Beta-naphthol
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Beta-Naphthol
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Color Index
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Pigment Red 3,4 & Pigment Orange 5
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Structure
The molecule possesses a nitro group which imparts insolubility and light fastness.
Beta-Naphthol structure - Pigment Red 3
Properties
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Properties of beta-naphthol
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Property
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Zinc Oxide
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Heat stability
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moderate
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Solvent resistance
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limited
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Chemical resistance
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good
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Light fastness
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good
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Color
Beta-Napthol red pigments have a narrow color range: mid red to orange. Toluidine
red (Cl Pigment Red 3) and dinitroaniline orange (Cl Pigment Orange 5) can be obtained
in a variety of tones. Much depends on the particle size distribution of the commercial
products and the manufacturing conditions.
Uses
Beta-Naphthol red pigments are used in solvent-based and water-based decorative
paints and industrial paints.
Price
These pigments are relatively cheap.
