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Melting point / freezing point

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Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2012
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Remarks:
Guideline compliant well documented study
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
GLP compliance:
no
Type of method:
thermal analysis
Key result
Melting / freezing pt.:
>= 249 °C
Decomposition:
yes
Decomp. temp.:
>= 249 °C
Remarks on result:
other: Up to 249 °C the sample shows a weight loss of ca. 7 weight%. From 249 °C the test item shows most probably a thermal decomposition with melting (a melting >300 °C can not be excluded, due to the information of the capillary method)

The test item Sulfosuccinic (FA C12-18)E, 2Na shows no melting of crystalline subcomponents up to 249 °C according to the definition in the OECD Guideline 102 (mean value from repeat determinations; 1st to 4th heating run).

·        248 °C (from first measurement)

·        250 °C (from second measurement)

·        249 °C (from third measurement)

Up to 249 °C the sample shows a weight loss of ca. 7 weight%. From 249 °C the test item shows most probably a thermal decomposition with melting (a melting >300 °C cannot be excluded, due to the information of the capillary method; the decomposition products seem to start melting at temperatures >300 °C) and evaporation of the decomposition components. A vaporization of significant parts of the test item cannot be completely excluded.

Conclusions:
decomposition at >= 249°C
melting point > 249 °C
Executive summary:

In the Klimisch 1 non-GLP study from Kintrup (2012) the melting point of Sulfosuccinic (FA C12-18)E, 2Na was determined with the DSC method according to OECD 102 and EU method A.1. The test item did not show melting up to 249°C. Up to 249 °C the sample shows a weight loss of ca. 7 weight%. From 249 °C the test item shows most probably a thermal decomposition with melting (a melting >300 °C cannot be excluded, due to the information of the capillary method; the decomposition products seem to start melting at temperatures >300 °C) and evaporation of the decomposition components. A vaporization of significant parts of the test item cannot be completely excluded.

 

For the risk assessment a melting point of 249°C will be used.

 

This information is considered to be relevant and reliable for the further risk assessment.

Description of key information

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
249 °C

Additional information

In the Klimisch 1 non-GLP study from Kintrup (2012) the melting point of Sulfosuccinic (FA C12-18)E, 2Na was determined with the DSC method according to OECD 102 and EU method A.1. The test item did not show melting up to 249°C. Up to 249 °C the sample shows a weight loss of ca. 7 weight%. From 249 °C the test item shows most probably a thermal decomposition with melting (a melting >300 °C cannot be excluded, due to the information of the capillary method; the decomposition products seem to start melting at temperatures >300 °C) and evaporation of the decomposition components. A vaporization of significant parts of the test item cannot be completely excluded.

 

For the risk assessment a melting point of 249°C will be used.

 

This information is considered to be relevant and reliable for the further risk assessment.