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Appearance
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Greenish black or black powder
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Infrared spectrum
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Conforms to Structure
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|
Absorption maxima (0.1% in 50% ethanol) l1
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651 - 677 nm
|
|
Extinction Coefficient (at l1)
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Min 28000
|
|
Absorption maxima (0.1% in 50% ethanol) l2
|
397 - 403 nm
|
|
Extinction Coefficient (at l2)
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Min 10000
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Dye content
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Min 65%
|