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EC number: 224-292-6
CAS number: 4292-10-8
The phototransformation of AAPB consisting of C8-, C10-, C12-, C14-, C16-, and C18-fatty acids was calculated using EPIWIN v3.11, AOPWIN v1.91. The calculation yielded half-lives ranging from 6.8 h (C18 derivate) to 9 h (C8 derivate).
The phototransformation of AAPB consisting of C8-, C10-, C12- , C14- ,
C16-, and C18-fatty acids was calculated using EPIWIN v3.11, AOPWIN
v1.91. Based on a OH radical concentration of 500000 molecules/cm³ (24
h-day, average hydroxyl concentration) and the estimated atmospheric
reaction rate constants (C8: 42.769 x 10E-12 cm³/molecule x s; C10:
45.595 x 10E-12 cm³/molecule x s; C12: 48.420 x 10E-12 cm³/molecule x s;
C14: 51.247 x 10E-12 cm³/molecule x s; C16: 54.073 x 10E-12 cm³/molecule
x s, and C18: 56.899 x 10E-12 cm³/molecule x s) 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 this
degradation pathway is only of minor importance.
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