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Environmental fate & pathways

Phototransformation in air

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Description of key information

After evaporation or exposure to the air, the product and its hydrolysis product will be slowly degraded by photochemical processes.

Key value for chemical safety assessment

Additional information

Parent compound: Based on an estimated OH radical rate constant of 11.2E-12 cm³/(molecule*sec), the half-life of 2 -ethylhexanoyl chloride was calculated to be 34 h (test conditions: sensitiser for indirect photolysis: OH; 0.5 E06 OH/cm³, 24-h day) (BASF SE, 2009).This estimation refers to dry air. In mist, rain, droplets and aerosols hydrolysis will be the major fate process in air due to the short half-life in aqueous solutions.

Hydrolysis product 2 -ethylhexanoic acid: Based on an estimated OH radical rate constant of 8.2E-12 cm³/(molecule*sec), the half-life of 2-ethylhexanoic acid was calculated to be 47 h (test conditions: 0.5 E06 OH/cm³, 24 -h day) (BASF SE, 2009).