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Environmental fate & pathways

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In a read-across approach, hydrolysis studies from similar alkyl phosphate esters (Tris-chlorpropyl phosphate, Dibutyl-phosphate) were proven to be stable at 50°C and pH4, 7 and 9.

Mabey & Mill (1978) review the available published hydrolysis data for a number of chemicals. Neutral hydrolysis is reported to be the dominant process for this class of compounds (phosphoric acid esters) at pH7. A half-life of 5.5 years is calculated, based on the rate of hydrolysis at neutral pH.  The second order alkaline hydrolysis rate constant is estimated to be 1.75 x 10 -5 M-1 sec-1 at 27 degrees Celsius (Wolfe, 1980).

The substance triethyl phosphate is stable to hydrolysis under normal environmental conditions.