Registration Dossier

Administrative data

Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
3 July 2017 to 18 July 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2017
Report Date:
2017

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to
Guideline:
OECD Guideline 103 (Boiling Point)
Deviations:
not specified
Qualifier:
according to
Guideline:
EU Method A.2 (Boiling Temperature)
Deviations:
not specified
Qualifier:
according to
Guideline:
EPA OPPTS 830.7220 (Boiling Point / Boiling Range)
Deviations:
not specified
GLP compliance:
yes (incl. certificate)
Remarks:
Health Care Inspectorate of the Ministry of Health, Welfare and Sport; Utrecht, The Netherlands
Type of method:
differential scanning calorimetry

Test material

Reference
Name:
Unnamed
Type:
Constituent

Results and discussion

Boiling point
Atm. press.:
1 013.25 hPa
Decomposition:
yes
Remarks:
reaction and/or decomposition at > 275 ºC.
Decomp. temp.:
> 275 °C

Any other information on results incl. tables

Preliminary Test

The TGA curve of the test item started at 400 °C, beyond this temperature the weight of the sample decreased significantly. At 476 °C, the sample weight had decreased by 25%.

After the experiment, a brown molten residue remained in the sample container (original colour: white). The change of the colour indicated reaction and/or decomposition of the test item.

Main Study

An endothermic peak in the DSC curve was observed between 100 °C and 150 °C. The extrapolated onset temperature of the peak was 131.225 °C. The endothermic effect was most likely obtained due to melting of the test item. From 275 °C a small exothermic effect was observed. The effect was probably obtained due to reaction and/or decomposition of the test item.

After the experiment, a light yellow molten residue remained in the sample container (original colour: white). The change of the colour indicated reaction and/or decomposition of the test item. Based on this visual observation, it was found that the test item had molten and the change of the colour demonstrated reaction and/or decomposition of the test item.

In order to investigate the melting peak, Experiment 2 was stopped directly after the melting peak. The extrapolated onset temperature was 133.416°C. After the experiment, a colourless molten residue remained in the sample container. Based on this visual observation, it demonstrated that melting was the reason for the endothermic effect.

Conclusion

The boiling temperature of 4,4'-[isopropylidenebis(4,1-phenyleneoxy)]dianiline were determined by DSC. Reaction and/or decomposition of the test item was observed during DSC experiment at temperatures of > 275 °C (> 548K). Boiling of the test item was not observed below the temperature at which reaction and/or decomposition started. Based on this, the test item has no boiling temperature.

Applicant's summary and conclusion