3,3'-(1,1,3,3-tetramethyldisiloxane-1,3-diyl)bispropylamine

Short-term toxicity to aquatic invertebrates

Description of key information

Short-term toxicity to invertebrates: 48 hour EC₅₀ 16.5 mg/l (nominal) (OECD TG 202), in terms of the substance as tested. The observations in this study are attributed to the exposure of test organisms to the parent substance in the test system.

Key value for chemical safety assessment

Fresh water invertebrates

Fresh water invertebrates

Effect concentration:

16.5 mg/L

Additional information

A 48 hour EC₅₀ value of 16.5 mg/l and EC₁₀ value of 10.0 mg/l (nominal) have been determined for the effects of 3,3’-(1,1,3,3-tetramethyldisiloxane-1,3-diyl)bispropylamine (CAS 2469-55-8) on mobility of Daphnia magna. In view of the test media preparation method and exposure regime it is likely that the test organisms were exposed predominantly to the tested substance. The nominal test concentrations are supported by TOC analysis. Concentrations ranged between 80 and 120 % of nominal at nominal 10, 20 and 40 mg/L loadings whereas the exposure was higher than 120% of nominal at the nominal 2.5 and 5 mg/L levels which means that the actual EC₅₀/EC₁₀ results in the study report are representing a conservative interpretation of the test findings.