2-ethylhexanoic acid, zirconium salt

Melting point / freezing point

Link to relevant study record(s)

Reference

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:

other: Guideline study

Reason / purpose for cross-reference:

reference to same study

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Deviations:

no

GLP compliance:

no

Type of method:

other: differential scanning calorimetry (DSC)

Atm. press.:

1 013 hPa

Decomposition:

yes

Decomp. temp.:

ca. 210 °C

Thermal Stability

The DSC run PN4015 in a closed glass crucible under nitrogen atmosphere is shown in figure 1.The test itemshowed a slight endothermic effect in the temperature range of 210 – 230 °C, which can be attributed to a first decomposition process of the test item. An exothermal effect could be observed in the temperature range of 320 - 390°C with an energy of -90 J/g. This effect represents the decomposition of the test item. To verify this assumption, an additional measurement in a capillary was performed.

Results of the DSC-measurements on thermal stability

No.	Sample weight / mg	Start of effect / °C	Energy / J/g
PN4015	11.02	210 320	10 (endothermic) -90 (exothermal)

Melting and Boiling Point

In the temperature range between 370 – 500 °C an endothermic effect was detected, which cannot be allocated to the melting of the test item, but to the decomposition of the test item.

In both DSC measurements amass loss after the complete run in the temperature range from room temperature to 500°C of approximately 56 % was observed, which suggests a decompositionunder liberation of a gaseous compound.

Results of the DSC-measurements

No.	Sample weight / mg	Start of effect / °C	Energy / J/g
PN4021	10.90	380 (endothermic)	140
PN4231	11.24	370 (endothermic)	210

In the BÜCHI measurement the test item has no melting and no boiling point at atmospheric pressure up to 410 °C. At 249 °C the decomposition of the test item started. In the upper (colder) part of the capillary, condensed droplets appeared at a temperature of approximately 300 °C, which can partly explain the mass loss in the DSC measurements.

Observations of the BÜCHI measurement

Temperature / °C	Observations
249	The colour of the test item changed to light brown
326	The colour of the test item changed to brown

Final Results

The test item Zirconium 2-ethylhexanoate salt has no melting and no boiling point at atmospheric pressure (1013 hPa) in the temperature range 25 – 500 °C. The test item decomposes prior to melting, starting at a temperature of approximately 210 °C.

Conclusions:

The test item Zirconium 2-ethylhexanoate salt has no melting and no boiling point at atmospheric pressure (1013 hPa) in the temperature range 25 – 500 °C. The test item decomposes prior to melting, starting at a temperature of approximately 210 °C.

Description of key information

Zirconium 2-ethylhexanoate salt has no melting and no boiling point at atmospheric pressure (1013 hPa) in the temperature range 25 – 500 °C. The test item decomposes prior to melting, starting at a temperature of approximately 210 °C.