1,1'-(4-methyl-1,3-phenylene)bis-1H-pyrrole-2,5-dione

Melting point / freezing point

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

data from handbook or collection of data

Qualifier:

no guideline available

Principles of method if other than guideline:

no further information available

GLP compliance:

no

Remarks:

conduct of study prior to implementation of GLP

Type of method:

other: no information available

Key result

Melting / freezing pt.:

>= 174 - <= 176 °C

Remarks on result:

other: no further information available

Conclusions:

According to the available data the melting point range was measured at 174-176 °C.

Reference 2

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

supporting study

Study period:

2015-12-08 to 2016-03-07

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

guideline study with acceptable restrictions

Reason / purpose for cross-reference:

reference to other study

Qualifier:

according to guideline

Guideline:

other: OECD Guideline 113 (Screening Test for Thermal Stability and Stability in Air)

Version / remarks:

adopted 12 May, 1981

Deviations:

no

Qualifier:

according to guideline

Guideline:

other: UN recommendations on the transport of dangerous goods: Manual of Tests and Criteria, Rev. 5 (2009) and UN-Model-Regulations, Rev. 19 (2015)

Version / remarks:

2015

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

differential scanning calorimetry

Melting / freezing pt.:

>= 160 - <= 190 °C

Atm. press.:

1 013 hPa

Decomposition:

yes

Decomp. temp.:

>= 210 - ca. 500 °C

Sublimation:

no

In the DSC-measurements the test item 2,4-Bismaleimidotoluene showed an endothermic effect in the temperature range of 160-190 °C. An exothermic effect could be observed in the temperature range of 210 - 310 °C with an energy of approximately -180 J/g. A second exothermal effect occurred in the temperature range of 470 to >500 °C with a decomposition energy greater -230 J/g.

Conclusions:

Based on the results of the performed test and on the information of OECD guideline 113, within a DSC measurement an endothermic peak is regarded as melting point of the substance whereas an exothermic peak is regarded as decomposition of the substance. Thus, the substance is considered to melt in a range between 160-190 °C under the conditions of the test.

Description of key information

- Handbook data/collection of data, melting point: 174 -176°C at 1013 hPa.

- study conducted according to OECD guideline 113 (adopted 12 May 1981), differential scanning calorimetry, endothermic peak at 160 -190 °C.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:

175 °C

Additional information

According to the available handbook data the melting point range was measured at 174-176 °C. The results from a test conducted according to OECD guideline 113, detecting an endothermic peak in a differential scanning calorimerty (DSC) at 160 -190°C, confirm the handbook data.