Registration Dossier

Environmental fate & pathways

Phototransformation in air

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Description of key information

After evaporation or exposure to the air, the product will be rapidly degraded by photochemical processes.

Key value for chemical safety assessment

Half-life in air:
0.16 d

Additional information

The tested multiconstituent substance belongs to a category of substances consisting of similar composition. Starting substance for all group members is Propylidynetrimethanol which is ethoxylated and/or propoxylated to different magnitudes and - for some of the substances - gets modified with an amine compound. A more detailed description of the group is attached to section 13 of this dossier. Due to the multiconstituent nature of the test substance a representative structure was used in order to calculate a half-life in air. For this calculation a 24-hour day as well as a sensitizer-concentration (OH-radicals) of 500000 molecules/cm³ were assumed. The calculated rate constant of 102E-12 cm³/molecule-sec results in a half-life in the atmosphere of approx. 0.16 days (BASF SE 2012).