Registration Dossier
Registration Dossier
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EC number: 944-953-9 | CAS number: 73326-59-7
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:
- from 2017-04-07 to 2017-06-06
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7200 (Melting Point / Melting Range)
- Deviations:
- no
- GLP compliance:
- no
- Remarks:
- This study was not performed under the Principles of Good Laboratory Practice (GLP).
- Type of method:
- differential scanning calorimetry
- Key result
- Melting / freezing pt.:
- >= -13 - <= -11 °C
- Atm. press.:
- 1 013.25 hPa
- Conclusions:
- The test item has a melting range of -11 to -13 °C at atmospheric pressure (1013 hPa) as determined by differential scanning calorimetry according to Regulation EC No. 440/2008 Method A.1. and OECD Test Guideline 102 (1995).
- Executive summary:
A study was conducted according to OECD TG 102, Regulation (EC) No 440/2008 method A.1 and EPA OPPTS 830.7200 to determine the freezing point of the test item using differential scanning calorimetry. The test item was weighed into an aluminium crucible under an inert atmosphere (nitrogen). Two tests with about 16 – 17 mg of the test item were performed. As reference crucible, an empty aluminium crucible was used. The substance is a liquid at ambient conditions. Therefore, the crucibles were cooled down from ambient temperature to -100 °C with a constant cooling rate of 0.25 K/min under an inert atmosphere. After a waiting period of 30 min at -100 °C, the temperature was increased up to 500 °C at a constant heating rate of 10 K/min. In the temperature range of -40 °C to 10 °C, an endothermic effect was observed.As the onset temperatures in both tests deviate by more than 0.5 K from their mean value of -12.40 °C, the test item has a melting range of -11 to -13 °C.Therefore, the test itemhas a melting range of -11 to -13 °C at atmospheric pressure (1013 hPa).
Reference
During the cooling phase, an exothermic effect was observed in the temperature range from -50 to -20 °C, which can be assigned to the freezing of the test item.
During the subsequent heating phase, an endothermic effect was observed in the temperature range of -40 to 10 °C, which can be assigned to the melting of the test item. As the onset temperatures in both tests deviate by more than 0.5 K from their mean value of -12.40 °C, the test item has a melting range of -11 to -13 °C.
Description of key information
The test item has a melting range of -11 to -13 °C at atmospheric pressure (1013 hPa) as determined by differential scanning calorimetry according to Regulation EC No. 440/2008 Method A.1. and OECD Test Guideline 102 (1995).
Key value for chemical safety assessment
Additional information
A study was conducted according to OECD TG 102, Regulation (EC) No 440/2008 method A.1 and EPA OPPTS 830.7200 to determine the freezing point of the test item using differential scanning calorimetry. The test item was weighed into an aluminium crucible under an inert atmosphere (nitrogen). Two tests with about 16 – 17 mg of the test item were performed. As reference crucible, an empty aluminium crucible was used. The substance is a liquid at ambient conditions. Therefore, the crucibles were cooled down from ambient temperature to -100 °C with a constant cooling rate of 0.25 K/min under an inert atmosphere. After a waiting period of 30 min at -100 °C, the temperature was increased up to 500 °C at a constant heating rate of 10 K/min. In the temperature range of -40 °C to 10 °C, an endothermic effect was observed.As the onset temperatures in both tests deviate by more than 0.5 K from their mean value of -12.40 °C, the test item has a melting range of -11 to -13 °C.Therefore, the test itemhas a melting range of -11 to -13 °C at atmospheric pressure (1013 hPa).
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