Registration Dossier
Registration Dossier
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EC number: 227-774-4 | CAS number: 5977-14-0
Boiling point
Administrative data
- Endpoint:
- boiling point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2012
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: well performed and documented experiment
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 012
- Report date:
- 2012
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- other: company SOP
- Deviations:
- not specified
- GLP compliance:
- no
- Type of method:
- differential scanning calorimetry
Test material
- Reference substance name:
- Acetoacetamide
- EC Number:
- 227-774-4
- EC Name:
- Acetoacetamide
- Cas Number:
- 5977-14-0
- Molecular formula:
- C4H7NO2
- IUPAC Name:
- acetoacetamide
Constituent 1
Results and discussion
Boiling pointopen allclose all
- Boiling pt.:
- 155.7 °C
- Atm. press.:
- ca. 1 atm
- Decomposition:
- yes
- Decomp. temp.:
- > 130 °C
- Remarks on result:
- other: The slightly lower onset in the decomposition test (130 °C) is probably due to the lower heating rate used (3 K/min).
- Boiling pt.:
- 145.4 °C
- Atm. press.:
- ca. 1 atm
- Decomposition:
- yes
- Decomp. temp.:
- > 130 °C
- Remarks on result:
- other: The slightly lower onset in the decomposition test (130 °C) is probably due to the lower heating rate used (3 K/min).
Any other information on results incl. tables
The DSC trace shows a well-defined melting peak (onset approx. 55 °C) and an endothermic boiling peak in the 150 – 195 °C region . The peak is broader than for a typical boiling peak. The second measurement used a larger hole in case there was a problem with residues blocking the hole, and a nitrogen purge to prevent oxidation. The result was consistent with the first measurement, indicating that these effects are not significant.
After the end of the second measurement the pan was opened. It contained brown residue, indicating that decomposition had occurred during boiling.
Measurement |
Onset °C |
Peak °C |
1 |
155,7 |
177,1 |
2 |
145,4 |
174,4 |
The mean onset, 151 °C, is taken as the start of boiling. The difference between the two values is used a rough estimate of the uncertainty.
Applicant's summary and conclusion
- Conclusions:
- Boiling point: start of boiling 151 ±6 °C (decomposes on boiling)
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