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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:
16-Feb-2010 to 13-Apr-2010
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Study conducted in compliance with agreed protocols, with no or minor deviations from standard test guidelines and/or minor methodological deficiencies, which do not affect the quality of the relevant results.
Qualifier:
according to
Guideline:
EU Method A.2 (Boiling Temperature)
Deviations:
no
Qualifier:
according to
Guideline:
OECD Guideline 103 (Boiling point/boiling range)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Remarks:
Date of Signature on GLP certificate: November 12, 2008
Type of method:
differential scanning calorimetry
Remarks:
additionally used method: capillary test
Key result
Atm. press.:
98 kPa
Decomposition:
ambiguous
Remarks:
Development of a gas starting at about 268 °C
Remarks on result:
other: see remarks
Remarks:
A capillary test showed the development of a gas starting at about 268 °C but it was impossible to decide, whether this was the result of boiling or decomposition of the test item. As the test item changes its color during heating and the DSC-curve shows only exothermic peaks, decomposition seems to be more likely.

  Preliminary Test

The DSC-curve of the preliminary test (heating rate of 20 °C/min from 25 °C to 400 °C) is shown inFigure 1. Two exothermic heat effects were observed, the first peak starting at about 177 °C, a second exothermic reaction starting at about 326 °C. After the experiment, the sample had lost about 94% of its mass and the sample was a brownish black melt.

 

 

 Main Tests

Differential Scanning Calorimeter

For further investigation of the heat effects obtained during the preliminary test, a DSC test was recorded in the immediate vicinity of the first peak. The sample was heated from 130 °C to 310 °C with the heating rate adjusted to 10 °C. The exothermic reaction started at about 133 °C and is possibly the result of the decomposition of the sample. After this experiment, the sample lost about 27% of its mass and was colored slightly yellowish.

 

Capillary Test

For further interpretation of the exothermic heat effect at 133 °C, a capillary test was carried out in the temperature range between 100 °C and 310 °C (heating rate 10 °C/min). At about 225 °C some bubbles could be observed. Around 246 °C more bubbles rose up. At about 268 °C a current stream of bubbles were observed. During this test, the test item changed its color to yellow. It remains unclear, whether the development of the bubbles is a result of decomposition of the test item or the result of boiling superposed by a second effect, which is responsible for the exothermic peak as shown in the DSC-curve.

Conclusions:
No boiling point of Oxirane, mono[(C12-14-alkyloxy)methyl] derivs. / ERC Nr 17 could be determined using DSC. A capillary test showed the development of a gas starting at about 268 °C but it was impossible to decide, whether this was the result of boiling or decomposition of the test item. As the test item changes its color during heating and the DSC-curve shows only exothermic peaks, decomposition seems to be more likely.
Executive summary:

No boiling point of Oxirane, mono[(C12-14-alkyloxy)methyl] derivs. / ERC Nr 17 could be determined using DSC. A capillary test showed the development of a gas starting at about 268 °C but it was impossible to decide, whether this was the result of boiling or decomposition of the test item. As the test item changes its color during heating and the DSC-curve shows only exothermic peaks, decomposition seems to be more likely.

 

The atmospheric pressure during the measurements was 98.0 kPa.

Description of key information

The determination of the boiling point 1boiling range of the test item was performed accordingto the EEC Directive 92/69 and Council Regulation (EC) No. 440/2008, A.2 "Boiling temperature" and to the OECD Guideline No. 103: "Boiling point", adopted July 27, 1995.
No boiling point of Oxirane, mono[(C12-14-alkyloxy)methyl] derivs. / ERC Nr 17 could be determined using DSC. A capillary test showed the development of a gas starting at about 268°C but it was impossible to decide, whether this was the result of boiling or decomposition of the test item. As the test item changes its color during heating and the DSC-curve shows only exothermic peaks, decomposition seems to be more likely.

Key value for chemical safety assessment

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