Registration Dossier

Administrative data

Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
25 Feb - 07 Mar 2014
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2014
Report Date:
2014

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to
Guideline:
EU Method A.2 (Boiling Temperature)
Version / remarks:
May 31, 2008
Deviations:
no
Qualifier:
according to
Guideline:
OECD Guideline 103 (Boiling Point)
Version / remarks:
Jul 27, 1995
Deviations:
no
Qualifier:
according to
Guideline:
EPA OPPTS 830.7220 (Boiling Point / Boiling Range)
Version / remarks:
August 1996
Deviations:
no
GLP compliance:
yes
Type of method:
differential scanning calorimetry

Test material

Reference
Name:
Unnamed
Type:
Constituent

Results and discussion

Boiling point
Atm. press.:
ca. 1 013 hPa
Decomposition:
yes
Decomp. temp.:
> 325 °C
Remarks on result:
other: Boiling of the test substance was not observed below the temperature at which reaction and/or decomposition started.
Remarks:
The pressure was not measured/reported. Atmospheric pressure (ca. 1013 hPa) can be assumed as the sample container was perforated.

Any other information on results incl. tables

Preliminary test

From 300 °C upwards the weight of the sample decreased significantly. At 374 °C the sample weight had decreased by 25 %.

After the experiment, a charred residue remained in the sample container (original colour: beige). The change of the colour indicated reaction and/or decomposition of the test substance.

Main study

In the DSC-curve obtained with Experiment 1 two endothermic peaks between 75 °C and 125 °C were observed. The extrapolated onset temperature of the first peak was 88.29 °C. The effects were possibly obtained due to melting of the test substance combined with reaction / decomposition. Starting at 325 °C the DSC curve showed a strong exothermic peak. The effect was most likely obtained due to reaction and/or decomposition of the test substance. After the experiment, a charred residue remained in the sample container.

To investigate the melting peak a repeated heating cycle was applied in the second experiment. With the first heating the extrapolated onset temperature of the melting peak was 88.25 °C. During cooling and second heating no effects were found. From 325 °C onward, the strong exothermic effect was observed at similar temperatures as Experiment 1. After the experiment, a charred residue remained in the sample container.

Experiment 3 was performed to visually investigate the melting peak. The temperature program was stopped directly after melting. The extrapolated onset temperature of the peak was 88.90 °C. After the experiment, a yellowish to orange molten residue remained in the sample container. The results demonstrated that the test substance has a melting point at 88 °C. The slightly change of the colour indicated reaction and/or decomposition of the test substance.

Conclusion

Reaction and/or decomposition of the test substance was observed at temperatures of > 325 °C (> 598 K). Boiling of the test substance was not observed below the temperature at which reaction and/or decomposition started. Based on this, the test substance has no boiling temperature.

Applicant's summary and conclusion

Conclusions:
The substance decomposes before boiling, starting at a temperature > 325 °C.