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Melting point / freezing point

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Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2017
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
Qualifier:
equivalent or similar to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
GLP compliance:
no
Type of method:
differential scanning calorimetry
Specific details on test material used for the study:
Product description: Potassium isooctadecanoate/potassium isostearate
Name: Isooctadecanoic acid, potassium salt
CAS No.: 66469-15-6
Physical state: off white to yellowish solid at 20 °C
Batch No.: PFS-755-169
Re-certification date of batch: 12 December 2017
Purity: 100 % (UVCB)
pH, 10% in DI water 8.0 - 9.0
Stability: stable under test conditions
Storage condition of test material: Room temperature, protected from light



Key result
Melting / freezing pt.:
>= -5 - <= 261 °C
Atm. press.:
1 013 mBar
Decomposition:
no
Remarks on result:
other:
Remarks:
melting area

The melting temperature of the test item was determined in accordance with the test method OECD Guideline 102 “OECD Guideline For The Testing Of Chemicals, adopted by the Council on 27th July 1995, Melting Point/Melting Range” (similar to the test method A.1. “Melting/Freezing Temperature” as described in the Official Journal of the European Communities L383A). The practical test performance was based on the in-house test procedure VTA(S)31X93001.02: "Melting temperature determination (Tm) of solid and liquid substances by means of DSC".

The test item shows possible a melting area of crystalline subcomponents between -5 °C and 260 °C according to the definition in the OECD Guideline 102 (mean value from repeat determination).

-5 °C to 261 °C (from first measurement)

-6 °C to 260 °C (from second measurement)

-5 °C to 258 °C (from third measurement)

Between 308 °C and 312 °C a small melting effect of a part component is visible. The cooling runs show exothermic effects (possible crystallization).

Conclusions:
The test item shows a melting area between -5 °C and 260 °C according to the definition in the OECD Guideline 102 (mean value from repeat determination).
Executive summary:

The test item shows a melting area between -5 °C and 260 °C according to the definition in the OECD Guideline 102 (mean value from repeat determination).

Description of key information

The test item shows a melting area between -5 °C and 260 °C according to the definition in the OECD Guideline 102 (mean value from repeat determination).

Key value for chemical safety assessment

Additional information

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