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

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:

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 102 (Melting point / Melting Range)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Deviations:

no

GLP compliance:

no

Type of method:

differential scanning calorimetry

Key result

Melting / freezing pt.:

>= 208 - <= 210 °C

Atm. press.:

1 013.25 hPa

Decomposition:

no

Sublimation:

no

Three DSC measurements with a heating rate of 10 K/min showed an endothermal effect (melting) in the temperature range of 200 - 225 °C. The onset temperature was derived from the intersection of the tangent line with the highest slope of the endothermal peak with the baseline. After two DSC measurements up to the final temperature of 500 °C the test item was a beige residue and a white melt, respectively and a mass loss of 6 % occurred. After DSC measurements up to the final temperature of 250 °C the test item was a white melt und no mass loss occurred.

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
38852	11.53	25	500	200 - 220	209.71	Aluminium with a hole	Test item was a beige residue Mass loss: 6%
38853	10.75	25	250	205 - 220	209.86	Aluminium with a hole	Test item was a white melt no mass loss
38856	10.24	25	500	205 - 225	208.83	Aluminium with a hole	Test item was a white melt Mass loss: 6%

 

The test item had a melting range of 208.0 °C to 210.0 °C.

Conclusions:

The melting point of the test item was determiend to be in range from 208.0 to 210.0 °C.

Executive summary:

A study was conducted according to OECD test guideline 102, Regulation (EC) No 440/2008 method A.1 and EPA OCSPP test guideline 830.7200 to determine the melting 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 – 11 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 at a constant heating rate (10 K/min) in a defined atmosphere (nitrogen).Three DSC measurements with a heating rate of 10 l(min showed an endothermal effect (melting) in the temperature range of 200 - 225 °C. The onset temperature was derived from the intersection of the tangent line with the highest slope of the endothermal peak with the baseline. The melting point of the test item was determiend to be in range from 208.0 to 210.0°C.

Description of key information

The melting point of the test item was determiend to be in range from 208.0 to 210.0°C.

Additional information

A study was conducted according to OECD test guideline 102, Regulation (EC) No 440/2008 method A.1 and EPA OCSPP test guideline 830.7200 to determine the melting 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 – 11 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 at a constant heating rate (10 K/min) in a defined atmosphere (nitrogen).Three DSC measurements with a heating rate of 10 l(min showed an endothermal effect (melting) in the temperature range of 200 - 225 °C. The onset temperature was derived from the intersection of the tangent line with the highest slope of the endothermal peak with the baseline. The melting point of the test item was determiend to be in range from 208.0 to 210.0°C.