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Dye content (Spectrophotometry)
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> 94%
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Appearance
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Dark red to brown
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Solubility 0.1% (95% EtOH)
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Clear to slightly hazy
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Absorption Maximum (50% ethanol with 1ml 1% Na2CO3)
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529 - 535 nm
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Absorptivity (A1%,1cm,in 50% ethanol with 1ml 1% Na2CO3
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> 1260
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Loss on drying at 110°C (1hr.)
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(< 5%)
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