Crotonaldehyde

Phototransformation in water

Administrative data

Endpoint:

phototransformation in water

Type of information:

experimental study

Adequacy of study:

supporting study

Reliability:

3 (not reliable)

Rationale for reliability incl. deficiencies:

other: Supporting information

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:

Crotonaldehyde

EC Number:

224-030-0

EC Name:

Crotonaldehyde

Cas Number:

4170-30-3

Molecular formula:

C4H6O

IUPAC Name:

but-2-enal

Details on test material:

Name of test material (as cited in study report): crotonaldehyde

Study design

Analytical method:

other: according to standard methods. No more details stated.

Light source:

other: mercury arc

Duration of test at given test condition

Duration of test at given test condition 1

Duration:

30 min

Initial conc. measured:

0.25 mol/L

Duration of test at given test condition 2

Duration:

30 min

Initial conc. measured:

0.05 mol/L

Duration of test at given test condition 3

Duration:

30 min

Initial conc. measured:

0.025 mol/L

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

After a few minutes of illumination, insoluble solid condensation products were formed in the test solutions.

Applicant's summary and conclusion

Validity criteria fulfilled:

not applicable

Conclusions:

Only small percentage of crotonaldehyde decomposed under the conditions of the test.

Executive summary:

Aqueous solutions of crotonaldehyde at different concentrations were illuminated for 30 min with a mercury arc. At the end of the period, the remaining concentration was determined. The decomposition rate of crotonaldehyde under the conditions of the test was dependent of the initial concentration and reached a maximum of 10.2% at an initial test concentration of 0.025 mol/L. In addition, after a few minutes of exposure, insoluble condensation products were formed in the vessels.