Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
basic toxicokinetics in vitro / ex vivo
Type of information:
experimental study
Adequacy of study:
other information
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Acceptable, well-documentd publication which meets basic scientific principles

Data source

Reference
Reference Type:
publication
Title:
Unnamed
Year:
1991
Report date:
1991

Materials and methods

Objective of study:
other: investigation of enzymatic deformylation reactions of aldehydes
Test guideline
Qualifier:
no guideline required
Principles of method if other than guideline:
Deformylation of aldehydes and reaction conditions were investigated in vitro using different isozymes of cytochrom P-450 in a reconstituted enzyme system.
GLP compliance:
no

Test material

Constituent 1
Chemical structure
Reference substance name:
2-methylbutyraldehyde
EC Number:
202-485-6
EC Name:
2-methylbutyraldehyde
Cas Number:
96-17-3
Molecular formula:
C5H10O
IUPAC Name:
2-methylbutanal
Details on test material:
- Name of test material (as cited in study report): 2-methylbutyraldehyde, α-branched C5-aldehyde
- test substance was obtained from Aldrich
- no further information on test substance
Radiolabelling:
no

Test animals

Species:
other: artifical in vitro test system

Results and discussion

Applicant's summary and conclusion

Conclusions:
The enzymatic reaction investigated is not a major pathway in the metabolism of 2-methylvaleraldehyde. There is no information if this reaction has any relevance in the in vivo metabolism of 2-methylbutyraldehyde. Findings for the reaction investigated are as follows.
For the formation of olefines by the reaction of aldehydes with cytochrom P-450, branching at the alpha-carbon of the aldehyde is required. The highest activity was observed with the substrate that exhibits the highest degree of branching (trimethylacetaldehyde > 2-methylbutyraldehyde > butyraldehyde). The relative activities of the P-450-isozymes studied are dependent on the substrate tested, varying isozymes being most active with different substrates.