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Appearance
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White powder
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Infrared spectrum
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Conforms
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Visual transition interval
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from pH 8.8 (Colorless) to pH 10.5 (blue)
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Absorption maxima
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592 - 596 nm
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Clarity of solution
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Dissolve 0.1 g in 100 mL of alcohol. Not more than a faint trace of turbidity or insoluble matter should remain
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