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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 944-170-2 | CAS number: -
Melting point / freezing point
Administrative data
Link to relevant study record(s)
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: Guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Version / remarks:
- 2008
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- other: melt microscope / differential scanning calorimetry
- Melting / freezing pt.:
- >= 139.3 - <= 154.6 °C
- Conclusions:
- A melting range of 139.3°C to 154.6°C was determined by DSC (OECD TG 102 / EU method A.1).
- Executive summary:
The melting point of C8 -10 Alkylamidopropyl betaine was determined according to OECD Guideline 102 and EU method A.1 using a melt microscope and differential scanning calorimetry. A melting range of 139.3°C to 154.6°C was measured by DSC which is in a good accordance to the visual observation 140°C (onset-temperature of change) and 154°C (cloudy melt).
Reference
In the melt microscope an onset-temperature of 140 °C was observed, at 154 °C a cloudy melt could be observed. No clear point was reached up to 210 °C. The clouding is probably sodium chloride.
For the determination of the melting range, the main DSC test was performed in triplicate. The melting ranges were read from the second and the third heating run of each test as extrapolated onset and extrapolated endset of the allocated melting peak. After the test procedure, the samples were re-weighed in order to check for a significant sample loss indicating a potential interfering non-melting processes. For none of the samples a significant weight loss was recorded (<1%).
As an average a melting range of 139.3 °C to 154.6 °C was measured by DSC which is in a good accordance to the visual observation 140 °C (onset-temperature of change) and 154 °C (cloudy melt).
Description of key information
melting range: 139.3°C to 154.6°C (OECD TG 102 / EU method A.1; melt microscope / differential scanning calorimetry; RL1)
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 140 °C
Additional information
The melting point of C8 -10 Alkylamidopropyl betaine was determined according to OECD Guideline 102 and EU method A.1 using a melt microscope and differential scanning calorimetry. A melting range of 139.3°C to 154.6°C was measured by DSC which is in a good accordance to the visual observation 140°C (onset-temperature of change) and 154°C (cloudy melt).
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.
