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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:
2003
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Study according to international guideline (OECD guideline 102) under GLP.
Reason / purpose for cross-reference:
reference to same study
Qualifier:
according to guideline
Guideline:
other: OECD guideline 102 : melting point
Deviations:
no
Qualifier:
according to guideline
Guideline:
EPA OPPTS 830.7220 (Boiling Point / Boiling Range)
Deviations:
no
Principles of method if other than guideline:
Not relevant
GLP compliance:
yes
Type of method:
other: capilairies in metal heating block. similar to Siwoloboff
Boiling pt.:
> 400 °C
Atm. press.:
762 mm Hg
Decomposition:
yes
Remarks on result:
other: According to both OECD 102 and OPPTS 830.7220 methodology

The caffeine reference standard had a reported melting point of 237 °C. The calibration confirmation test resulted in a measured melting point of 237.0 °C. The result was considered acceptable.

The benzophenone and anthraquinone reference standards had reported melting ranges of 49 to 51 °C and 284 to 286 °C, respectively. Routine tests were conducted with both reference standards on the day of the definitive test with Phosflex 61B. The test using benzophenone resulted in a measured melting range of 49.1 to 49.8 °C. The test using anthraquinone resulted in a measured melting range of 284.5 to 285.6 °C. The results for both reference standards were within the reported ranges, and the performance of the melting point instrument was considered acceptable.

The first boiling point/range approximation test resulted in a measured boiling point of >400°C. The second approximation test also resulted in a measured range of >400 °C. These results were used to determine the range of temperatures used in the definitive test.

A steady stream of bubbles was not observed emerging from the boiling point capillaries at temperatures up to 400 °C. All three subsamples of the test substance turned dark amber upon reaching the end of the run. The maximum operating temperature of the melting point instrument was 400 °C; therefore, the mean boiling point was determined to be >400 °C (>673 °K).

Conclusions:
The boiling point of Phosflex 61B is > 400 degrees Celsius.
Executive summary:

The boiling point of Phosflex 61B was determined using a Büchi metlingpoint device according to OECD Guideline 102 and EPA OPPTS 820.7220 under GLP. The boiling point at 762 mm Hg was found to be > 400 degrees Celsius: samples turned dark amber .

Description of key information

The boiling point was determined to be >400 degrees Celsius at 762 mm Hg.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
400 °C

Additional information

The boiling point of Phosflex 61B was determined using a Büchi melting point device according to OECD Guideline 102 and EPA OPPTS 820.7220 under GLP. The boiling point at 762 mm Hg was found to be > 400 degrees Celsius: samples turned dark amber.