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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 rapidly degraded by photochemical processes.

Key value for chemical safety assessment

Additional information

Parent compound: Based on an estimated OH radical rate constant of 24.2431E-12 cm³/(molecule*sec), the half-life of stearoyl chloride was calculated to be 15.9 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 stearic acid: Based on an estimated OH radical rate constant of 22.4804E-12 cm³/(molecule*sec), the half-life of stearic acid was calculated to be 17.1 h (test conditions: 0.5 E06 OH/cm³, 24 -h day) (BASF SE, 2009).