Registration Dossier

Administrative data

Endpoint:
phototransformation in water
Type of information:
experimental study
Adequacy of study:
supporting study
Reliability:
3 (not reliable)

Data source

Reference
Reference Type:
publication
Title:
Unnamed
Year:
1937

Materials and methods

Study type:
direct photolysis
Test guideline
Qualifier:
no guideline followed
GLP compliance:
no

Test material

Constituent 1
Chemical structure
Reference substance name:
Acetaldehyde
EC Number:
200-836-8
EC Name:
Acetaldehyde
Cas Number:
75-07-0
Molecular formula:
C2H4O
IUPAC Name:
acetaldehyde
Details on test material:
Name of test material (as cited in study report): acetaldehyde

Study design

Analytical method:
other: according to standard methods. No more details stated.
Light source:
other: mercury arc

Results and discussion

% Degradationopen allclose all
% Degr.:
2.4
Sampling time:
30 min
Test condition:
Test concentration 0.25 mol/L
% Degr.:
6.9
Sampling time:
30 min
Test condition:
Test concentration 0.05 mol/L
% Degr.:
10.2
Sampling time:
30 min
Test condition:
Test concentration 0.025 mol/L
Transformation products:
not measured

Any other information on results incl. tables

It could be shown that the decomposition of acetaldehye was linearly dependent on the time when the concentration of the test solution was high enough. In this case, the absorption of light was complete during the illumination, which was not the case in the more diluted test solutions. During the illumination period of three hours, the test soluions remained clear and no formation of gas was observed. A small amount of acid was formed, not exceeding 5% in any of the test solution. The identity of any other degradation products is not mentioned.

Applicant's summary and conclusion

Validity criteria fulfilled:
not applicable