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Appearance
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Yellow to orange brown powder
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Melting point
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110 - 116°C
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Transition range pH 2.9 to pH 4.0
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Red to yellow
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Appearance of solution
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0.1% solution in ethanol is clear
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Absorption maxima in ethanol
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403 - 407 nm
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Specific absorptivity A 1%/1cm (λmax; 0.005%; ethanol; calculated on dried substance)
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1100 - 1300
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Loss on drying (40°C; 1 hpa)
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Max. 5.0%
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