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Appearance
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Black, very dark brown or very dark Green powder
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Absorption maxima (λmax1)
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520 - 525 nm
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Absorption maxima (λmax2)
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648 - 653 nm
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Specific absorptivity 1%/1cm (at λmax1)
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Min 600
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Specific absorptivity 1%/1cm (at λmax2)
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Min 1100
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Loss on drying (at 105°C)
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Max 10.0%
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Solubility
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0.1% in methanol is clear blue with greenish fluorescence
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