Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Biodegradation in water: screening test

1-(tert-dodecylthio)propan-2-ol has to be considered as "not readily biodegradable" under the stringent conditions of OECD Guideline 301 F (Manometric Respirometry Test) (Kung, 1998). The test material attained only 5.9 % degradation after an exposure period of 28 days.

Biodegradation in water and sediment: simulation test

In accordance with column 2, section 9.2.1.4 of REACH Annex IX, the test does not need to be conducted if direct and indirect exposure of water and sediments is unlikely. The substance is not directly applied to water and sediments and based on its intended use and handling will not enter the aquatic environment. The indirect exposure of soil to this substance via sewage sludge is also of no concern based on the treatment of the sludge. ECHA Chapter R.7B and R.7C guidance states that if the PEC/PNEC ratio is below 1, then no risk for the compartment is indicated, that the information available may be sufficient to conclude the assessment, and there is no need to perform further tests. Additionally, ECHA REACH Guidance Chapter R.7B guidance states that if the substance is not considered a PBT or vPvB candidate, then it is considered not necessary to conduct further testing on the compartment. Furthermore, testing is waived in accordance with REACH Annex IX, column 2, sections 9.2.1.2 and 9.2.1.4.,because of the low water solubility of the substance (4.8 mg/L, Woolley and Mullee, 2003).

Biodegradation in soil

In accordance with column 2, section 9.2.1.3 of REACH Annex IX, the test does not need to be conducted if direct and indirect exposure of soil is unlikely. The substance is not directly applied to soil and based on its intended use and handling will not enter the terrestrial environment. The indirect exposure of soil to this substance via sewage sludge is also of no concern based on the treatment of the sludge. ECHA Chapter R.7B and R.7C guidance states that if the PEC/PNEC ratio is below 1, then no risk for the compartment is indicated, that the information available may be sufficient to conclude the assessment, and there is no need to perform further tests. Additionally, ECHA Chapter R.7B guidance states that if the substance is not considered a PBT or vPvB candidate, then it is considered not necessary to conduct further testing on the compartment.