Properties: Greenish-black crystals with metallic sheen. When R = toluyl the solubility in water at 20° is about 9.5% w/w giving bright greenish-blue solutions. Soly in absolute ethanol about 6.0, Cellosolve 6.0, ethylene glycol 3.25. Practically insoluble in xylene.
Use: Gelling agent for lubricating fluids. As bacterial stain. To dye histiocytes and fibroblasts in vivo: McManus, Bailie, Fed. Proc.
22, no. 2, part I, p 190 (March-April 1963).
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