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Environmental fate & pathways

Phototransformation in air

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Description of key information

Estimated longest half-life for all components of the substance is 18 hours, based on reaction with photochemically-generated hydroxyl radical in the troposphere.

Key value for chemical safety assessment

Half-life in air:
18 h

Additional information

Due to the very low vapor pressure and miscibility of the substance in water, volatilization to the atmophere is a highly improbable fate process for this substance. Nonetheless, estimated reaction rate constants between the substance components and hydroxyl radical were generated, to allow input of an associated half-life in environmental exposure models.

Estimated half-lives for the components of this substance range from 12 to 18 hours, based on a default hydroxyl radical concentration of 500,000 molecules/cm3. The longest estimated half-life, associated with the lowest-molecular weight homologue, can be used to represent the atmospheric half-life of all homologous components of the substance in the chemical safety assessment.