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EC number: 944-170-2 | CAS number: -
Boiling point
Administrative data
Link to relevant study record(s)
- Endpoint:
- boiling point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.2 (Boiling Temperature)
- Version / remarks:
- 2008
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 103 (Boiling point/boiling range)
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- other: differential scanning calorimetry / thermogravimetric analysis
- Decomposition:
- yes
- Decomp. temp.:
- > 216 °C
- Conclusions:
- No boiling point was detected; decomposition starts at > 216°C.
- Executive summary:
The boiling point of C8 -10 Alkylamidopropyl betaine was determined according to OECD Guideline 103 and EU method A.2 using differential scanning calorimetry and thermogravimetric analysis.
Above 240°C (onset) the weight continuously decreased and reached a loss of approx. 82% at 500°C.
The DSC test traces at 216.7°C (onset) an endothermic signal that could be allocated to a boiling behaviour, however, from the knowledge of the chemical structures this endotherm is most likely allocated to a degradation process.
This assumption can also be deduced from the literature, as it is well known that quaternary structures tend to degrade above temperatures of 120°C (Hoffmann degradation; reversed Menshutkin reaction).
Reference
Above 240 °C (onset) the weight continuously decreased and reached a loss of approx. 82 % at 500 °C. The remaining residue mainly corresponds to the sodium chloride content. The DSC test traces at 216.7 °C (onset) an endothermic signal that could be allocated to a boiling behaviour, however, from the knowledge of the chemical structures this endotherm is most likely allocated to a degradation process. This assumption can also be deduced from the literature, as it is well known that quaternary structures tend to degrade above temperatures of 120 °C (Hoffmann degradation; reversed Menshutkin reaction).
Description of key information
No boiling point detected; decomposition starts at > 216°C (OECD TG 102/EU method A.2; differential scanning calorimetry / thermogravimetric analysis; RL1)
Key value for chemical safety assessment
Additional information
The boiling point of C8-10 Alkylamidopropyl betaine was determined according to OECD Guideline 103 and EU method A.2 using differential scanning calorimetry and thermogravimetric analysis.
Above 240°C (onset) the weight continuously decreased and reached a loss of approx. 82% at 500°C.
The DSC test traces at 216.7°C (onset) an endothermic signal that could be allocated to a boiling behaviour, however, from the knowledge of the chemical structures this endotherm is most likely allocated to a degradation process.
This assumption can also be deduced from the literature, as it is well known that quaternary structures tend to degrade above temperatures of 120°C (Hoffmann degradation; reversed Menshutkin reaction).
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