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Physical & Chemical properties

Melting point / freezing point

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Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
test procedure in accordance with generally accepted scientific standards and described in sufficient detail
Reason / purpose:
reference to same study
Qualifier:
no guideline followed
Principles of method if other than guideline:
The melting point of the pigment was estimated by consulting phase diagram that included the characteristic crystalline phase of the pigment and, as far as possible, had the same composition, through this latter point was not always feasible.
GLP compliance:
no
Type of method:
thermal analysis
Remarks:
Differental Thermal analysis
Melting / freezing pt.:
> 1 000 °C
Decomposition:
no
Sublimation:
no

The DTA test identified no transition in the 100 -1000 °C range that might indicate pigment fusion, it therefore being inferred that the pigment melting point lies at higher temperatures than the maximum temperature in the range examined.

Conclusions:
The DTA test identified no transition in the 100 -1000 °C range that might indicate pigment fusion, it therefore being inferred that the pigment melting point lies at higher temperatures than the maximum temperature in the range examined.

Description of key information

Melting point of the pigment hematite chromium green black is >1000 °C.

Key value for chemical safety assessment

Additional information