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Physical & Chemical properties

Melting point / freezing point

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Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
supporting study
Study period:
2010-08-17
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Well described GLP compliant study conducted to recognized international test guidelines
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
GLP compliance:
yes
Type of method:
pour point
Melting / freezing pt.:
30 °C
Remarks on result:
other: +/- 1C
Conclusions:
Pour point (melting/freezing point) is 30 +/- 1C
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
supporting study
Study period:
2010-08-19
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Well described GLP compliant study conducted to recognized international test guidelines
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
GLP compliance:
yes
Type of method:
pour point
Melting / freezing pt.:
-2 °C
Remarks on result:
other: +/- 1C
Conclusions:
Pour point (melting/freezing point) is -2 +/- 1C
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2010-08-17
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Well described GLP compliant study conducted to recognized international test guidelines
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
GLP compliance:
yes
Type of method:
pour point
Melting / freezing pt.:
-23 °C
Remarks on result:
other: +/- 1C
Conclusions:
Pour point (melting/freezing point) is -23 +/- 1C
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
supporting study
Study period:
2010-08-19
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Well described GLP compliant study conducted to recognized international test guidelines
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
GLP compliance:
yes
Type of method:
pour point
Melting / freezing pt.:
12 °C
Remarks on result:
other: +/- 1C
Conclusions:
Pour point (melting/freezing point) is 12 +/- 1C
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
supporting study
Study period:
2010-08-19
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Well described GLP compliant study conducted to recognized international test guidelines
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
GLP compliance:
yes
Type of method:
pour point
Melting / freezing pt.:
28 °C
Remarks on result:
other: +/- 1C
Conclusions:
Pour point (melting/freezing point) is 28 +/- 1C

Description of key information

The melting/freezing points for the 5 aromatic sulphonic acids were all 30°C or below; the range was -23 to 30°C.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
4 °C

Additional information

A medium value for Chemical Safety Assessment has been choosen, representing the real impact of those substances in environmental conditions. They are indeed very hygroscopic, then deliquescents even below their melting point. The consequence is that most of them at 25°C are in fact liquid