Acetaldehyde

Phototransformation in water

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

Test material information

Constituent 1

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

% Degradation

% Degradation 1

% Degr.:

2.4

Sampling time:

30 min

Test condition:

Test concentration 0.25 mol/L

% Degradation 2

% Degr.:

6.9

Sampling time:

30 min

Test condition:

Test concentration 0.05 mol/L

% Degradation 3

% 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