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Appearance
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An orange to brown crystalline powder
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Clarity of Solution ( 0.1 g/100 ml; water
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Not more than a trace of turbidity or insoluble matter should remain
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Suitability (as complexometric indicator)
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Passes test
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Absorption maxima
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411 – 415 nm (in distilled water)
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Absorptivity
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Min 1300 ( 1%/1cm ;distilled water)
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Loss on drying (at 110°C; 1 hr)
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Max 8.0
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