1,1'-(chlorophenylmethylene)bis[4-methoxybenzene]

Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2017-09-21 to 2018-02-14

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling Point)

Qualifier:

according to guideline

Guideline:

EU Method A.2 (Boiling Temperature)

GLP compliance:

no

Type of method:

differential scanning calorimetry

Key result

Atm. press.:

1 013.3 hPa

Decomposition:

yes

Decomp. temp.:

ca. 150 °C

Two DSC measurements in aluminium crucibles with a hole showed an endothermal effect after the melting in the temperature range of 145 - 235 °C. The melting temperature of 119 - 123 °C is known from the safety data sheet. No further endothermic effects were observed up to the final temperature (500 °C) but exothermic effects occurred above 300 °C. The mass loss amounted to 50% after the first DSC measurement and 14% after the second measurement. The second measurement was terminated at 260 °C to ensure that the endothermal efffect is the melting effect.

Table 1: Results of the DSC measurements

Test item / mg	Starting temperature / °C	Final test temperature / °C	Temperature range (endothermal) / °C	Onset (boiling) / °C	Crucible	Observations after the measurement
10.22	25	500	150 - 235	-	Aluminium with a hole	Black solid, 50% mass loss
9.58	25	260	145 - 235	-	Aluminium with a hole	Dark red, solidified melt, 14% mass loss

The test item had no boiling point at atmospheric pressure. Decomposition started above the melting point at approximately 150 °C.

Conclusions:

The test item had no boiling point at atmospheric pressure. Decomposition started above the melting point at approximately 150 °C.

Executive summary:

The boiling point / boiling range of the test item was investigated by DSC measurement according to OECD 103. The study showed that the test item starts to decompose at a temperature of approx. 150 °C. No boiling point could be determined before the decomposition. The test item has no boiling point under atmospheric conditions.

Description of key information

The boiling point / boiling range of the test item was investigated by DSC measurement according to OECD 103. The study showed that the test item starts to decompose at a temperature of approx. 150 °C. No boiling point could be determined before the decomposition. The test item 4,4’-Dimethoxytrityl chloride has no boiling point under atmospheric conditions.