Registration Dossier
Registration Dossier
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EC number: 695-930-2 | CAS number: 13676-53-4
Melting point / freezing point
Administrative data
Link to relevant study record(s)
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2017-03-14 to 2017-03-16
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Version / remarks:
- adopted 27 July, 1995
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Version / remarks:
- 30 May, 2008
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- differential scanning calorimetry
- Key result
- Melting / freezing pt.:
- 120 °C
- Atm. press.:
- 1 013 Pa
- Decomposition:
- yes
- Remarks:
- after melting
- Sublimation:
- no
- Remarks on result:
- other: decomposition temperature not measureable with DSC
- Conclusions:
- In the present study according to OECD Guideline 102, the melting point of the test item was determined to be 120°C.
Reference
Preliminary test:
Three steps were registered with maxima at 120 °C, 270 °C resp. 470 °C. A total mass loss of 53.2 % at the final temperature could be observed (mass change in the range until 180 °C: 0.9 %; mass change in the range from 180 to 360 °C: 2.0 %, mass change in the range from 360 °C to 600 °C: 50.4 %;). No significant mass loss occurred due to purging.
Main test:
The DSC measurements were performed twice in the temperature range from 20 - 600 °C resp. from 20 - 350°C. A sharp endothermic peak indicating a melting point could be observed (peak maximum: 126 °C/126 °C; extrapolated onset temperature: 120.68 °C/ 120.27 °C; rounded mean of both determinations: 120 °C).
Upon further heating the DSC-curve showed two more peaks: one exothermic peak (peak maximum: 250 °C/ 251 °C) followed by an endothermic peak (peak maximum: 471 °C). The first one is probably due to exothermic decomposition after melting. The second one may be a result of a partial boiling of the decomposed test item. Due to the fact that the thermogravimetric measurement as well as the DSC-measurement did not show a complete mass loss in that temperature range, no normal boiling point could be observed.
Description of key information
- OECD 102 guideline study, GLP, Melting Point: 120°C at 1013 hPa.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 120 °C
Additional information
In the present study according to OECD Guideline 102, the melting point of the test item was determined to be 120°C.
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