Petroleum resins

Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

18. Jun. 2018 to 19. Jun. 2018

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling Point)

Version / remarks:

OECD Guideline No. 103 “Boiling Point“, dated 27. Jul. 1995

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.2 (Boiling Temperature)

Version / remarks:

EU-Method A.2 of 30 May 2008, published on 31. May 2008, “Boiling Temperature“

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

differential scanning calorimetry

Specific details on test material used for the study:

No further details specified in the study report.

Key result

Boiling pt.:

> 400 °C

Decomposition:

no

Remarks on result:

other: Atm. pressure not specified

Pre-test following Siwoloboff

All observations of the Pre-test following Siwoloboff are presented in the following table.

 

Pre-test following Siwoloboff

Observations	Temperatures in °C
Individual bubble visible	355
Gas burner switched off	400

 

Note: As the test item is dark brown it the observation was made at the surface

 

After cooling down the test item was visually like the original test item.

 

Security Pre-test for the DSC instrument

The crucible was found visually unchanged after reaching a temperature of 450 °C. The weight of the crucible was recorded with 53.82 mg.

 

Values DSC Indium

Expected Melting point	Measured Melting point	Expected Energy	Measured Energy	Assessment
156.6 ± 1.0 °C	156.51 °C (onset)	28.45 ± 1.0 J/g	28.53 J/g	OK

 

The measurement of indium after calibration met the validity criteria.

 

Values DSC Test Item first determination

[°C]	Temperature [°C]	Energy
Start of an endothermic event	403.95	19.44 mW
Highest measured temperature	440.70	20.31 mW

 

Observations

Values Observations

	Mass test item	Mass crucible (before measurement):	Mass crucible (after measurement):	Observations
First Measurement	4.62 mg	50.16 mg	49.42 mg	After the test the crucible was visually unchanged

 

Interpretation of the measurements

No complete event was detected. The beginning of an endothermic event was visible at 403.9 5°C, which could be the beginning of the boiling phase.

Conclusions:

The determination of the boiling point was determined via DSC (differential scanning calorimetry).
One DSC measurement was performed from 25°C to 445°C (limit of the instrument), but no complete event could be detected.
After consulting the sponsor, the boiling point is stated as >400°C (673.15 K).

No observations were made which might cause doubts on the validity of the study outcome. Therefore, the result of the study is considered valid.

Executive summary:

Determination of the boiling point of Petroleum Resins (Kendex 0897) according to OECD 103 resp. EU A.2

 

Findings and Results:

The determination of the boiling point was determined via DSC (differential scanning calorimetry).

One DSC measurement was performed from 25 °C to 445 °C (limit of the instrument), but no complete event could be detected.

After consulting the sponsor, the boiling point is stated as >400 °C (673.15 K).

Description of key information

The boiling point is stated as >400 °C (673.15 K).

Key value for chemical safety assessment

Boiling point at 101 325 Pa:

400 °C

Additional information

The determination of the boiling point was determined via DSC (differential scanning calorimetry).

One DSC measurement was performed from 25 °C to 445 °C (limit of the instrument), but no complete event could be detected.

After consulting the sponsor, the boiling point is stated as >400 °C (673.15 K).