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Environmental fate & pathways

Phototransformation in water

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Endpoint:
phototransformation in water
Type of information:
experimental study
Adequacy of study:
disregarded due to major methodological deficiencies
Study period:
1998
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
documentation insufficient for assessment
Study type:
direct photolysis
Qualifier:
no guideline followed
GLP compliance:
no
Analytical method:
high-performance liquid chromatography
Light source:
other: Rayonet RPR-208 merry-go-round photoreactor
Quantum yield (for direct photolysis):
1.22

Result reported in the publication: logY = 0.085

Conclusions:
In a test on photodegradation in aqueous solution, the quantum yield was determined to logY = 0.085. As no degradation half-life in the environment was derived, the study is not useful for the exposure assessment and is therefore disregarded.
Endpoint:
phototransformation in water
Type of information:
experimental study
Adequacy of study:
disregarded due to major methodological deficiencies
Study period:
1996
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
documentation insufficient for assessment
Qualifier:
no guideline followed
GLP compliance:
no
Specific details on test material used for the study:
Name in the publication: p-An-Cl
obtained from Aldrich (highest purity available)
Rate constant (for indirect photolysis):
760 other: /min
Conclusions:
In a test on photodegradation with TiO2 as catalyst, a first-order rate constant of 760/min was determined.
As no degradation half-life in the environment was derived, the study is not useful for the exposure
assessment and is therefore disregarded.

Description of key information

In a test on photodegradation in aqueous solution, the quantum yield was determined to logY = 0.085.

In a further test on photodegradation with TiO2 as catalyst, a first-order rate constant of 760/min was determined.

As no degradation half-life in the environment was derived, both studies are not useful for the exposure assessment and are therefore disregarded.

Key value for chemical safety assessment

Additional information