4-bromo-3,3,4,4-tetrafluorobut-1-ene

Melting point / freezing point

Link to relevant study record(s)

Reference

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

March 11, 2020 - March 13, 2020

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)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

differential scanning calorimetry

Key result

Melting / freezing pt.:

< -50 °C

Atm. press.:

>= 1 005.5 - <= 1 011.4 hPa

The test item was cooled down to -80　°C with a cooling rate of 1　K/min, -80　°C was kept for 30　min and afterwards the test item was heated up to 25 °C with a heating rate of 10　K/min. During cooling down the measurements did not show any exothermal effect (solidification) and either during heating up no endothermal effect (melting). Thus no melting was observed above -50 °C. No mass loss after the DSC measurements was detected.

The results of the DSC measurements are summarized in Table 1.

Table 1: Melting point (DSC measurements)

Ident No.	Test item　/ mg	Starting temperature / °C	Final test temperature　/ °C	Temperature range (endo-thermal)　/ °C	Onset (melting) / °C	Crucible	Observations after the measurement
39062	24.12	25	-80 °C	-	-	Aluminium with a hole	Test item was liquid
39066	13.47	25	-80 °C	-	-	Aluminium with a hole	Test item was liquid

Executive summary:

No melting point was measured above -80 °C. However, since melting may be hindered at low temperatures due to supercooling it should only be assumed that no melting point exists above -50 °C.

 

Description of key information

No melting point was measured above -80　°C. However, since melting may be hindered at low temperatures due to supercooling it should only be assumed that no melting point exists above -50　°C.