2,4,6-triisopropyl-m-phenylene diisocyanate

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:

08 Aug 2012 - 27 Sep 2012

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

differential scanning calorimetry

Remarks on result:

not determinable

Remarks:

there is a glas transition at 56 °C

The test item is a clear colourless fluid at room temperature.

To determine the melting behaviour (three independent single measurements), the test item was measured by DSC between -90 °C and 50 °C with a heating / cooling rate of ±10 K/min in 2 cycles. For the measurement a capsulated crucible, typical for melting point measurements of fluid samples, was used. The test item shows no melting of crystalline subcomponents in the 1st and 2nd heating run up to 50 °C (at ambient temperature the sample is a fluid) according to the definition in the EEC-directive 92/69/EEC, method A.1. The cooling run shows no crystallization. The test item shows a glass transition temperature (amorphous components) at -56 °C in the 1st heating run (from triple determination).

-56 °C (from first measurement)

-56 °C (from second measurement)

-56 °C (from third measurement)

Conclusions:

No melting of crystalline subcomponents has been observed between -90 °C and 50 °C. Glass transition temperature (amorphous components) in the 1st heating run at -56 °C.

Executive summary:

The melting temperature of the test item was determined in accordance with the test method A.1. "Melting/Freezing Temperature" as described in the Official Journal of the European Communities L383A.

The test item shows no melting of crystalline subcomponents in the 1st heating run between -90 °C and 50 °C (at ambient temperature the sample is a fluid) according to the definition in the EEC-directive 92/69/EEC, method A.1. The cooling run shows no crystallisation. The test item shows a glass transition temperature (amorphous components) in the 1st heating run at -56 °C.

Description of key information

The melting temperature of the test item was determined in accordance with the test method A.1. "Melting/Freezing Temperature" as described in the Official Journal of the European Communities L383A.

The test item shows no melting of crystalline subcomponents in the 1st heating run between -90 °C and 50 °C (at ambient temperature the sample is a fluid) according to the definition in the EEC-directive 92/69/EEC, method A.1. The cooling run shows no crystallisation. The test item shows a glass transition temperature (amorphous components) in the 1st heating run at -56 °C.