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Appearance
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Dark Red to Purple Powder
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Identity (IR)
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Conforms to structure
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Suitability (as indicator in complexometric titration)
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Passes test
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Absorption maxima (0.001% in water)
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About 521nm
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Specific absorptivity A1%/1cm (water; 521nm)
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Min 300
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Sulphated ash
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Max 1.0%
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Loss on drying (at 105°C)
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Max 2.0%
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