Registration Dossier

Administrative data

Endpoint:
hydrolysis
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Test was conducted according to Directive 84/449/EEG, C.10 and compliant with GLP.

Data source

Reference
Reference Type:
other: Body responsible for the test
Title:
Unnamed
Year:
1991

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
other: Directive 84/449/EEC, C.10 (Hydrolyse)
Deviations:
not specified
GLP compliance:
yes

Test material

Reference
Name:
Unnamed
Type:
Constituent

Study design

Duration of testopen allclose all
Duration:
5 d
pH:
4
Duration:
5 d
pH:
7

Results and discussion

Total recovery of test substance (in %)open allclose all
% Recovery:
< 10
pH:
4
Temp.:
50 °C
Duration:
5 d
% Recovery:
< 10
pH:
7
Temp.:
50 °C
Duration:
5 d

Any other information on results incl. tables

At pH 4 and 7 and 50 degree C the hydrolysis within 5 days < 10%.

Applicant's summary and conclusion

Conclusions:
The substance is not readily biodegradable. It will degrade in the presence of light in the water, but not in the dark.
Executive summary:

The substance does not contain hydrolysable groups. It is estimated that the substance has a low potential to hydrolyse in the dark (note the hydrolysis testing was performed according to Directive 84/449/EEC, C.10 and based on the test conditions, photolytic interference should be avoided by appropriate means). The substance is stable in acidic and neutral pH conditions. There is no information about whether it undergoes hydrolysis at alkaline conditions. Based on the test result, hydrolysis in the absence of light is not expected.

However, its eco-toxicological information showed that the substance has a poor stability. As the substance is a photoinitiator, it would be expected to rapidly degrade in the environment upon exposure to nature light.