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Phototransformation in air

The stability of trimethyl benzene-1,2,4-tricarboxylate in the atmosphere was calculated using the computer program AOPWIN (v 1.92). It is predicted that the substance will be degraded in the atmosphere by reaction with photochemically-produced hydroxyl radicals. The half-life for this reaction in air is estimated to be 23.0 days.

The overall degradation rate constant with OH radicals is estimated to be equal to 6.025E-8 cm3/(molecule-day).


The stability of the test material against hydrolysis was estimated using the ARChem SPARC online tool, module Hydrolysis.

A base-catalysed second-order hydrolysis rate constant (Kb) of 0.1567 L/(mol-sec) at 25 deg C was determined using a structure estimation method. This corresponds to half-lives of 140.3 years at pH 5, 1.40 years at pH 7 and 5.12 days at pH 9.