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Physical & Chemical properties

Melting point / freezing point

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Administrative data

Link to relevant study record(s)

Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
form 2020-02-05 to 2020-02-20
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:
1995
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Version / remarks:
2008
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
differential scanning calorimetry
Key result
Melting / freezing pt.:
< -90 °C
Decomposition:
no
Sublimation:
no

During the cooling phase down to -90 °C no thermal effects could be observed. In the subsequent heating phase no thermal effects could be detected up to room temperature, at which the test item is a liquid. Due to this result, it can be stated that the test item has no melting or freezing point down to a temperature of -90 °C. During the heating phase the test item showed an exothermic effect in the temperature range of 160 – 240 °C with an average energy release of -100 J/g. An endothermic effect was observed in the temperature range of 290 – 350 °C, which can be assigned to the boiling of the test item.

 

No.

Sample weight / mg

Onset of Effect / °C

Range of effect / °C

Weight loss / mg

Atmospheric pressure / hPa

PN19063

9.08

---
325.40

180 – 240 (exo)
320 – 350 (endo)

8.76

1022.3

PN19117

9.06

---
286.37

160 – 230 (exo)
290 – 340 (endo)

7.83

998.7

PN19133

9.80

---
293.12

170 – 230 (exo)
290 – 340 (endo)

9.29

1009.3
Conclusions:
No freezing point was observed down to -90 °C.
Executive summary:

The melting point of the test item was determined according to OECD test guideline 102 and Regulation EC No. 440/2008, Method A.1. Under ambient conditions, the test item is liquid. The tests were started at ambient temperature. The temperature was first decreased to -90 °C at a constant cooling rate of 0.25 K/min. After 30 min at -90 °C the temperature was increased up to 500 °C at a constant heating rate of 10 K/min. The endothermic effect in the temperature range of 290 – 350 °C was ascribed to the boiling point. No further thermal effects were observed up to the end temperature of 500 °C. Therefore, it is concluded that the test item has no melting point in the temperature range -90 °C to 500 °C.

Description of key information

No freezing point was observed down to -90 °C.

Key value for chemical safety assessment

Additional information

The melting point of the test item was determined according to OECD test guideline 102 and Regulation EC No. 440/2008, Method A.1. Under ambient conditions, the test item is liquid. The tests were started at ambient temperature. The temperature was first decreased to -90 °C at a constant cooling rate of 0.25 K/min. After 30 min at -90 °C the temperature was increased up to 500 °C at a constant heating rate of 10 K/min. The endothermic effect in the temperature range of 290 – 350 °C was ascribed to the boiling point. No further thermal effects were observed up to the end temperature of 500 °C. Therefore, it is concluded that the test item has no melting point in the temperature range -90 °C to 500 °C.