Registration Dossier
Registration Dossier
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EC number: 203-376-6 | CAS number: 106-23-0
Phototransformation in air
Administrative data
Link to relevant study record(s)
Description of key information
After evaporation or exposrue to the air, the product will be rapidly degraded by photochemical processes.
Key value for chemical safety assessment
Additional information
Reliable data obtained via a scientifically acceptable calculation method. The photodegradation of 3,7-dimethyl-6-octenal (citronellal) in air by reaction with OH radicals and ozone was calculated using EPIWIN v3.12, AOPWIN v1.91. Based on a reaction rate constant k(OH)=120.8289 x 10E-12 cm³/molecule x sec (25°C) and a tropospheric OH radical concentration of 5 x 10E5 radicals/cm³ (24 -h day) a half-life t1/2=3.19 h was calculated. Based on a reaction rate constant k(O3)=43.00 x 10E-17 cm³/molecule x sec (25°C) and an ozone concentration of 7 x 10E11 molecules/cm³ a half-life t1/2=338.38 min was calculated. The results indicate that 3,7 -dimethyl-6 -octenal will be very quickly photodegraded in the atmosphere by reaction with OH radicals and ozone.
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