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EC number: 289-108-9 | CAS number: 86014-62-2
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:
- 27 March 2017 - 09 January 2018
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Remarks:
- Study was conducted in accordance with international guidelines and in accordance with GLP. All guideline validity criteria were met.
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Version / remarks:
- Regulation (EC) 440/2008 of 30 May 2008
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Version / remarks:
- July 1995
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- differential scanning calorimetry
- Key result
- Melting / freezing pt.:
- < -100 °C
- Atm. press.:
- >= 999 - <= 1 002.8 hPa
- Decomposition:
- no
- Sublimation:
- no
- Remarks on result:
- other: Mean value.
- Remarks:
- Arising from 3 determinations.
- Conclusions:
- The melting point/ freezing point of the test item is < -100 ℃.
- Executive summary:
EU Method A.1. – The melting point/freezing point of the test item was determined using differential scanning calorimetry. The procedure employed was designed to be compatible with Method A.1. Melting/Freezing Temperature of Commission Regulation (EC) No 440/2008 of 30 May 2008.
Aliquots of test item (0.0013 - 0.0018 g) were placed in crucibles and subjected to a thermal program from -100 °C to 500 °C. Cooling at a constant rate of 0.25 K/min was followed by a waiting period of 30 minutes at -100 °C and heating at a constant rate of 10 K/min to 500 °C. Three determinations were carried out. All determinations were conducted under an inert atmosphere.
The freezing temperature of the test item was established as being < - 100 °C.
Reference
No. |
Sample weight / mg |
Onset of Effect / °C |
Range of effect / °C |
Weight loss / mg |
Atmospheric pressure / hPa |
PN13287 |
13.03 |
-26.37 |
-30 – 0 (endo) |
9.77 |
999.0 |
96.70 |
30 – 160 (endo) |
||||
182.38 |
180 – 260 (endo) |
||||
274.66 |
260 – 280 (endo) |
||||
--- |
280 – 410 (exo) |
||||
PN13300 |
17.72 |
-22.33 |
-30 – 0 (endo) |
13.20 |
1002.8 |
107.74 |
70 – 150 (endo) |
||||
241.92 |
200 – 260 (endo) |
||||
274.01 |
260 – 280 (endo) |
||||
--- |
280 – 320 (exo) |
||||
PN13476 |
18.37 |
-30.93 |
-40 – 0 (endo) |
14.68 |
1001.3 |
105.43 |
70 – 150 (endo) |
||||
244.37 |
150 – 250 (endo) |
||||
258.94 |
250 – 280 (endo) |
||||
--- |
280 – 320 (exo) |
During the cooling phase, no thermal effects were observed, which can be assigned to the freezing of the test item.
During the heating phase a very small endothermic effect was observed in the temperature range of -40 to 0 °C.
These endothermic effects were investigated. 6.6 g of the test item was cooled in a test tube using liquid nitrogen to approx. -60 °C. At approx. -30 °C the test item changed consistency and colour, from a very viscous transparent liquid to a white mass (without achieving a solid state). When warmed from -60 °C to ambient temperature, the appearance of the test item returned to being a viscous and transparent liquid at approx. -20 °C. From these observations, it can be concluded these endothermic effects are not associated with melting or freezing as a phase transition did not occur.
Description of key information
Melting Point: < -100°C; EU Method A.1.; H Smeykal (2017)
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- -100 °C
Additional information
EU Method A.1. – The melting point/freezing point of the test item was determined using differential scanning calorimetry. The procedure employed was designed to be compatible with Method A.1. Melting/Freezing Temperature of Commission Regulation (EC) No 440/2008 of 30 May 2008.
Aliquots of test item (0.0013 - 0.0018 g) were placed in crucibles and subjected to a thermal program from -100 °C to 500 °C. Cooling at a constant rate of 0.25 K/min was followed by a waiting period of 30 minutes at -100 °C and heating at a constant rate of 10 K/min to 500 °C. Three determinations were carried out. All determinations were conducted under an inert atmosphere.
The freezing temperature of the test item was established as being < - 100 °C.
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