Derivation of PNECs in fresh water

There are insufficient data to conduct a probabilistic estimate of no-effect concentrations. For each of the organotins, the following outlines the reasoning for selection of studies and application of uncertainty factors  

Organotin End-point Uncertainty factor Estimated PNEC (ug/i) 

MMTC 0.007 mg/1 chronic NOEC for Scenedesmus subspicatus (Oldersma et al., 2003a) 50 0.1 

DMTC 0.2 mg/1 chronic NOEC for Daphnia (de Roode de Haan, 2004a) 50 4 

MOTC 0.003 mg/i chronic NOEC for Scenedesmus subspicatus (Oidersma et ai., 2004b) 50 0.06 

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