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Appearance
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Brownish red fine powder
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Absorption maxima
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515 - 518 nm
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Dye content (by spectrophotometry)
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Min 90%
|
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Solubility (0.1% in water)
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Clear solution
|
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Absorptivity (A 1%/1cm; at λmax; in water)
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1200 - 1400
|
|
Loss on drying (at 110°C)
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Max 8%
|
|
Copper (Cu)
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Max 0.005%
|
|
Iron (Fe)
|
Max 0.005%
|
|
Nickel (Ni)
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Max 0.005%
|
|
Lead (Pb)
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Max 0.005%
|
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Suitability (for microscopy)
|
Passes test
|