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Appearance
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Blue coloured solution
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Absorption maxima (diluted 1: 250 in methanol) λ1
|
640 – 645 nm
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|
Absorption maxima (diluted 1: 250 in methanol) λ2
|
522 – 525 nm
|
|
UV absorbance (at lmax1; diluted 1:250 in methanol)
|
0.800 – 1.000
|
|
UV absorbance (at lmax2; diluted 1:250 in methanol)
|
0.420 – 0.700
|
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Suitability (for microscopy)
|
Passes test
|