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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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Administrative data

Link to relevant study record(s)

phototransformation in water
Type of information:
experimental study
Adequacy of study:
other information
4 (not assignable)
Rationale for reliability incl. deficiencies:
secondary literature
Study type:
indirect photolysis
no guideline followed
Principles of method if other than guideline:
Indirect photolysis by OH radicals
GLP compliance:
not specified
Type of sensitiser:
OH radical
Rate constant (for indirect photolysis):
2 200 000 000 other: L/(mol*sec)
Validity criteria fulfilled:
not applicable

Description of key information

The first order rate constant for photochemical oxidation in water by OH radicals was reported to be 2.2E09 L/mol*sec (Buxton et al., 1988). 

Key value for chemical safety assessment

Additional information