naphthyl blue

[NAPHTHALINE-BLUE.] naphthyl-carbamide, s. Chem.: C11H10N2O=N2(CO) C10H7H3. Obtained by saturating an ethereal solution of naphthylamine with cyanic acid gas, and recrystallizing from hot alcohol. It forms flat, shining, flexible needles, insoluble in water, slightly soluble in alcohol, very soluble in ether. From its ethereal solution oxalic acid throws down a crystalline precipitate. naphthyl carbonic-acid, s. [NAPHTHOIC-ACID.] naphthyl-cyanate, s. CN Chem.: C1H-NO=CH { pletely saturates alkalies, but its salts with the ing dinaphthyl-carbamide with phosphoric anhy heavy metals have an acid reaction. The naph dride. It forms easily fusible crystals, insoluble in thionates are all soluble, and their solutions are water, soluble in alcohol and ether. opalescent, transmitting, when viewed at different angles, beautiful red, blue, and violet colors. năph-tho- (or phas p), pref. [Eng. naphthaIlene), and o( xygen ).] Containing naphthalene and oxygen.