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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

No tests available for phototransformation/photolysis. Not required under REACH.

An estimation of the Hydroxyl Radicals Reaction is available with AopWin v1.92 for some substances:

OVERALL OH Rate Constant:

STS = 1.2243 E-12 cm3/molecule-sec

SXS = 3.1131 E-12 cm3/molecule-sec

NH4XS = 3.1131 E-12 cm3/molecule-sec



STS = 8.737 Days (12-hr day; 1.5E6 OH/cm3)

SXS = 3.436 Days (12-hr day; 1.5E6 OH/cm3)

NH4XS = 3.436 Days (12-hr day; 1.5E6 OH/cm3)

Values for STS have been taken as representative for the risk assessment


Key value for chemical safety assessment

Half-life in air:
8.737 d
Degradation rate constant with OH radicals:
0 cm³ molecule-1 s-1

Additional information

No information available for phototransformation/photolysis. Not required under REACH