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Environmental fate & pathways

Phototransformation in air

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Description of key information

In the atmosphere triamines C16-18 and tetramines C16-18 are likely to be degraded by reaction with hydroxyl radicals. Degradation rates for some components were calculated with the Atmospheric Oxidation Programme based on structure activity relationships developed by Atkinson (1987). With a concentration of 500,000 OH-radicals/cm3, degradation half-lives of 1.7 h and 1.24 h for resp triamine C18 and tetramines C18, and 2.1 and  1.4 h for the cis- and trans-isomer of the triamines 9-octadecenyl , respectively, were calculated. For the exposure calculations, a mean value for the tri- and tetraamines of 1.9 h is used. Because there are no important releases into the atmosphere and volatilisation is expected to be negligible, this removal mechanism is thought to be of low relevance.

Key value for chemical safety assessment

Half-life in air:
1.9 h

Additional information

Because there are no important releases into the atmosphere and volatilisation is expected to be negligible, this removal mechanism is thought to be of low relevance.