Butanedioic acid, sulfo-, 1-C12-18-alkyl esters, disodium salts

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:

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.

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.