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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:
15 July to 15 August 2010
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP-compliant, guideline study
Qualifier:
according to guideline
Guideline:
other: ASTM E537-86
Deviations:
no
Qualifier:
equivalent or similar to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
not applicable
GLP compliance:
yes (incl. QA statement)
Type of method:
other: differential scanning calorimetry
Melting / freezing pt.:
< -20 °C
Atm. press.:
1 013.25 hPa
Remarks on result:
other: Standard pressure assumed

After 27½ hours storage in a freezer, the test substance was observed to be a very viscous liquid on removal to -22°C. This indicates that di-tert-nonyl polysulfide had not frozen.

Conclusions:
The melting/freezing point of di-tert-nonyl polysulfide is less than -20°C.
Executive summary:

Fox (2010) is a GLP-compliant, differential scanning calorimetry melting/freezing point study following ASTM guideline E537 -86. The study is considered reliable and suitable for use for this endpoint.

Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
March 30 2006 to April 12 2006
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP-compliant, guideline study
Reason / purpose for cross-reference:
reference to same study
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
Principles of method if other than guideline:
The probe of a thermocouple was placed in a test tube containing the test item. The test item was stirred as it was cooled until the item solidified. Visual observation was used to determine the physical state and the temperature/time curve was recorded.
GLP compliance:
yes (incl. QA statement)
Type of method:
method to determine freezing temperature
Melting / freezing pt.:
-64.7 °C
Atm. press.:
99.8 kPa
Conclusions:
The freezing/melting point of polysulfide di-tert-nonyl is -64.7˚C at 99.8 kPa.
Executive summary:

Weissenfeld (2006) is a GLP, guideline study. It is considered reliable and suitable for use for this endpoint.

Description of key information

The freezing/melting  point of polysulfide di-tert-nonyl is -64.7˚C at 99.8 kPa.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
-64.7 °C

Additional information

The key result is from Weissenfeld (2006) which is a GLP, guideline study. It is considered reliable and suitable for use for this endpoint.