Phenylacetylene

Stability: thermal, sunlight, metals

Administrative data

Endpoint:

thermal stability

Type of information:

experimental study

Adequacy of study:

key study

Study period:

08-14 March 2022

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Justification for type of information:

The study was conducted according to an internationally recognised method, and under GLP. No deviation affected the quality of the study. The substance is adequately identified. Therefore full validation applies.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2022

Report date:

2022

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

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

Version / remarks:

1981

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Remarks:

GLP-BESCHEININGUNG Statement of GLP Compliance (inspected on 28-29 Avril 2021, signed on 21 June 2021)

Test material

Test material information

Constituent 1

Reference substance name:

Phenylacetylene

EC Number:

208-645-1

EC Name:

Phenylacetylene

Cas Number:

536-74-3

Molecular formula:

C8H6

IUPAC Name:

ethynylbenzene

Test material form:

liquid

Results and discussion

For thermal stability study

Test substance thermally stable:

ambiguous

Remarks:

exothermic event at 56.07°C [assuming decomposition]

Operating temperature

Key result

Operating temp.:

>= 0 - <= 520 °C

Remarks on result:

other: An unique exothermic event was observed at 56.07 °C (onset)

Sublimation:

not determined

Transformation products:

not specified

For study on stability to sunlight

Test substance stable to sunlight:

not determined

For study on stability to metals

Test substance stable to metals / metal ions:

not determined

Any other information on results incl. tables

Results

Table 1 - Values DSC Indium (Calibration)

Expected Melting point	Measured Melting point	Expected Energy	Measured Energy	Assessment
156.6 ± 1.0°C	156.41 °C	28.45 ± 1.0 J/g	28.41 J/g	OK

Table 2 - DSC Screening of the Test Item

	Temperature [°C]	Energy [J/g]
Exothermal event	56.07 (Onset)	-142.79 (the minus symbol is stated for the energy of exothermic event)

The crucible was visually unchanged after the test.

 

Applicant's summary and conclusion

Conclusions:

The released energy at 56.07°C (onset) was determined to be 142.79 J/g.

Executive summary:

The thermal profile of the test substance between 0°C and 520°C was determined during a GLP study according to the OECD giuidelmine, using a DSC method.

During the DSC run an exothermic event was observed at an onset of 56.07 °C and this was integrated to derive the related energy (in J/g). The related energy of the observed exothermic event was 142.79 J/g.