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Melting point / freezing point

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Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2013
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
GLP compliance:
no
Type of method:
thermal analysis
Remarks:
DSC
Atm. press.:
ca. 1 atm
Decomposition:
yes
Decomp. temp.:
ca. 267 °C
Remarks on result:
other: a second exotemric peak is observed at the onset T = 307.6°C

Between 25 -190°C water evaporation occurs, followed by substance decomposition between 239 -304°C. The decomposition onset is 267.2°C with an enthalpy energy equal to 299.9 J/g.

A second exotermic event occurs between 304 -370°C with an onset T at 307.6°C and enthalpy energy equal to 81.1 J/g.

Conclusions:
The decomposition of the substance was observed with onset temperature equal to 267.2°C.
A second exotermic events occurs at an onset temperature equal to 307.6°C.
Executive summary:

The substance melting point was tested by thermoanalysis (DSC) according to OECD 102.

Between 25 -190°C water evaporation occurs, followed by substance decomposition between 239 -304°C. The decomposition onset is 267.2°C with an enthalpy energy equal to 299.9 J/g.

A second exotermic event occurs between 304 -370°C with an onset T at 307.6°C and enthalpy energy equal to 81.1 J/g.

Description of key information

T decomposition= 267.2°C

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
267.2 °C

Additional information

The melting point of the substance was tested by thermoanalysis (DSC) according to OECD 102 (REACH&Colours Kft, 2013). The decomposition onset was found to be 267.2°C with an enthalpy energy equal to 299.9 J/g.

A second exotermic event occurs between 304 -370°C with an onset T at 307.6°C and enthalpy energy equal to 81.1 J/g.

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