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The phototransformation of AAPB consisting of C8-, C10-, C12-, C14-, C16-, and C18-fatty acids was calculated using EPIWIN v3.11, AOPWIN v1.91. Half-lives ranging from 6.8 h (C18 derivate) to 9 h (C8 derivate) were calculated. The results indicate theoretically a rapid photodegradation (t1/2<10 h) of the components (C8-C18 derivates) of AAPB. Due to the ionic character of the compound and the low vapor pressure, however, the occurrence of gaseous AAPB in air is expected to be negligible and therefore the photodegradation in air is only of minor importance.



Limited information on hydrolysis is available from an EPIWIN calculation. Hydrolysis is not to be expected under environmental conditions: the calculated hydrolysis half-life time (t1/2) for AAPB consisting of C8-C18 fatty acids was found to be > 1 year.