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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Phototransformation in air

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Administrative data

Link to relevant study record(s)

Description of key information

OH-radical rate constant: 4.6 E-12 cm³/molecule*sec; half-life air: 3.5 d (24 -h day, 0.5 E06 OH/cm³; ECT, 2009).

Key value for chemical safety assessment

Half-life in air:
3 d

Additional information

The degradation of isobutyl acetate in air by reaction with OH-radicals was estimated with the AOP programme (v1.92; ECT, 2009). Based on a 24 -h day with an OH radical concentration of 0.5 E06 OH/cm³ the overall OH rate constant was calculated to be 4.6010 E-12 cm³/molecule*sec, leading to a half-life of approx. 3.5 days (equivalent to 83.7 h).