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Boiling point

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Endpoint:
boiling 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:
yes
Qualifier:
equivalent or similar to guideline
Guideline:
EU Method A.2 (Boiling Temperature)
Deviations:
not applicable
Principles of method if other than guideline:
The study was taken to 450°C rather than 400°C but as the temperature range required was still covered, this was not considered to have impacted on the study.
GLP compliance:
yes (incl. QA statement)
Type of method:
differential scanning calorimetry
Atm. press.:
100.33 kPa
Decomposition:
yes
Decomp. temp.:
175 °C

Thermal decomposition but not oxidative decomposition was observed under both air and nitrogen atmospheres.

An aliquot was heated on a heating mantle in a silicone oil blanket and showed a gradual colour change from dark yellow at 171°C, through dark orange to deep red at 215°C at which point heating was stopped. The test item was observed to decompose and the as the volume reduced, it was indicated that soon after production, the decomposition products boiled. Boiling and decomposition were also indicated through a black film of residue in the crucibles.

Conclusions:
Di-tert-nonyl polysulfide decomposes with the decomposition products boiling from approximately 175°C at 100.33 kPa.
Executive summary:

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

Endpoint:
boiling 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 103 (Boiling point/boiling range)
Deviations:
no
Principles of method if other than guideline:
Two identical aluminium containers, one filled with test item, were heated at a constant rate on a calorimeter. The difference in heat flow between the two containers was recorded.
GLP compliance:
yes
Type of method:
differential scanning calorimetry
Boiling pt.:
208.3 - 263.8 °C
Atm. press.:
99.8 kPa
Conclusions:
The boiling range of polysulfide di-tert-nonyl is 208.3 to 263.8˚C at 99.8 kPa.
Executive summary:

Weissenfeld (2006) is a GLP, guideline study following OECD guideline 103. It is considered reliable and suitable for use for this endpoint.

Description of key information

The boiling range of polysulfide di-tert-nonyl is 208.3 to 263.8˚C at 99.8 kPa.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
236 °C

Additional information

The boiling point range for di-tert-nonyl polysulfide was determined to be 208.3 -263.8˚C at 99.8 kPa. This key result is from Weissenfeld (2006) is a GLP, guideline study following OECD guideline 103. It is considered reliable and suitable for use for this endpoint.