Registration Dossier

Diss Factsheets

Administrative data

Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2016
Report date:
2016

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EPA OPPTS 830.7200 (Melting Point / Melting Range)
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
GLP compliance:
yes
Type of method:
differential scanning calorimetry

Test material

Constituent 1
Chemical structure
Reference substance name:
Reaction products of diphenyl ether and 9-methylene nonadecane
EC Number:
943-303-1
Molecular formula:
Variable, substance is a UVCB
IUPAC Name:
Reaction products of diphenyl ether and 9-methylene nonadecane
Test material form:
liquid

Results and discussion

Melting / freezing point
Melting / freezing pt.:
-70 °C
Atm. press.:
101.3 kPa
Decomposition:
yes
Decomp. temp.:
> 375 °C
Sublimation:
no
Remarks on result:
other: value is glass transition state

Any other information on results incl. tables

Preliminary test: From 375°C upwards the weight of the sample decreased significantly. At 446°C the sample weight had decreased by 25%. After the experiment, a molten yellow residue remained in the sample container (original

colour: colourless). The change of the colour indicated reaction and/or decomposition of the test item.

Main study:

During cooling an endothermic effect/glass transition (Tg) of the test item was observed between -60°C and -90°C. During heating an endothermic effect/glass transition (Tg) was observed between - 90°C and -25°C. The inflection point was 70.1°C. Starting at 325°C, the DSC curve showed a small endothermic effect. The effect was most likely due to the start of reaction and/or decomposition, based on the results obtained by the preliminary test. After the experiment, the test item did not changed.

To further investigate the endothermic effect of the test item, two subsamples of the test item were stored for 17 hours at -23.8 ± 0.4°C and at -81.7 ± 2.6°C respectively. It was observed after storage that the test item was a viscous liquid (-20°C freezer) and a solid (-80°C freezer). According to this it was concluded that the effect between -90°C and -25°C was considered to be due to melting.

An additional experiment was performed to determine the duplicate melting temperature of the test item.

Similar results as with the first experiment were obtained. The endothermic effect/glass transition was 69.7°C. After the experiment, the test item did not change. The glass transition was determined as the average glass transition obtained from experiment 1 (-70.068°C) and experiment 2 (-69.701°C).

Applicant's summary and conclusion

Conclusions:
The melting point of the test substance was determined as -70°C (203K) by applying a storage experiment in the freezer and by measuring the temperature of the endothermic effect/glass transition using DSC.