red light yellow. In ethanol from crystallization out for brown acicular crystal, from benzene in crystallization out for yellow brown acicular crystal, melting point 136 ℃. Soluble in ethanol, Acetone and Benzene. In concentrated sulfuric acid for yellow brown, dilution after light yellow, In concentrated Sodium hydroxide solution slightly soluble. Used to varnish, oil and paraffin color.
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Standard
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Light Fastness
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Heat-resistant(℃)
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water
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Sodium Carbonate(5%)
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Hydrochloric acid(5%)
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Melting point
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Stable
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ISO
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Good
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136
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Insoluble
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