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EC number: 700-701-8 | CAS number: 798556-07-7
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:
- 19.08.2011 - 09.11.2011
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- differential scanning calorimetry
- Key result
- Melting / freezing pt.:
- 82.3 °C
- Atm. press.:
- 1 013.3 hPa
- Decomposition:
- no
- Sublimation:
- no
- Conclusions:
- The melting point of the test substance was found to be 82.3 °C.
- Executive summary:
A study was conducted according to OECD TG 102 and Regulation (EC) No 440/2008 method A.1 to determine the melting point of the test item using differential scanning calorimetry. The test item was weighed into an aluminium crucible under an inert atmosphere (nitrogen). Four individual measurements with about 9 to 14 mg of the test item were performed. The crucibles were heated from room temperature to 150 and 500 °C with 10 K/min heating rate. The melting point of the test item was determined to be 82.3 °C at atmospheric pressure (1013 hPa).
Reference
Four measurements in aluminium crucibles with a hole showed an endothermic effect (melting) in the temperature range 75 °C to 95 °C with an onset temperature of 82.1 °C to 82.5 °C.
Ident-No. |
Onset /°C |
Temperature range /°C |
Crucible |
32097 |
82.23 |
75 - 95 |
Aluminium crucible with a hole |
32098 |
82.14 |
75 - 95 |
Aluminium crucible with a hole |
32100 |
82.32 |
75 - 95 |
Aluminium crucible with a hole |
32101 |
82.53 |
75 - 95 |
Aluminium crucible with a hole |
The test item had a mean melting point of 82.3 °C under atmospheric conditions.
The smaller endothermic effect observed in the DSC-measurements at about 130 °C is assumed to result from phase transition of the liquid crystalline structure of the test item.
Description of key information
The melting point of the test substance was found to be 82.3 °C.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 82.3 °C
Additional information
A study was conducted according to OECD TG 102 and Regulation (EC) No 440/2008 method A.1 to determine the melting point of the test item using differential scanning calorimetry. The test item was weighed into an aluminium crucible under an inert atmosphere (nitrogen). Four individual measurements with about 9 to 14 mg of the test item were performed. The crucibles were heated from room temperature to 150 and 500 °C with 10 K/min heating rate. The melting point of the test item was determined to be 82.3 °C at atmospheric pressure (1013 hPa) (reference 4.2-1).
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