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Diss Factsheets

Physical & Chemical properties

Melting point / freezing point

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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.:
200 °C

Thermal Stability

The DSC run PN4014 in a closed glass crucible under nitrogen atmosphere is shown in figure 1.The test itemshowed an endothermic effect in the temperature range of 200 – 250 °C,directly followed by an exothermal effect up to 270 °C with an energy of -10 J/g.

Results of the DSC-measurements on thermal stability

No.

Sample weight / mg

Start of effect / °C

Energy / J/g

PN4014

11.65

200
250

50 (endothermic)
-10 (exothermal)

Melting and Boiling Point

In the temperature range of 90 – 150 °C an endothermic effect could be observed. In the temperature range of 200 – 340 °C a first exothermal effect with a decomposition energy of -160 - -190 J/g and in the temperature range of 340 – 500 °C a second exothermal effect with a decomposition energy of -560 J/g could be observed.

In both DSC measurements a mass loss after the complete run in the temperature range from room temperature to 500 °C of 45 - 47 % could be observed.

Results on melting and boiling point

No.

Sample weight / mg

Start of effect / °C

Energy /
J/g

PN4016

9.92

90
200
340

30 (endothermic)
-190 (exothermal)
-560 (exothermal)

PN4017

10.50

90
200
340

40 (endothermic)
-160 (exothermal)
-550 (exothermal)

The test item has no melting point and no boiling point under atmospheric pressure (1013 hPa) up to the decomposition temperature of 200 °C.

Additional Measurement with the BÜCHI apparatus:

For the verification of the DSC measurements an additional measurement with the capillary method was performed. Therefore three capillaries were filled with the test item up to 0.4 cm height. The measurement was started at 25 °C. The temperature was increased with a heating rate of 10 K/min up to a temperature of 410 °C.

Observations of the BÜCHI measurement

Temperature / °C

Observations

238

The colour of the test item changed to light yellow.

346

The colour of the test item changed to light brown.

Up to a temperature of 410 °C no melting or boiling of the test item could be observed.

Conclusions:
The test item zirconium propionate has no melting point and no boiling point at atmospheric pressure (1013 hPa) up to the decomposition temperature of 200 °C.

Description of key information

Zirconium propionate has no melting point and no boiling point at atmospheric pressure (1013 hPa) up to the decomposition temperature of 200 °C.

Key value for chemical safety assessment

Additional information