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Environmental fate & pathways

Phototransformation in air

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Description of key information

In the atmosphere primary fatty amine ethoxylates  are likely to be degraded by reaction with hydroxyl radicals and ozone.. 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, a degradation half-life of (0.677 to 0.705 hours) for both 2,2’(octadec-9-enylimino)-bisethanol and bis (2 -hydroxyethyl) tallow alkylamine was calculated. For the exposure calculations, a mean value of 0.7 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:
0.7 h

Additional information

The degradation rate constant is 181.9311 E-12 cm3/molecule/second for both for both 2,2’(octadec-9-enylimino)-bisethanol and bis (2 -hydroxyethyl) tallow alkylamine