Prussian blue
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Prussian Blue
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Color Index
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Pigment Blue 27 CI 77510 / 77520
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Formula
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M+ Fe3+ [Fe2+ (CN)6], H2O
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Structure
Prussain blue has a cubic structure. In the molecule, M+ can be potassium, sodium
or ammonium.
Properties
This pigment can also be called Milori blue, iron blue, or Berlin blue.
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Properties of prussian Blue
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Property
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Prussian Blue
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Solvent resistance
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excellent
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Heat Stability
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moderate-good
140°C
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Alkali stability
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poor
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Light fastness
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excellent
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Color
It gives an intense, strong color.
Hygroscopy
Because of its hygroscopy (approx. 4% of water), Prussian blue is difficult to wet.
Flammability
This pigment is flammable. By burning, it produces HCN, NH3, CO, and CO2 gases.
Uses
This pigment is mainly used in printing inks. It can also be used in industrial
coatings and in automotive paints.
