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Appearance
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Dark green to blackish powder
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Absorption maxima in methanol (λmax1)
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645-655 nm
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Absorption maxima in methanol (λmax2)
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520-525 nm
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Absorptivity (A 1%/1cm; at λmax; in methanol; on dried substances)
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Min 1250
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Absorptivity (A 1%/1cm; at λmax; in methanol; on dried substances)
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Min 400
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Loss on drying (at 110°C)
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Max 10%
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