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