4,4'-[(isopropylidene)bis(p-phenyleneoxy)]diphthalic dianhydride

Boiling point

Link to relevant study record(s)

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

GLP compliance:

yes

Type of method:

ebulliometer

Key result

Boiling pt.:

> 314 °C

Atm. press.:

ca. 101.3 kPa

Decomposition:

no

- The observed duplicate boiling points of the reference material were 245 and 244 °C for an average of 245 ± 1 °C at 101.3 kPa.  This compared to the reported boiling point of 248 °C at 101.3 kPa, indicating an average deviation/bias of 3 °C. 

- The duplicate test material warming curves did not show a distinct boiling plateau up to the maximum temperature of 311 °C.  This was supported by the fact that test material was not observed to boil during the test.  No test material colour change was observed during the test.  Therefore, the bias-corrected boiling point of the test material was greater than 314 °C at 101.3 kPa.  Boiling point measurement at reduced pressure was not performed because the calculated boiling point at atmospheric pressure was greater than 300 °C, which is the regulatory limit set by the US EPA (EPA, 1999) and Environment Canadian (CEPA, 1993).

Conclusions:

Under the conditions of this study the bias-corrected boiling point of the test material was greater than 314 °C at 101.3 kPa. No colour change was observed during the test.

Description of key information

Under the conditions of this study the bias-corrected boiling point of the test material was greater than 314 °C at 101.3 kPa. No colour change was observed during the test.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:

314 °C

Additional information

The boiling point of the test material was investigated in accordance with the standardised guideline OECD 103 under GLP conditions. The study was awarded a reliability score of 1 in accordance with the criteria set forth by Klimisch et al. (1997).

The observed duplicate boiling points of the reference material were 245 and 244 °C for an average of 245 ± 1 °C at 101.3 kPa.  This compared to the reported boiling point of 248 °C at 101.3 kPa, indicating an average deviation/bias of 3 °C. The duplicate test material warming curves did not show a distinct boiling plateau up to the maximum temperature of 311 °C.

Under the conditions of this study the bias-corrected boiling point of the test material was greater than 314 °C at 101.3 kPa. No colour change was observed during the test.