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Boiling point

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Reference
Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 103 (Boiling Point)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.2 (Boiling Temperature)
Deviations:
no
GLP compliance:
no
Type of method:
differential scanning calorimetry
Specific details on test material used for the study:
Identification: 1-Phenyl-3-methyl-4-(p-dodecylphenylazo)-5-pyrazolone
Appearance/Physical state: dark red semi solid
Batch: ZA07202016
Purity: >99%
Expiry date: 19 July 2019
Storage conditions: room temperature in the dark
Key result
Atm. press.:
99.6 kPa
Decomposition:
yes
Decomp. temp.:
200 °C
Remarks on result:
other: The test item has been determined to decompose from approximately 200 °C (473 K).

The thermographic data for Determinations 1 and 2 are shown in the following table:

Thermographic Data:

Thermal Event

Interpretation

Approximate Temperature (°C)

Determination 1

Determination 2

exotherm

decomposition

200

200

Atmospheric pressure             :          99.6 kPa

After heating, the samples had lost approximately 55% and 52% of their original weight for Determinations 1 and 2 respectively.

Result:            decomposition from approximately 200 °C (473 K).

Discussion:

Due to the low enthalpy change at the onset of decomposition the temperature can only be approximated. The decomposition temperature has been reported as approximately that of the first rise in the baseline

Conclusions:
The test item has been determined to decompose from approximately 200 °C (473 K).
Executive summary:

Boiling Point. Decomposed from approximately 200 °C (473 K) at 99.6 kPa by differential scanning calorimetry, designed to be compatible with Method A.2 Boiling Temperature of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 103 of the OECD Guidelines for Testing of Chemicals, 27 July 1995.

Description of key information

Boiling Point. Decomposed from approximately 200 °C (473 K) at 99.6 kPa by differential scanning calorimetry, designed to be compatible with Method A.2 Boiling Temperature of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 103 of the OECD Guidelines for Testing of Chemicals, 27 July 1995.

Key value for chemical safety assessment

Additional information

The test item decomposed from approximately 200 °C (473 K) at 99.6 kPa.