4,4'-Isopropylidenediphenol, polymer with 1-chloro-2,3-epoxypropane, propane-1,2-diol acrylate and succinic anhydride

Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

06 May, 2004

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling point/boiling range)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.2 (Boiling Temperature)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

differential scanning calorimetry

Key result

Decomposition:

yes

Decomp. temp.:

> 200 °C

Remarks on result:

other: Boiling of the test substance was not observed below the temperature at which reaction or decomposition started.

Both the test substance and an inert reference were heated in a DSC. The difference between the heat flow to the sample and the heat flow to the reference was recorded. Three experiments were performed. Two experiments were performed starting from 25°C and one experiment was performed starting from -40°C (two runs).

Experiment 1: At about 114°C a very small effect was observed. An exothermic effect was observed above 200°C. This effect is probably caused by reaction or decomposition of the test substance. After the experiment the test substance, which originally was reddish, highly viscous liquid, appeared to have hardened (glassy). The colour had changed to yellow. The change of the colour of the sample is an indication that the test substance had reacted or decomposed. The test substance had lost 1% of its mass.

Experiment 2: A very small effect was observed at about 88°C. A similar effect was observed during the first experiment (at 114°C). Because it is obvious that melting or boiling did not cause this effect, interpretation of the very small effect is outside the scope of this study. An exothermic effect was observed between 200°C and about 345°C. This effect is probably caused by reaction or decomposition of test substance. Above 345°C an endothermic effect was observed, but at these temperatures the test substance had already reacted or decomposed. After the experiment the sample had a dark brown colour. The change of the colour indicates that the test substance had reacted or decomposed. The test substance had lost 33% of its mass.

Experiment 3: During the first run a shift of base line level (into the endothermic direction), in combination with a small endothermic peak, was observed between -22°C and -2°C. During the second run the same effect was observed between -21°C and -2°C. These effects indicate a glass transition (i.e. a transition of a glassy state to supercooled liquid state). The glass transition temperature of the test substance is evaluated as the midpoint (i.e. the temperature at which the curve value is exactly in the middle between the two extrapolated base lines): for the first and the second run -14°C and -13°C, respectively. After the experiment, the consistency of the sample was unchanged and no change of the mass was observed.

Conclusions:

Under the conditions of the study, boiling of the substance was not observed below the temperature at which reaction or decomposition started.

Executive summary:

A study was conducted to evaluate the boiling point of the test substance using the differential scanning calorimeter (DSC) method according to OECD Guideline 103 and EU Method A.2, in compliance with GLP. Both the test substance and an inert reference were heated in a DSC. The difference between the heat flow to the sample and the heat flow to the reference was recorded. Three experiments were performed. Two experiments were performed starting from 25°C and one experiment was performed starting from -40°C (two runs). The results of all experiments were combined for the conclusion. Reaction or decomposition of the test substance was observed above 200°C (473 K). Under the conditions of the study, boiling of the test substance was not observed below the temperature at which reaction or decomposition started (Van der Bann-Treuer, 2004).

Description of key information

The boiling point was determined using the differential scanning calorimeter (DSC) method according to OECD Guideline 103 and EU Method A.2 (Van der Baan-Treuer 2004).

Additional information

The test substance degraded before boiling/evaporation, above 200°C (473 K).