Registration Dossier

Ecotoxicological information

Endpoint summary

Administrative data

Description of key information

Additional information

Measured toxicity data are not available for terrestrial organisms for o-tert-butylphenol.

 In column 2 (9.4 Effects on terrestrial organisms) of Annex IX, REACH Regulation (EC) No 1907/2006, it is laid down that studies do not need to be conducted if direct and indirect exposure of the soil compartment is unlikely.

Direct and indirect exposure of soil is considered unlikely to occur from the manufacture and use of o-tert-butylphenol. The substance is not supposed to be applied to soil, therefore direct exposure to soil organisms is not expected. Reliable biodegradation study results indicate that the substance is considered inherently biodegradable and it can be assumed that o-tert-butylphenol will be biodegraded within the STP process and unlikely to be transferred to the soil compartment via sewage sludge. Any release to wastewater treatment plants or soil from residual o-tert-butylphenol in resin is negligible. 

The low adsorption coefficient of Log Koc 2.98 and the low bioconcentration factor (BCF = 78 from Chemical Evaluation and Research Institute Japan, 2008) indicate o-tert-butylphenol has a low potential for adsorption to soil or sediment and is unlikely to accumulate through the terrestrial ecosystem; indirect exposure to terrestrial organisms is considered unlikely. Therefore, no tests on terrestrial organisms are provided.