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Environmental fate & pathways

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The bioaccumulation of tributylphosphate was investigated in a continuous exposure system in Killifish (Sasaki et al, 1982). The test substance was taken up rapidly into the fish, reaching steady state within 24 hours. Levels remain constant for the remainder of the study. BCF values were calculated to be 21 -35. Following removal from the test water, elimination was rapid with a BH value of 1.25 hours. Levels were below the lod at 24 hours.

The bioaccumulation of the substance from water was investigated in carp over a period of 6 -8 weeks (CITI, 1992). BCF values for fish of 6.9 -20 were calculated for the substance at a concentration of 6 ug/L in water; BCF values of 5.5 -10 were calculated for a concentration in water of 60 ug/L.