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No test on hydrolysis is available. However, m-cresol is classified as readily biodegradable. Therefore no test is required according to REACH Regulation, Annex VIII, column 2. With regard to its chemical structure hydrolysis is not expected to be a relevant fate process.

Indirect photolysis in the atmosphere

In the atmosphere, m-cresol will react with photochemically produced hydroxyl-radicals. In his critical review Atkinson recommended values for the reaction constant kOH at room temperature of 6.4 x 10-11 cm3 x molecule-per second. Based on a tropospheric OH radical concentration of 5 x 10+5 molecules per cm3 a corresponding half-life of 6.0 h can be calculated.