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Physical & Chemical properties

Boiling point

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Reference
Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
From 19 December 2018 to 22 February 2019
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 103 (Boiling Point)
Deviations:
not specified
GLP compliance:
no
Remarks:
The study was conducted in a facility which operates in accordance with Good Laboratory Practice principles; however no claim of GLP compliance was intended nor is made for this study
Type of method:
differential scanning calorimetry
Key result
Atm. press.:
ca. 100 kPa
Decomposition:
yes
Decomp. temp.:
>= 280 °C
Remarks on result:
other: decomposition before boiling

Results

For the thermograms and thermographic data for Determinations 1 and 2, kindly refer the attached background material section of the IUCLID.

Thermographic Data

Thermal Event

Interpretation

Temperature (°C)

Determination 1

Determination 2

Exotherm

Onset of decomposition

279.55

281.00

Atmospheric pressure:  100 kPa

After heating to 400 °C, the samples had lost approximately 88% and 81% of their original weight for Determinations 1 and 2 respectively.

Boiling temperature: decomposition from approximately 280 °C (553 K)

Discussion

The test substance softened gradually over a broad temperature range with apparently 3 or 4 observable phases in the thermograms. This may have been due to not only the test substance being a mixture of components, but also components having different organic functional groups. Therefore, each component or group of components could have their own melting temperature resulting in the test substance not completely melting until 121 °C. This effect resulted in the test substance gradually softening rather than a sudden complete melt over a short temperature range. As a result of the low rate of enthalpy change during decomposition, the onset temperature could only be approximated.

Conclusion

The test substance has been determined to decompose from approximately 280 °C (553 K) at 100 kPa. As the test substance decomposed, no value for boiling temperature could be determined.

Conclusions:
Under the study conditions, the test substance has been determined to decompose from approximately 280°C at 100 kPa. As the test substance decomposed, no value for boiling temperature could be determined.

Executive summary:

A study was conducted to determine the boiling point of test substance using the differential scanning calorimetry method, according to OECD Guideline 103. Under the study conditions, the test substance has been determined to decompose from approximately 280°C at 100 kPa. As the test substance decomposed, no value for boiling temperature could be determined (Envigo, 2019).

Description of key information

The boiling point of the test substance was determined using the differential scanning calorimetry method, according to OECD Guideline 103 (Envigo, 2019).

Key value for chemical safety assessment

Additional information

Decomposes at 280°C before boiling