Koc less than 1.25 in a study conducted according to OECD Guideline 201 and EU Method C.19. These values indicate that the test item will have a very high mobility.

Hence, based on the above assessment, FAT 40868 is found to be hydrolytically stable as well as not inherently biodegradable. However, it can be assumed to have high mobility based on the value for adsorption coefficient.