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Boiling point

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Reference
Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.2 (Boiling Temperature)
GLP compliance:
yes (incl. QA statement)
Type of method:
differential scanning calorimetry
Decomposition:
yes
Decomp. temp.:
240 °C
Remarks on result:
other: Exotherm causes an irreversible change of the molecular properties (probably decomposition), a boling point cannot be determined.

An endothermic effect, started at 150 °C was observed. A small exothermic reaction started at 240 °C (enthalpy about 40 J/g) was followed by an endothermic effect at 240 °C. Since the exotherm causes an irreversible change of the molecular properties (probably decomposition), a boiling point (boiling range) in the classical sense cannot be determined. Following the exothermic reaction, boiling effects are observed above 310 °C.

The boiling point of 2,2'-Dithiobis(benzothiazole) is according to EC-A 2 non-determinable.

Conclusions:
The boiling point of 2,2'-Dithiobis(benzothiazole) is non-determinable.
Executive summary:

An endothermic effect, started at 150 °C was observed. A small exothermic reaction started at 240 °C (enthalpy about 40 J/g) was followed by an endothermic effect at 240 °C. Since the exotherm causes an irreversible change of the molecular properties (probably decomposition), a boiling point (boiling range) in the classical sense cannot be determined. Following the exothermic reaction, boiling effects are observed above 310 °C. The boiling point of 2,2'-Dithiobis(benzothiazole) is according to EC-A 2 non-determinable (Currenta, 2010).

Description of key information

An endothermic effect, started at 150 °C was observed. A small exothermic reaction started at 240 °C (enthalpy about 40 J/g) was followed by an endothermic effect at 240 °C. Since the exotherm causes an irreversible change of the molecular properties (probably decomposition), a boiling point (boiling range) in the classical sense cannot be determined. Following the exothermic reaction, boiling effects are observed above 310 °C. The boiling point of 2,2'-Dithiobis(benzothiazole) is according to EC-A 2 non-determinable (Currenta, 2010).

Key value for chemical safety assessment

Additional information