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Appearance
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Black-Brown to Orange-Rust Powder
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Absorption maxima (0.01 g/L in 0.1 N NaOH)
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587 - 591 nm
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|
Extinction coefficient
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Min 47000
|
|
Absorption maxima
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375 - 381 nm
|
|
Extinction coefficient
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Min 7000
|
|
Dye content (titration by AgNO3)
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Min 90%
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|
Visual interval (pH 5.2 - 6.8)
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Yellow- Purple
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