Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

The phototransformation of 3,7-Dimethylocta-2,6-dienal (citral) in air by reaction with OH radicals and ozone, respectively, was calculated using EPIWIN v3.12, AOPWIN v1.91. Based on the reaction rate constant k(OH)=136.0296 x 10E-12 cm³/molecule x sec (at 25°C) and a tropospheric OH radical concentration of 5 x 10E5 radicals/cm³ (24 -h day) a half-life t1/2=2.83 h was calculated. Based on the reaction rate constant k(O3)=44.183 x 10E-17 cm³/molecule x sec (at 25°C) and a ozone concentration of 7 x 10E11 molecules/cm³ a half-life t1/2=37.35 min was calculated. Therefore, a very quick photodegradation of citral present in the gas phase of the atmosphere is to be expected. Furthermore the substance is not expected to hydrolyse in contact with water.