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Physical & Chemical properties

Melting point / freezing point

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melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
from 9 June 2005 to 2 September 2005
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose for cross-reference:
reference to same study
according to guideline
OECD Guideline 102 (Melting point / Melting Range)
GLP compliance:
yes (incl. QA statement)
Type of method:
differential scanning calorimetry
Key result
Melting / freezing pt.:
> 400 °C
Atm. press.:
1 013 hPa
Decomp. temp.:
ca. 120 - 130 °C

In the preliminary test, there was no endothermic heat effect observed from which melting point or boiling point could be deduced. An exothermic heat effect was detected starting at about 130°C. After the experiment, the sample was black and agglutinated but not molten.


To confirm the result, two further DSC runs were performed. No endothermic reaction could be observed. Starting at about 120°C an exothermic reaction was observed. After both experiments, the sample had lost about 35% of its mass and the sample was black and agglutinated.

Iron oxide isostearate did not melt under the conditions of the test.
Executive summary:

Iron oxide isostearate was tested according to OECD Guideline 102 under GLP-compliance.

The test item did not melt under the conditions of the test.

Melting point > 400 °C.

Description of key information

Melting point is higher than 400°C.

Key value for chemical safety assessment

Additional information

A GLP experimental study, according to OECD guideline 102 and scored as Klimisch 1, is selected as a key study, giving a melting point > 400°C.