Registration Dossier
Registration Dossier
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EC number: 204-699-5 | CAS number: 124-41-4
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)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 103 (Boiling point/boiling range)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- differential scanning calorimetry
- Remarks:
- additionally: thermogravimetry
- Atm. press.:
- ca. 1 atm
- Decomposition:
- yes
- Decomp. temp.:
- 350 - ca. 430
- Remarks on result:
- other: the substance decompose without melting or boiling
- Conclusions:
- Taking into account all results and observations described in the commentay field above, no melting was observed prior to decomposition of the substance in the region of 350 to 430 °C. Because this decomposition process apparenty changes the identity of the substance, no melting or boiling point can be assigned to sodium methanolate. The residue of the decomposition process can assumed to be NaOH/Na2O and elementary carbon. The effects at 66 °C seem to be of relatively small and may be caused by the evaporation of minor amounts of humidity or recrystallisation effects.
- Executive summary:
The substance decomposes above 350 °C before any melting and boiling processes take place.
Reference
Parallel to the DSC measurement the mass loss was determined with a thermo balance during temperature rising. The residues in the crucibles were visually examined after the DSC and thermogravimetric experiment.
There was a small endothermic effect at 60 °C accompanied by a mass loss of 0.1 %. Beginning at 350 °C (up to 430 °C) the thermogravimetry showed a mass loss of 8.3 %. Also beginning at about 350 °C the DSC showed a strong endothermic effect. The character of the black residues found in the crucibles after the experiment indicated, that no melting process had taken place before.
Description of key information
The substance decomposes above 350 °C before any melting and boiling processes take place.
Key value for chemical safety assessment
Additional information
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