Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 203-533-9 | CAS number: 107-93-7
Boiling point
Administrative data
Link to relevant study record(s)
- Endpoint:
- boiling point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- data from handbook or collection of data
- Principles of method if other than guideline:
- Classical method, no details reported
- Type of method:
- other: not specified
- Key result
- Boiling pt.:
- 185 °C
- Atm. press.:
- 760 Torr
- Conclusions:
- The boiling point of the test item is 185°C at atmosperic pressure.
Reference
Description of key information
The boiling point of crotonic acid is > 185°C
Key value for chemical safety assessment
- Boiling point at 101 325 Pa:
- 185 °C
Additional information
According to all available data, the effective boiling point of crotoinc acid is within the range of 185 - 199.5 °C. M. B. Hocking (Canadian Journal of Chemistry Vol. 50, 1972, page 1224 ff) reports a thermal cis-trans isomerisation of crotonic acid. The equilibrium at temperatures around the boiling point shows a cis/trans ratio of 0.16 - 0.18 and the presence of about 20% of dimers. Based upon these findings it seems obvious that the wide range reported for the boiling point of crotonic acid is due to the thermal isomerisation process.
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.
