N,N-Bis-(4-biphenyl)amine

Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2019-10-08 to 2019-10-09

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling Point)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.2 (Boiling Temperature)

Deviations:

no

GLP compliance:

no

Type of method:

differential scanning calorimetry

Key result

Boiling pt.:

>= 450 °C

Atm. press.:

1 013.25 hPa

Decomposition:

yes

Two DSC measurements in aluminium crucibles with a hole showed neither an endothermal nor an exothermal effect after the melting in the temperature range of 205 - 225 °C. The mass loss after the DSC measurements amounted to 6 %.

Boiling point (DSC measurement)

Ident No.	Test item / mg	Starting temperature / °C	Final test temperature / °C	I Temperature range / °C	Onset (boiling) / °C	Crucible	Observations after the measurement
38852	11.53	25	500	—	—	Aluminium with a hole	Test item was a beige residue Mass loss: 6 %
38856	10.24	25	500	--	—	Aluminium with a hole	Test item was a white melt Mass loss: 6%

The test item had no boiling point up to 500 °C under atmospheric conditions. The test item decomposed.

Conclusions:

The test item has no boiling point up to 450 °C and decompose.

Executive summary:

A study was conducted according to OECD test guideline 103, Regulation (EC) No 440/2008 method A.2 to determine the boiling point of the test item using differential scanning calorimetry. The test item was weighed out into an aluminium crucible under an inert atmosphere (nitrogen). Two tests with about 10 – 18 mg of the test item were performed. As reference crucible, an empty aluminium crucible was used. The test item and the reference were heated up from the starting temperature to the final temperature of 500 °C at a constant heating rate (10 K/min) in a defined atmosphere (nitrogen). The measurements in aluminium crucibles with a hole showed an endothermal effect (melting) in the temperature range of 110 - 155 °C No further endothermal effect could be observed after melting up to approx. 450 °C. Above approx. 450 °C the baseline showed an ambiguous behavior. Therefore it could only be stated that there is no boiling point up to 450 °C

Description of key information

The test item has no boiling point up to 450 °C and decomposes (reference 4.3 -1).

Additional information

A study was conducted according to OECD test guideline 103, Regulation (EC) No 440/2008 method A.2 to determine the boiling point of the test item using differential scanning calorimetry. The test item was weighed out into an aluminium crucible under an inert atmosphere (nitrogen). Two tests with about 10 – 18 mg of the test item were performed. As reference crucible, an empty aluminium crucible was used. The test item and the reference were heated up from the starting temperature to the final temperature of 500 °C at a constant heating rate (10 K/min) in a defined atmosphere (nitrogen). The measurements in aluminium crucibles with a hole showed an endothermal effect (melting) in the temperature range of 110 - 155 °C No further endothermal effect could be observed after melting up to approx. 450 °C. Above approx. 450 °C the baseline showed an ambiguous behavior. Therefore it could only be stated that the test item has no boiling point up to 450 and starts to decompose. °C