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Boiling point

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Reference
Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
10-11-2011
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study without detailed documentation
Qualifier:
according to guideline
Guideline:
EU Method A.2 (Boiling Temperature)
GLP compliance:
no
Type of method:
distillation method
Key result
Boiling pt.:
ca. 314 °C
Atm. press.:
ca. 760 mm Hg
Decomposition:
yes
Decomp. temp.:
ca. 235 °C
Remarks on result:
other: Since the substance started decomposing at 235°C, a theoretic boiling point is derived by extrapolation of test results at reduced pressure

Boiling temperature at reduced pressure:

This indicated that the boiling  point  of BBSA was:

190.5 °C at 5.00 mm Hg

205.6 °C at 9.62 mmHg

231.2 at 19.57 mm Hg

 

Extrapolation:

The theoretic boiling point (decomposition) of N-n-buthylbenzenesulphonamide at 760 mmHg was 314 °C as obtained by extrapolation.

Conclusions:
The theoretical boiling point of the substance is 314°C at 760mmHg
Executive summary:

The boiling  temperature was determined according to EU Method A.2. The boiling temperature of the substance was measured at reduced pressure owing to the thermal decomposition of the substance at 235°C.The boiling point was determined at respectively 5,0 , 9.6 , and 19.47 mmHg

Extrapolation to atmospheric pressure provides the theoretic boiling temperature of the substance.

 

The theoretical boiling temperature of the substance is 314°C at 760 mm Hg.

Description of key information

Boiling point of the substance is 314°C at 760 mmHg.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
314 °C

Additional information

The boiling point of BBSA was measured in 2011 in the standard EU Method A.2. The boiling point is 314°C at 760 mmHg. In a supporting study that is older, the boiling point was 243°C.

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