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Environmental fate & pathways

Bioaccumulation: terrestrial

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According to REACH regulation (Annex X, 9.3, column II), further studies on bioaccumulation shall be proposed based on the outcome of the risk assessment. The risk assessment did not indicate the need for further testing.

However, measured BCF data are available for the structurally similar substance DODMAC (rationale for similarity see 4.3.1). (Data on BCF in fish see 4.1.3.)

Sediment accumulation tests with 14C-DODMAC and Lumbriculus variegatur respectively Tubifex tubifex showed biota sediment accumulation factors (BSAF) of 0.28 - 0.78 after 28 days. The main uptake route was sediment ingestion (EU RAR 2002).

Terrestrial plants (tomato, bean, cucumber and radish seedlings) showed a concentration of 0.01 to 0.05 mg DODMAC/kg in seedlings with 2 mg DODMAC/kg soil (EU RAR 2002). A biota-to-soil accumulation factor of 0.005 - 0.025 calculates from this numbers.

For MDEA-Esterquat the terrestrial bioaccumulation is expected to be of the same order of magnitude as that of DODMAC. The above information is considered as sufficient to support to the conclusion that the terrestrial bioaccumulation potential of the registration substance is expected to be low.