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EC number: 220-076-0 | CAS number: 2623-23-6
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:
- 10-Oct-2014 to 14-Oct-2014
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Reason / purpose for cross-reference:
- reference to same study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7200 (Melting Point / Melting Range)
- Qualifier:
- according to guideline
- Guideline:
- other: CIPAC MT 1 (2009)
- GLP compliance:
- no
- Type of method:
- differential scanning calorimetry
- Key result
- Melting / freezing pt.:
- < -84.5 °C
- Atm. press.:
- 996 hPa
- Conclusions:
- A melting point value of <-84.5 °C (at 996 hPa) was determined for the test substance according to E.U. Method A.1.
Reference
Results
In the thermograms of the DSC (runs PN7670 and PN7685) an endothermic effect (melting) was observed in the temperature range of -90 °C to -70 °C. Between 140 – 270 °C a second endothermic effect (boiling) could be detected.
Results of the DSC measurements
No. |
Sample weight (mg) |
Onset of effect (°C) |
Range of effect (°C) |
Weight loss (mg) |
Atmospheric pressure (hPa) |
PN7670 |
13.48 |
-84.68 228.60 |
-85 to -70 (endo) 150 – 270 (endo) |
13.48 |
995.8 |
PN7685 |
13.66 |
-84.25 228.55 |
-85 to -70 (endo) 140 – 260 (endo) |
13.66 |
996.0 |
Final Results
The test item has a melting point of -84.5 °C at atmospheric pressure (996 hPa) as determined by differential scanning calorimetry according to Regulation EC No. 440/2008 Method A.1., OECD Test Guideline 102 (1995), EPA OCSPP 830.7200 (1998) and CIPAC MT 1 (2009).
Description of key information
Melting point: <-84.5 °C at 996 hPa (EU Method A.1, differential scanning calorimetry)
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- -84.5 °C
Additional information
A melting point value of <-84.5 °C (at 996 hPa) was determined for the test substance according to E.U. Method A.1.
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