Dibutyl itaconate

Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

02 November 2015 - 17 December 2015

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.2 (Boiling Temperature)

Version / remarks:

2008

Deviations:

no

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling point/boiling range)

Version / remarks:

1995

Deviations:

no

Qualifier:

according to guideline

Guideline:

EPA OPPTS 830.7220 (Boiling Point / Boiling Range)

Version / remarks:

1996

Deviations:

no

GLP compliance:

yes

Type of method:

differential scanning calorimetry

Key result

Boiling pt.:

222 °C

Atm. press.:

>= 1 017 - <= 1 021 hPa

TGA EXPERIMENT

From 200°C upwards the weight of the sample decreased significantly. At 287°C the sample weight had decreased by 25%. After the experiment it was observed that the test item was evaporated from the sample container.

DSC EXPERIMENT 1

A small endothermic peak between -25°C and 0°C was observed. Its origin is unknown. Another endothermic peak was observed between 150°C and 275°C. The extrapolated onset temperature of the peak was 221.54°C. The effect was most likely obtained due to evaporation of the test item. After the experiment it was observed that the test item was evaporated from the sample container.

DSC EXPERIMENT 2

Similar results as with Experiment 1 were obtained. The extrapolated onset of the evaporation peak was 221.49°C. After the experiment it was observed that the test item was evaporated from the sample container.

DSC EXPERIMENT 3

To investigate the evaporation peak hermetic sealed sample container was applied in Experiment 3. The extrapolated onset temperature of the evaporation peak was 282.14°C. As can be seen the endothermic peak shifted to higher temperatures. It demonstrated that evaporation of the test item was the reason for the endothermic effect. After the experiment it was observed that the test item was evaporated from the sample container.

DSC EXPERIMENT 4

An additional experiment was performed in an attempt to determine the melting temperature by DSC. A slower rate of cooling and heating was applied. No effects which can be attributed to melting could be observed. An endothermic peak was observed between 150°C and 275°C. The extrapolated onset temperature of the peak was 199.22°C. The effect was obtained due to evaporation of the test item. After the experiment it was observed that the test item was evaporated from the sample container.

The boiling temperature of the substance was determined as the average boiling temperature obtained from Experiment 1 (221.54°C) and Experiment 2 (221.49°C).

Conclusions:

The boiling temperature of the substance at 1019 ± 2 hPa was determined to be 222°C.

Executive summary:

The boiling temperature was determined using Differential Scanning Calorimetry in a GLP study according to EC A.2, OECD 103 and OPPTS 830.7220. The boiling temperature of the substance at 1019 ± 2 hPa was determined to be 222°C.

Description of key information

The boiling temperature of the substance was determined to be 222°C.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:

222 °C

Additional information

The boiling temperature was determined at 1019 ± 2 hPa using Differential Scanning Calorimetry in a GLP study according to EC A.2, OECD 103 and OPPTS 830.7220.