Fig. 7.

Synopsis of IC₅₀ values. The plot summarizes the IC₅₀ values obtained from the assays applied in this work. In the in vitro assays, maximal flame retardant concentrations were limited to 400 µM because of the maximal residual DMSO concentration of 0.1 %. Because of this limitation, IC₅₀ values were not calculated for some compounds. The calculated IC₅₀ values are illustrated on the lower segment of the plot. The data points at the top of the plot indicate that clear toxicity was not observed at test concentrations of 100–400 µM. n.d. not determined