4-Ethoxy-2,3-difluoro-4'-methyl-1,1'-biphenyl

Stability: thermal, sunlight, metals

Link to relevant study record(s)

Reference

Endpoint:

thermal stability

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2018-09-24 to 2018-09-25

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:

OECD Guideline 113 (Screening Test for Thermal Stability and Stability in Air)

Deviations:

no

GLP compliance:

no

Test substance thermally stable:

yes

Key result

Operating temp.:

>= 25 - <= 350 °C

Test substance stable to sunlight:

not determined

Test substance stable to metals / metal ions:

not determined

Two DSC-measurements in closed glass crucibles with the test item showed an endothermal effect in the temperature range of 55 - 80 °C and an exothermal effect in the temperature range of 370 - 500 °C wíth a maximum energy release of 330 J/g.

 

Ident-No.	Weight /mg	Final temperature /°C	Temperature range /°C	Type of effect	Energy /J/g
38207	10.98	500	55-80 370 - 495	Endothermal Exothermal	n.r. 325
38209	13.60	500	55-80 395 - 500	Endothermal Exothermal	n.r. 330

 

 

Conclusions:

The test item was considered to be thermal stable at room temperature.

Executive summary:

A study was conducted according to OECD TG 113 to determine the thermal stability of the test item using DSC measurement. The test item was weighed into a closed glass crucible under nitrogen. For the test on thermal stability, the crucibles were heated up from ambient temperature to 500 °C with a heating rate of 3 K/min. Two DSC-measurements in closed glass crucibles with the test item showed an endothermal effect in the temperature range of 55 - 80 °C and an exothermal effect in the temperature range of 370 - 500 °C with a maximum energy release of 330 J/g. According to the OECD TG 113 criteria, the test item was considered to be thermal stable at room temperature as no decomposition or chemical transformation was found below 150 °C.

Description of key information

The test item was considered to be thermally stable at room temperature.

Additional information

A study was conducted according to OECD TG 113 to determine the thermal stability of the test item using DSC measurement. The test item was weighed into a closed glass crucible under nitrogen. For the test on thermal stability, the crucibles were heated up from ambient temperature to 500 °C with a heating rate of 3 K/min. Two DSC-measurements in closed glass crucibles with the test item showed an endothermal effect in the temperature range of 55 - 80 °C and an exothermal effect in the temperature range of 370 - 500 °C with a maximum energy release of 330 J/g. According to the OECD TG 113 criteria, the test item was considered to be thermally stable at room temperature as no decomposition or chemical transformation was found below 150 °C.