Polysulfides, di-tert-nonyl

Boiling point

Link to relevant study record(s)

Reference

Reference 1

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.

Reference 2

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.