Fatty acids, C9-13-neo-, barium 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:

2018-01-31 to 2018-06-06

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline 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 tightly closed

Atm. press.:

>= 1 007.3 - <= 1 008.2 hPa

Decomposition:

yes

Decomp. temp.:

>= 350 °C

Remarks on result:

other: the test item has no defined melting and boiling point

Melting and Boiling Point (DSC)

In the temperature range of 350 °C to 550 °C, an endothermic effect was detected in both measurements in aluminium crucibles and in the temperature range of 380 °C to 530 °C, an endothermic effect was detected in the DSC measurement in a glass crucible.

Results of the DSC-measurements

No.	Sample weight [mg]	Onset of Effect [°C]	Range of effect [°C]	Weight loss	Atmospheric pressure [hPa]	Remarks
PN14641	7.77	---	390 – 550 (endo)	4.28 mg 55 %	1007.3	open aluminium crucible under air
PN14642	10.35	---	350 – 530 (endo)	5.83 mg 56 %	1007.3	open aluminium crucible under air
PN15681	16.34	---	380 – 530 (endo)	9.15 mg 56 %	1008.2	open glass crucible under air

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

In view of the fact that the measured weight loss of each sample was only between 55 % and 56 % of the respective initial sample weight, none of the observed endothermic effects can be assigned to boiling of fatty acids, C9-C13-neo, barium salts. It is assumed, that the test item decomposes at temperatures > 350 °C.

Measurements by the capillary method

For verification of the results the test item was additionally tested with the capillary method. The test item started to shrink at a temperature approx. 280 °C. The test item started to change the colour at ~370 °C. The measurement was stopped at 400 °C with a brown/black residue remaining in the capillary. Neither a melting nor a boiling of the test item could be observed.

Thermal Stability (DSC)

In the temperature range of 290 °C to 550 °C an endothermic effect  was observed.

Results of the DSC-measurements

No.	Sample weight [mg]	Start of effect [°C]	Energy [J/g]
PN14568	9.10	330	280 (endothermic)
PN14630	5.16	380	220 (endothermic)
PN14631	10.15	290	650 (endothermic)

It is assumed, that the test item decomposes at temperatures > 290 °C.

Conclusions:

Melting and Boiling Point
No definitive signs of melting/boiling of the test item Fatty acids, C9-C13-neo, barium salts were observed by differential scanning calorimetry (DSC) measurements (open aluminium and open glass crucible, under air, up to 600 °C, heating rate of 10 K/min) and by the capillary method (up to 400 °C, heating rate of 10 K/min). The measurements were performed according to Regulation (EC) No. 440/2008 Method A.1./A.2. and OECD Test Guideline 102/103 (1995) at atmospheric pressure (1007 – 1008 hPa). The test item decomposes with a weight loss of >55 % at temperatures >350 °C.

Thermal Stability
Fatty acids, C9-C13-neo, barium salts showed an (endothermal) decomposition at temperatures >290 °C and no exothermic decomposition up to 600 °C in DSC measurements (closed glass crucible under air, heating rate: 3 K/min) according to OECD Test Guideline 113 (1981).

Description of key information

No definitive signs of melting/boiling of the test item fatty acids, C9-C13-neo, barium salts were observed. The test item decomposes with a weight loss of >55 % at temperatures >350 °C.

Additional information

Melting and Boiling Point

No definitive signs of melting/boiling of the test item Fatty acids, C9-C13-neo, barium salts were observed by differential scanning calorimetry (DSC) measurements (open aluminium and open glass crucible, under air, up to 600 °C, heating rate of 10 K/min) and by the capillary method (up to 400 °C, heating rate of 10 K/min). The measurements were performed according to Regulation (EC) No. 440/2008 Method A.1./A.2. and OECD Test Guideline 102/103 (1995) at atmospheric pressure (1007 – 1008 hPa). The test item decomposes with a weight loss of >55 % at temperatures >350 °C.

Thermal Stability

Fatty acids, C9-C13-neo, barium salts showed an (endothermal) decomposition at temperatures >290 °C and no exothermic decomposition up to 600 °C in DSC measurements (closed glass crucible under air, heating rate: 3 K/min) according to OECD Test Guideline 113 (1981).