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Contact SupplierAppearance | Yellow to Tan Coloured Powder |
Dye content (by spectrophotometry) | Min 95% |
Identity (IR) | Passes test |
pH 3.8-5.4 | Yellow to blue |
Appearance of solution | Conforms |
Absorption maxima (0.003% Methanol) | 418 – 428 nm |
Molar Absorptivity at lambda max | Min 17000 |
Loss on drying (at 110°C) | Max 3% |
Transition range (according to ACS) | Passes test |
Sensitivity | Passes test |