Registration Dossier
Registration Dossier
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EC number: 484-470-6 | CAS number: 623-40-5
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:
- 2008
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Reason / purpose for cross-reference:
- reference to same study
- Reason / purpose for cross-reference:
- reference to same study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 103 (Boiling point/boiling range)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.2 (Boiling Temperature)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- differential scanning calorimetry
- Boiling pt.:
- 172 °C
- Atm. press.:
- 101.7 kPa
Reference
The boiling point of MPKO is 172°C at an atmospheric pressure of 101.7 kPa
No exothermic effect was observed up to a temperature of 400 °C.
1st experiment (-90 to 400 °C)
During cooling, no effects were observed which were due to crystallization. During heating, the signal became slightly exothermic and thereafter slightly endothermic between -75 and -25 °C. These effects were due to crystallization followed by melting. Between 150 and 200 °C, an endothermic boiling peak was observed with an extrapolated onset of 172 °C.
2nd experiment (-90 to 200 °C)
A repeated heating cycle was used in order to crystallize the test substance and to determine the extrapolated onset of the melting peak. During the second heating, two endothermic peaks were seen. The melting peak was seen between -50 and -25 °C, with and extrapolated onset of -44 °C. The boiling peak occurred between 150 and 200 °C, with extrapolated onset of 172 °C.
3rd and 4th experiments (-90 to 25 °C)
After the first heating, the temperature was kept isothermal at -50 °C in order to crystallize the test substance completely. During the second heating, a small endothermc peak followed by a larger endothermic peak were seen between -70 °C and -20 °C. The extrapolated onset temperature of the larger melting peak was determined to be -45 °C in both experiments.
Description of key information
172 °C at ca. 101.7 kPa (DSC, OECD 103)
Key value for chemical safety assessment
- Boiling point at 101 325 Pa:
- 172 °C
Additional information
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