Esterification products of alkenylsuccinic anhydride and 2-dialkylaminoethanol

Boiling point

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

study well documented, meets generally accepted scientific principles, acceptable for assessment

Qualifier:

no guideline available

Principles of method if other than guideline:

As the test material was a thick, viscous liquid, it was not possible to determine the boiling point using a conventional method.

The test material (approximately a 2 cm layer) was placed in a beaker and heated on a hotplate. The temperature was recorded using a thermometer.

GLP compliance:

yes

Type of method:

other: Non-standard method

Key result

Atm. press.:

101.3 kPa

Decomposition:

yes

Decomp. temp.:

210 °C

As the test substance was heated to 160 to 165 °C, small bublles formed and it was observed that the colour of the test substance had lightened. At 190 °C, a white vapour appeared which became a constant stream by 210 °C. The boiling point is therefore reported as the decomposition temperature of 210 °C.

Conclusions:

The test material was found to decompose from 210 °C (483 K) without boiling.

Executive summary:

As the test material was a thick, viscous liquid, it was not possible to determine the boiling point using a conventional method. The test material (approximately a 2 cm layer) was placed in a beaker and heated on a hotplate. The temperature was recorded using a thermometer.

As the test substance was heated to 160 to 165 °C, small bublles formed and it was observed that the colour of the test substance had lightened. At 190 °C, a white vapour appeared which became a constant stream by 210 °C. The boiling point is therefore reported as the decomposition temperature of 210 °C.

The test material was found to decompose from 210 °C (483 K) without boiling.

Reference 2

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

14th January 1993 to 18th May 1994

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

equivalent or similar to guideline

Guideline:

EU Method A.2 (Boiling Temperature)

Deviations:

no

GLP compliance:

no

Type of method:

differential scanning calorimetry

Boiling pt.:

> 149 °C

Atm. press.:

ca. 101.3 kPa

Decomposition:

yes

Decomp. temp.:

>= 320 °C

The boiling point of the test material was determined by differential scanning calorimetry (DSC). Two main endothermic transitions were observed in the DSC curve. Two peaks were observed at 231 °C and 342 °C. respectively. Two separate runs were therefore performed with the DSC pans removed from the calorimeter for analysis by FTIR at 220 °C and 320 °C, respectively.

Test conducted at 101.3 kPa. Two endothermic peaks were observed, at 231 and 342 °C.

Samples were examined by FTIR spectroscopy after heating. Material retrieved at 220 °C appeared to be unchanged from the starting material. It was therefore assumed that the first transition was boiling (with an onset temperature of 149 °C). Material retrieved at 320 °C indicated that decomposition had occurred.

Conclusions:

Two endothermic peaks were observed, at 231 and 342 °C. Samples were examined by fourier transform IR spectroscopy after heating. Material retrieved at 220 °C appeared to be unchanged from the starting material. It was therefore assumed that the first transition was boiling (with an onset temperature of 149 °C). Material retrieved at 320 °C indicated that decomposition had occurred.

Executive summary:

The boiling point of the test material was determined by differential scanning calorimetry (DSC). Two main endothermic transitions were observed in the DSC curve. Two peaks were observed at 231 °C and 342 °C. respectively. Two separate runs were therefore performed with the DSC pans removed from the calorimeter for analysis by

fourier transform infra-red spectroscopy (FTIR) at 220 °C and 320 °C, respectively.

Samples were examined by FTIR spectroscopy after heating. Material retrieved at 220 °C appeared to be unchanged from the starting material. It was therefore assumed that the first transition was boiling (with an onset temperature of 149 °C). Material retrieved at 320 °C indicated that decomposition had occurred.

Description of key information

The test material was found to decompose before boiling.