Bioaccumulation and toxic effects of elevated levels of 3,3′,4,4′-tetrachloroazobenzene (33′44′-TCAB) towards aquatic organisms. III: Bioaccumulation and toxic effects of detrital 33′44′-TCAB on the aquatic snail, indohiramakigai (Indoplanorbis Exustus)

The polychlorinated aromatic compound 3,3′,4,4′-tetrachloroazobenzene (33′44′-TCAB) is a contaminant of many 3,4-dichloroaniline (3,4-DCA) based herbicides, and of agricultural soils. In this study, the aquatic snail Indohiramakigai (Indoplanorbis exustus) was exposed to detrital 33′44′-TCAB. The snails absorbed 33′44′-TCAB from their environment, but only to a maximum level of approximately 287 ppb (whole body basis). This level of 33′44′-TCAB did not appear to cause any harmful effects.