Fatty acids, tallow, compds. with triethanolamine

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:

24 November 2015 to 6 September 2016

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

differential scanning calorimetry

Key result

Melting / freezing pt.:

<= -60 °C

Atm. press.:

ca. 98.8 kPa

Decomposition:

yes

Decomp. temp.:

> 355 - < 356 °C

Remarks on result:

other: Atmospheric pressure not specified.

The sample weights for Test 1 and Test 2 were 6.73 and 7.29 mg respectively. The melting temperature was <-60 °C and decomposition was observed to begin at 356 °C for test 1 and 355 °C for test 2, this is characterised by an exothermic event.

Two artefacts at about -40 °C and 20 °C were observed but are too small to be attributed to an effect such as melting.

Conclusions:

Under the conditions of the study, the melting temperature was determined to be < -60 °C.

Executive summary:

The melting point of the test material was investigated in accordance with the standardised guideline OECD 102 under GLP conditions.

The melting point of the test material was determined through differential scanning calorimetry. Aliquots of test material (6.73 mg and 7.29 mg) were weighed into 40 µL aluminium crucibles and a lid with a 50 µm diameter orifice cold welded on to them. Each crucible was subjected to the same heating regime, with an air flow of 50 mL/min. The test material is a liquid at room temperature, so the test was started at -60 °C, isothermal for 15 minutes, then heating at 5 °C/min to 20 °C and then 10 °C/min to 400 °C. The sample weights for Test 1 and Test 2 were 6.73 and 7.29 mg respectively. The melting temperature was <-60 °C and decomposition was observed to begin at 356 °C for test 1 and 355 °C for test 2, this is characterised by an exothermic event. Two artefacts at about -40 °C and 20 °C were observed but are too small to be attributed to an effect such as melting.

Under the conditions of the study, the melting temperature was determined to be < -60 °C.

Description of key information

Under the conditions of the study, the melting temperature was determined to be < -60 °C.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:

-60 °C

Additional information

The melting point of the test material was investigated in accordance with the standardised guideline OECD 102 under GLP conditions. The study was assigned a reliability score of 1 in accordance with the criteria for assessing data quality set forth by Klimisch et al. (1997)

The melting point of the test material was determined through differential scanning calorimetry.Aliquots of test material (6.73 mg and 7.29 mg) were weighed into 40 µL aluminium crucibles and a lid with a 50 µm diameter orifice cold welded on to them. Each crucible was subjected to the same heating regime, with an air flow of 50 mL/min. The test material is a liquid at room temperature, so the test was started at -60 °C, isothermal for 15 minutes, then heating at 5 °C/min to 20 °C and then 10 °C/min to 400 °C. The sample weights for Test 1 and Test 2 were 6.73 and 7.29 mg respectively. The melting temperature was <-60°C and decomposition was observed to begin at 356 °C for test 1 and 355 °C for test 2, this is characterised by an exothermic event. Two artefacts at about -40 °C and 20 °C were observed but are too small to be attributed to an effect such as melting.

Under the conditions of the study, the melting temperature was determined to be < -60 °C.