Exo-1,7,7-trimethylbicyclo[2.2.1]hept-2-yl methacrylate

Melting point / freezing point

Link to relevant study record(s)

Reference

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

07.12.2006-08.01.2007

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Remarks:

non-GLP. Study performed and documented equivalent to GLP standards. Study according to relevant guideline.

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Deviations:

no

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Version / remarks:

adopted by the Council on 27th July 1995

Deviations:

no

Principles of method if other than guideline:

Method: Differential Scanning Calorimetry In a measurement with differential scanning calorimetry (DSC) a sample of the test item and a
reference material (identical crucible without the test item) are subjected to the same controlled
temperature program. The difference in the temperatures of the test item and the reference
material is the original measurement signal which is internally assigned to the heat flow rate. The
heat flux DSC belongs to the class of heat-exchanging calorimeters. A defined exchange of the
heat to be measured takes place via a thermal resistance. In contrast in the power compensation
DSC, the heat to be measured is compensated with electric energy, by increasing or decreasing
an adjustable heating power.
When the sample undergoes a transition involving a change in enthalpy, for example an
endothermic melting or boiling transition that change is indicated by a departure from the base line
of the heat flow record. The peak area is proportional to the change in enthalpy.

GLP compliance:

no

Remarks:

Study performed and documented equivalent to GLP standards.

Type of method:

differential scanning calorimetry

Key result

Melting / freezing pt.:

-94 °C

Atm. press.:

1 013 hPa

Remarks on result:

other: glass transition temperature; The model predicted melting point is not a relaistic value as IBOMA would be solid at room temperature, which it is not.

The DSC-curve shows no melting peak in the heating cycle, but a relaxation peak and an endothermic Cp-step at - 94 °C. This thermodynamic behavior is characteristic for glass transition, that means the test item solidifies amorphously in the glassy state.

Conclusions:

The melting temperature of the test item was determined by differential scanning calorimetry according to EEC-Directive 92/69 EEC, Part A, Methods for the determination of physico-chemical properties, A. 1 ,,Melting temperature"", EEC Publication No. L383, December 1992.
No melting point was detected but a glass transition temperature at - 94°C. The model predicted melting point is not a realistic value as IBOMA would be solid at room temperature, which it is not.

Executive summary:

The melting temperature of the test item was determined by differential scanning calorimetry according to EEC-Directive 92/69 EEC, Part A, Methods for the determination of physico-chemical properties, A. 1 ,,Melting temperature"", EEC Publication No. L383, December 1992.

No melting point was detected but a glass transition temperature at - 94°C.

NOTE: Any of data in this dataset are disseminated by the European Union on a right-to-know basis and this is not a publication in the same sense as a book or an article in a journal. The right of ownership in any part of this information is reserved by the data owner(s). The use of this information for any other, e.g. commercial purpose is strictly reserved to the data owners and those persons or legal entities having paid the respective access fee for the intended purpose.

Description of key information

No exact melting point was detected but a glass transition temperature at -94°C.

The EPI Suite calculation predicted melting point is not a realistic value as IBOMA would be solid at room temperature, which it is not.

For saftey assessment a melting point < - 20 °C is predicted.

Additional information

The melting temperature of Isobornyl methacrylate was determined by differential scanning calorimetry according to EEC-Directive 92/69 EEC, Part A, Methods for the determination of physico-chemical properties, A. 1 ,,Melting temperature"", EEC Publication No. L383, December 1992.

No melting point was detected but a glass transition temperature at - 94°C.

The model predicted melting point is not a realistic value as IBOMA would be solid at room temperature, which it is not.