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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:
OECD Guideline 103 (Boiling point/boiling range)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.2 (Boiling Temperature)
Deviations:
no
GLP compliance:
no
Type of method:
photocell detection
Boiling pt.:
199.5 °C
Atm. press.:
1 013 hPa
Decomposition:
no

Two individual measurements were made, yielding boiling points of 199.4 and 166.6 °C. The average boiling point was 199.5 °C.

Conclusions:
The boiling point of the test substance was199.5 °C at standard atmospheric pressure.
Executive summary:

The boiling point of the test substance methyl benzoate was determined in accordance with OECD TG 103 by using photocell detection according to Siwoloboff. The substance was transferred into a test tube and the formation of steam bubbles was induced by immersion of a boiling capillary. The sample was heated at a rate of 0.2 °C per minute in an immersion bath. The ascending bubbles reflect the light of the built-in light source and thus can be separately detected by the photo cell (Mettler Thermo System FP90 with measuring cell FP81). The bubbles escaping before the boiling point has been reached are clearly different from the gas bubbles which escape with continuously increasing frequency at the boiling temperature. The boiling point of the test substance was199.5 °C at standard atmospheric pressure.

Description of key information

199.5 °C, no decomposition

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
199.5 °C

Additional information

The boiling point of the test substance was determined to be 199.5 °C in accordance with OECD TG 103 by using photocell detection. This value is supported by handbook data reporting a boiling point between 198 and 200 °C.