Registration Dossier
Registration Dossier
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EC number: 230-711-3 | CAS number: 7287-19-6
Boiling point
Administrative data
Link to relevant study record(s)
- Endpoint:
- boiling point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 26 Apr 199 to 23 May 2000
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 103 (Boiling Point)
- Version / remarks:
- Julu 1995
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.2 (Boiling Temperature)
- Version / remarks:
- December 1992
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7220 (Boiling Point / Boiling Range)
- Version / remarks:
- August 1996
- GLP compliance:
- yes
- Type of method:
- differential scanning calorimetry
- Remarks:
- using a Mettler FP90 central processor and a FP81HT MBC cell.
- Key result
- Atm. press.:
- 97.8 kPa
- Decomposition:
- yes
- Decomp. temp.:
- 190.7 °C
- Conclusions:
- The test substance decomposed before the boiling point is reached. In air, weak oxidative decomposition was observed starting around 190 °C. Thereafter, a stronger, thermal decomposition occurs. A determination of the boiling point is therefore not possible.
- Executive summary:
To determine the boiling temperature of the test substance a study was performed according to OECD 103 in compliance with GLP. Due to thermal decomposition of the test substance at a temperature lower than that of the boiling point, it was not possible to determine the boiling point at normal pressure. Using differential scanning calorimetry it could be determined that thermal decomposition starts at about 257 °C under a nitrogen atmosphere and weak oxidative decomposition starts at 190 °C in air .
Reference
In order to interpret the observations made, additional investigations were performed under GLP, using DSC. A Perkin Elmer 7 Series Thermal Analysis System was used. The thermal behavior of the test substance was investigated, not only in air, but also under a nitrogen atmosphere, using a heat rate of 10.0 °C / minute and starting from 25. °C.
- Under nitrogen, decomposition was observed to commence at about 257 °C, with peak maximum of about 351 °C.
- In air, however, a weak, initial decomposition commenced at about 190 °C with a peak maximum of about 250 °C. Subsequently, a second, stronger decomposition with a peak maximum of about 350 °C occurred.
Therefore, the initial decomposition is oxidative in nature. In neither curve was any evidence of boiling observed.
Description of key information
The substance decomposes before boiling at about 190 °C, OECD 103, DSC, Das R, 2000.
Key value for chemical safety assessment
- Temperature of decomposition (state purity):
- 190 °C
Additional information
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.
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