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Diss Factsheets

Administrative data

Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
19 Jun 2019 - 02 Aug 2019
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2020
Report date:
2020

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Version / remarks:
2016
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Version / remarks:
1995
Deviations:
no
Qualifier:
according to guideline
Guideline:
EPA OPPTS 830.7200 (Melting Point / Melting Range)
Version / remarks:
1998
Deviations:
no
Principles of method if other than guideline:
An additional experiment was performed in which the consistency of the substance was determined by visual observation after samples had been placed at approx. -20°C and -80°C. The additional experiment is not a guideline study but was described in sufficient detail in the study report.
GLP compliance:
yes
Type of method:
other: 'differential scanning calorimetry' and 'storage in freezer'

Test material

Constituent 1
Chemical structure
Reference substance name:
Salts of phosphoric acid, 2-ethylhexyl esters with C16-18 (even numbered) and C18-unsaturated-alkylamines
EC Number:
949-859-1
Molecular formula:
not applicable
IUPAC Name:
Salts of phosphoric acid, 2-ethylhexyl esters with C16-18 (even numbered) and C18-unsaturated-alkylamines
Test material form:
liquid
Details on test material:
- Appearance: Clear yellow liquid
- Storage condition: At room temperature

Results and discussion

Melting / freezing point
Key result
Melting / freezing pt.:
< -83.3 °C
Decomposition:
yes
Decomp. temp.:
ca. 200 °C

Any other information on results incl. tables

TGA EXPERIMENT (PRELIMINARY TEST)

Decrease of weight from 150°C upwards: 25% at 288°C and 70% at 374°C.

After the experiment, a light yellow soapy residue remained in the sample container and a soapy residue was observed on the lid of the sample container. The change of the colour indicated reaction and/or decomposition of the test item.

 

DSC EXPERIMENT 1

During cooling, no effects were observed. During heating an endothermic effect was observed between 0°C and 100°C followed by an endothermic effect starting at 200°C. The first endothermic effect was most likely obtained due to the evaporations of impurities. The second endothermic effect was probably obtained due to reaction and/or decomposition of the test item. After the experiment, a light yellow molten residue remained in the sample container. The change of the colour indicated reaction and/or decomposition of the test item.

DSC EXPERIMENT 2

To investigate the endothermic effect between 0°C and 100°C, Experiment 2 was stopped directly after this effect. After the experiment, the residue remained in the sample container was unchanged by colour. Based on this visual observation, it was concluded that the effect was probably obtained due to the evaporation of volatile components.

STORAGE IN FREEZER

After storage in a freezer (-20.8 ± 1.7°C) for 41 hours, the test item was observed to be a viscous liquid.

After storage in a freezer (-83.3 ± 1.9°C) for 41 hours, the test item was observed to be a very viscous liquid.

Applicant's summary and conclusion

Conclusions:
The substance has no melting/freezing point down to -83.3°C.
Executive summary:

Differential Scanning Calorimetry was performed. The experiments were in accordance with EC A.1, OECD 102 and OPPTS 830.7200 (melting temperature) and on EC A.2, OECD TG 103 and OPPTS 830.722 (boiling temperature). GLP-study. There was no DSC effect due to melting/freezing of the liquid substance between 25°C and -90°C. An additional non-guideline experiment 'Storage in freezer' was therefore performed in which samples were placed at approximately -20°C and -80°C. As freezing was not observed in each of the experiments, it was concluded that the substance has no melting/freezing point at temperatures down to -83.3°C.

Boiling of the substance was not observed below the temperature at which reaction and/or decomposition started (i.e. at 200°C).