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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Administrative data

boiling point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
18th November-25th November 1997
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: A well described thermal analytical result (TG/DTA and DSC). No details on the test sample, only batch name was given. No GLP study.

Data source

Reference Type:
study report
Report date:

Materials and methods

Test guideline
according to guideline
EU Method A.2 (Boiling Temperature)
Principles of method if other than guideline:
No guideline is mentioned in the report but the study is very well described and performed according to EC A.2 test guideline.
GLP compliance:
Type of method:
differential scanning calorimetry
thermal analysis

Test material

Constituent 1
Reference substance name:
Details on test material:
Crystal form. No further details on the test material were given in the document.

Results and discussion

Boiling point
Decomp. temp.:
>= 224 °C
Remarks on result:
other: Decomposition at >= 497 K. No melting or boiling temperature.

Any other information on results incl. tables

TG/DTA results.

Under Oxygen:

Vigorous decomposition (significant exothermic effect)

Ttop: 240.5°C; Tonset: 238.3°C (delta H= -693 uV.s/mg)

Weight loss: 0.05% until 230°C (evaporation of small amount of volatile components) and 36.8% (decomposition)

Results under Nitrogen:

Decomposition (exothermic) but less vigorous than under oxygen.

Ttop: 240.5°C; Tonset: 224.3°C (delta H= -94 uV.s/mg)

Weight loss: 0.24% until 230°C (evaporation) and 42.1% (decomposition)


Differential Scanning Calorimetry (DSC) results:

Sealed cup:

Ttop: 230.1°C, Tonset: 227.7°C. deltaH= -400.2 mJ/mg ; deltaH= -16.1 mJ/mg

Open cup:

Before decomposition, a small transition effect was observed. This might be due to the presence of a minor component (e.g. volatile component). The second (large exothermic) effect is due to decomposition.

From the curve it was concluded that decomposition occurs in several steps. This was not observed in the sealed cup. Probably, some oxygen was in the sealed cup and decomposition reaction in it is more vigorously than in the open cup.

Exothermic decomposition occurs at lower temperatures in sealed containers. The amount of energy released during decomposition is much higher in sealed containers than in open containers.

First transition: Ttop64.6°C (delta H= 14.8 mJ/mg)

Second transition: Tonset: 225.6°C (delta H= -163.7 mJ/mg); Ttop:240.6°C

Applicant's summary and conclusion

Reaction and/or decomposition of the test substance was observed at temperatures of >= 224°C (> 497 K). In an oxygen atmosphere, decomposition is vigorous. 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.