CAS, 54739-18-3 Appearance: A colourless to fawn-coloured transparent liquid Solubility: Insolubility in water, freely soluble in toluene/in ethanol (96%) and in methanol Acetonitrile: Not more than 100ppm Impurity B: 0.5% max Impurity C: 0.3% max Impurity A: 0.2% max Impurity ...