Decamethylcyclopentasiloxane (D5) spiked sediment: Bioaccumulation and toxicity to the benthic invertebrate Hyalella azteca

► Chronic toxicity of decamethylcyclopentasiloxane was assessed with Hyalella azteca. ► 28-d LC50s were 191 and 857 μg D5 g−1 dry weight. ► Traditional BSAFs were <1, and BAFs (OECD method, 2008) were also <1.