Fatty acids, C6-19-branched, copper(2+) salts

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

Study period:

2018-04-09 to 2018-09-18

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Reason / purpose for cross-reference:

reference to same study

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Version / remarks:

1995

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Version / remarks:

2008

Deviations:

no

Qualifier:

according to guideline

Guideline:

other: Thermal Stability (OECD 113)

Version / remarks:

1981

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Remarks:

signed 2017-02-28

Type of method:

differential scanning calorimetry

Specific details on test material used for the study:

Storage Conditions: Room temperature, sealed container

Melting / freezing pt.:

>= -30 - <= 0 °C

Atm. press.:

>= 1 002 - <= 1 012.6 hPa

Decomposition:

yes

Decomp. temp.:

>= 190 °C

Sublimation:

no

Melting and Boiling Point (DSC and Measurement in Test Glass)

In both DSC runs endothermic effects were observed in the temperature ranges from -30 °C to 0 °C, from 40 °C to 120 °C, from 140 °C to 250 °C, from 250 °C to 320 °C and from 430 °C to 600 °C. In both DSC runs no exothermic effect was detected.

Results of the DSC-measurements

No.	Sample weight [mg]	Onset of Effect [°C]	Range of effect [°C]	Weight loss	Atmospheric pressure [hPa]
PN15493	7.89	-33.93 32.03 208.09 282.78 453.91	-30 – 0 (endo) 40 – 110 (endo) 140 – 250 (endo) 250 – 320 (endo) 430 – 600 (endo)	6.92 mg 88 %	1002.0
PN15495	16.18	-32.48 56.89 205.54 275.59 493.32	-30 – 0 (endo) 60 – 120 (endo) 180 – 240 (endo) 260 – 320 (endo) 460 – 590 (endo)	14.21 mg 88 %	1012.6

It is not possible to assign any of the observed endothermic effects definitely to melting or boiling of the test item.

For verification of the DSC results the test item was additionally tested in a test glass. Liquefaction of the test item was observed at approx. -10 °C. At approx. 200 °C small bubbles started to form and to rise in the test glass. The temperature of the test glass was not increased further.

Thermal stability (DSC)

An endothermic effect was observed starting at 190 °C. At 420 °C the DSC signal showed a high noise so that the thermograms at temperatures above 420 °C cannot be interpreted without doubt.

 Results of the DSC-measurements

No.	Sample weight [mg]	Start of effect [°C]	Energy* [J/g]
PN15417	11.71	190	20 (endothermic)
PN15503	14.10	190	20 (endothermic)

* Positive energy for endothermic processes

Conclusions:

Melting and Boiling Point:
In the differential scanning calorimetry measurements according to Regulation EC No. 440/2008 Methods A.1./A.2. and OECD Test Guidelines 102/103 (1995) at atmospheric pressure (1002.0 and 1012.6 hPa) endothermic effects were observed in the temperature ranges from -30 °C to 0 °C, from 40 °C to 120 °C, from 140 °C to 250 °C, from 250 °C to 320 °C and from 430 °C to 600 °C.
The visual observation of the test item being heated in a test glass gave that the test item liquefied at approx. -10 °C and that small bubbles started to form and to rise in the test glass at approx. 200 °C.
Based on the results and observations, it may be assumed that the test item has a melting range between -30 °C and 0 °C and decomposes before boiling at temperatures ≥ 190 °C.

Thermal Stability:
The test item showed an endothermic effect starting at 190 °C, but no exothermic effects up to a temperature of 420 °C. At 420 °C the DSC signal showed a high noise so that the thermograms above this temperatures cannot be interpreted without doubt.

Description of key information

No distinct phase transitions, melting and boiling can be derived for the test item. It may be assumed that the test item has a melting range between -30 °C and 0 °C and decomposes before boiling at temperatures ≥ 190 °C.

Additional information

Melting and Boiling Point:

In the differential scanning calorimetry measurements according to Regulation EC No. 440/2008 Methods A.1./A.2. and OECD Test Guidelines 102/103 (1995) at atmospheric pressure (1002.0 - 1012.6 hPa) endothermic effects were observed in the temperature ranges from -30 °C to 0 °C, from 40 °C to 120 °C, from 140 °C to 250 °C, from 250 °C to 320 °C and from 430 °C to 600 °C.

The visual observation of the test item being heated in a test glass gave that the test item liquefied at approx. -10 °C and that small bubbles started to form and to rise in the test glass at approx. 200 °C.

Based on the results and observations, it may be assumed that the test item has a melting range between -30 °C and 0 °C and decomposes before boiling at temperatures ≥ 190 °C.

Thermal Stability:

The test item showed an endothermic effect starting at 190 °C, but no exothermic effects up to a temperature of 420 °C. At 420 °C the DSC signal showed a high noise so that the thermograms above this temperatures cannot be interpreted without doubt.