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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Physical & Chemical properties

Boiling point

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Administrative data

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Reference
Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 103 (Boiling Point)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
differential scanning calorimetry
Key result
Decomposition:
yes
Decomp. temp.:
ca. 165 °C
Remarks on result:
not determinable
Remarks:
No boiling occurred before decomposition started.

No significant endotherms (beyond the melting of the test item at approximately 110 °C) were observed before the sample underwent decomposition without any evidence of boiling, irrespective of the crucible lid type employed. Due to the low initial rate of enthalpy change during decomposition, the onset temperature could only be approximated. Because of the variance observed, a limit value has been reported based on the lowest observed onset temperature. The use of manually pierced crucibles (an open system) also provided an opportunity to assess the stability of the test item in air and in an inert atmosphere (nitrogen). Decomposition was observed both in air and under a nitrogen atmosphere, indicating the process was most likely thermal and not oxidative.

Conclusions:
The substance was determined to decompose from approximately 165 °C at 101.8 kPa, without boiling.
Executive summary:

The boiling temperature of the substance was determined under GLP in accordance with OECD TG 103, using differential scanning calorimetry. The temperature accuracy of the apparatus was checked prior to testing with indium and zinc. Aliquots of about 5 to 6 mg of the test substance were placed in aluminium crucibles with pre-perforated or manually perforated lids. The test substance was then heated at a rate of 20 °C/min, starting at a temperature of 20 °C. Four determinations were performed in air, and two determinations in nitrogen. A thermogram was recorded for each determination. No significant endotherms (beyond the melting of the test item at approximately 110 °C) were observed before the sample underwent decomposition without any evidence of boiling, irrespective of the crucible lid type employed. Due to the low initial rate of enthalpy change during decomposition, the onset temperature could only be approximated. Because of the variance observed, a limit value has been reported based on the lowest observed onset temperature. The use of manually pierced crucibles (an open system) also provided an opportunity to assess the stability of the test item in air and in an inert atmosphere (nitrogen). Decomposition was observed both in air and under a nitrogen atmosphere, indicating the process was most likely thermal and not oxidative.

Description of key information

No boiling observed before decomposition from about 165 °C (GLP, OECD TG 103)

Key value for chemical safety assessment

Additional information