Registration Dossier
Registration Dossier
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EC number: 224-030-0 | CAS number: 4170-30-3
Hydrolysis
Administrative data
- Endpoint:
- hydrolysis
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Reliability:
- 3 (not reliable)
- Rationale for reliability incl. deficiencies:
- other: Supporting information only as this annex point is not relevant for a registration of an intermediate.
Data source
Reference
- Reference Type:
- publication
- Title:
- Unnamed
- Year:
- 1 937
Materials and methods
Test guideline
- Qualifier:
- no guideline followed
- GLP compliance:
- no
Test material
- 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): trans-crotonaldehyde
- Analytical purity: 99.1% by bromine absorption
- Isomers composition: trans-isomer was tested
Constituent 1
- Radiolabelling:
- no
Study design
- Analytical monitoring:
- yes
Results and discussion
- Transformation products:
- not specified
Any other information on results incl. tables
Crotonaldehyde is reversibly hydrated to aldol in dilute aqueous solutions of acids. Hydration is first order with respect to acid and crotonaldehyde. Dehydration of aldol is first order with respect to acid and aldol. Energies of activation for hydration and dehydration are 18.23 and 24.4s kcal., respectively. Equilibrium is reached when 47% of the crotonaldehyde has been converted to aldol at 25°C and 39% at 35°C. Crotyl alcohol and trans-crotonic acid do not hydrate at an appreciable rate at 25°C in dilute aqueous nitric acid.
Applicant's summary and conclusion
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
