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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Administrative data

Endpoint:
phototransformation in air
Type of information:
experimental study
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Meets generally accepted scientific standards

Data source

Reference
Reference Type:
publication
Title:
Unnamed
Year:
1939

Materials and methods

Test guideline
Qualifier:
no guideline followed
GLP compliance:
no

Test material

Constituent 1
Chemical structure
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

Light source:
other: high pressure, direct current mercury arc and a crystal quartz monochromator
Light spectrum: wavelength in nm:
>= 238 - <= 366
Duration of test at given test condition
Temp.:
30 °C

Results and discussion

Transformation products:
yes
Identity of transformation products
No.:
#1
Reference
Reference substance name:
Unnamed
IUPAC name:
but-2-enoic acid
Inventory number:
InventoryMultipleMappingImpl [inventoryEntryValue=EC 223-077-4]
CAS number:
3724-65-0

Any other information on results incl. tables

Table 1: Quantum yields obtained at different wave lengths

Test

No

Wavelength

[nm]

Quantum yield

F

1

366

0.026

2

313

0.076

3

313

0.086

4

313

0.12

5

280.4

0.21

6

280.4

0.35

7

280.4

0.40

8

280.4

0.39

9

253.7

0.39

10

253.7

0.45

11

253.7

1.43

12

253.7

1.20

13

253.7

3.22

14

253.7

3.16

15

238

0.61

Applicant's summary and conclusion

Validity criteria fulfilled:
not applicable
Executive summary:

The photochemical oxidation of crotonaldehyde vapour by oxygen gas has been investigated. With other conditions constant, the quantum yield of oxidation to crotonic acid increased steadily over the wave length range 366 to 238 nm.