Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

The stability of 1,4 -benzenediamine, N,N'-mixed phenyl and tolyl derivatives (DAPD) was evaluated by testing (or modeling) the transformation (and half-life) of the substance in different environmental compartments. Phototransformation in air was modeled using a QSAR (EpiWin) and was indicative of a short half life of the substance in air (DT50 = 0.64hr).

Phototransformation in water was tested (McLaughlin, 2004) at two different pHs (6 & 8) and indicated DT50 values adjusted for natural sunshine of 0.94 and 1.78 days respectively.

Finally the potential of the substance to hydrolyse was evaluated. The combined results of two studies indicate that no chemical reaction is occurring between water and DAPD under the applied experimental conditions