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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:
09 June 2006 to 13 September 2006
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.2 (Boiling Temperature)
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 103 (Boiling point/boiling range)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Remarks:
RCC Ltd., CH-4452 Itingen, Switzerland
Type of method:
differential thermal analysis
Specific details on test material used for the study:
Identity: FAT 40826/A
Batch: TZ 5604 BOP 01/06
Purity: Content of organic part (Na-salt): approx. 78 %
Oligomers: 13 %
Main component: approx. 48 %
Appearance: Solid, orange powder
Expiration date: February 01, 2011
Storage: At room temperature at about 20 °C in a desiccator.
Boiling pt.:
> 400
Remarks on result:
other: Other data not available in the report.

PRELIMINARY TEST


The DSC-curve of the first preliminary test (heating rate of 10 °C/min from 25 °C to 400 °C) showed a broad endothermic heat effect observed between about 66 °C and 194 °C. At about 320 °C an exothermic reaction took place. After the experiment, the sample was still a powder, but turned black and lost about 22 % of its mass. In order to determine the endothermic heat effect more precisely, a further pre-test was performed from 25 °C to 230 °C with a heating rate of 10 °C/min. The endothermic heat effect was observed between 66 °C and 208 °C. As the test item was still an orange powder after the experiment it can be concluded that the heat effect is not due to melting. The heat effect might be due to evaporation of water but further evaluation is beyond the scope of this study. The sample only lost about 4 % of its mass.


 


MAIN TESTS


To confirm the results of the preliminary tests, two further DSC runs were performed. A test item amount of 6.28 mg (for melting point determination) and 6.9 mg (for boiling point determination) were heated up from 25 °C to 400 °C at a rate of 10 °C/min. The same endothermic heat effect as in the pre-tests was observed, followed by an exothermic reaction starting at about 320 °C, which might be due to decomposition of the test item. After the experiment, both samples had lost about 22 % of their mass and the samples were a black colored powder.

Conclusions:
No boiling point of FAT 40826/A was observed under the conditions of the test however thermic decomposition started at about 320 °C
Executive summary:

In a GLP-compliant study performed according to OECD guideline 103 and EC Method A.2, the boiling point of the test substance was determined. No boiling was observed below 400 °C, but an exothermic reaction was observed starting at about 320 °C, which might be due to decomposition of the test substance. After the experiment, the sample became a black powder and lost about 22 % of its mass.

Description of key information

In a GLP-compliant study performed according to OECD guideline 103 and EC Method A.2, the boiling point of the test substance was determined. No boiling was observed below 400 °C, but an exothermic reaction was observed starting at about 320 °C, which might be due to decomposition of the test substance. After the experiment, the sample became a black powder and lost about 22 % of its mass.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
400 °C

Additional information

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