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Environmental fate & pathways

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Phototransformation in air

Supporting information has been provided in the form of data taken from a peer reviewed database (Syracuse Research Corporation). No details on methodology are provided and the study was awarded a reliability score of 2 in accordance with the criteria for assessing data quality set forth by Klimisch et al. (1997).

The Atmospheric OH Rate Constant was reported as: 6.59E-11 cm³/molecule-sec at 25 °C.


In accordance with section 1 of Annex XI it I considered to be justified to omit this study on the basis that 2,6-xylenol does not contain any functional groups which under normal environmental (pH) conditions will be hydrolysable.

Phototransformation in water

The database of the Syracuse Research Corporation (2010) reports an experimentally determined OH rate constant of 6.59E-11 cm³/molecule/s at 25 °C (Kwok and Atkinson, 1994). This rate constant agrees with a half life of 5.84 h under typical environmental conditions. One reliable study was identified on phototransformation of 2,6 -Xylenol in water using direct sunlight (Faust and Hoigne, 1987). This study measured a half life of 7.4 h at the surface and 19 h at a 1 m depth. In natural water (Greifensee), a half-life of 1.9 d was measured in the upper 1 m of the water column.