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Physical & Chemical properties

Melting point / freezing point

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Reference
Endpoint:
melting point/freezing 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:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
GLP compliance:
yes
Type of method:
capillary method
Key result
Melting / freezing pt.:
>= 185 - <= 190 °C
Atm. press.:
ca. 1 013 hPa
Decomposition:
no
Sublimation:
no

The calibration substance, phenanthrene, gave an average melting point of 97 to 99 °C, which, when compared to the expected MP of 99 to 101 °C, indicated a bias of 2 °C.  The MP results for the test material were elevated 2 °C to account for this bias.  The observed bias adjusted average MP of the test material was 185 - 190 °C.  No colour change was observed.

Conclusions:
Under the conditions of this study, the observed bias adjusted average melting point of the test material was 185 to 190 °C.  No colour change was observed.
Executive summary:

The melting point of the test material was investigated in accordance with the standardised guideline OECD 102 under GLP conditions.

The calibration substance, phenanthrene, gave an average melting point of 97 to 99 °C, which, when compared to the expected melting point of 99 to 101 °C, indicated a bias of 2 °C. The results for the test material were elevated 2 °C to account for this bias. 

Under the conditions of this study, the observed bias adjusted average melting point of the test material was 185 to 190 °C.  No colour change was observed.

Description of key information

The melting range was determined to be 185 to 190 °C.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
185 °C

Additional information

The melting range of the test material was determined following the capillary tube method in accordance with OECD 102 under GLP conditions (Vizon SciTec Inc., 2004). The study was awarded a reliability score of 1 in accordance with the criteria set forth by Klimisch et al. (1997).

Under the conditions of this study, the melting range was determined to be 185 to 190 °C; no colour change was observed.