1-[(4-nitrophenyl)azo]naphthalen-2-amine

4-Nitrobenzenamine diazotization, and Naphthalen-2-amine coupling.

Dull reddish blue to reddish violet solid or dark maroon powder.

Dust can be explosive when suspended in air at specific concentrations. Insoluble in water.

1-[(4-nitrophenyl)azo]naphthalen-2-amine is an azo compound. Azo, diazo, azido compounds can detonate. This applies in particular to organic azides that have been sensitized by the addition of metal salts or strong acids. Toxic gases are formed by mixing materials of this class with acids, aldehydes, amides, carbamates, cyanides, inorganic fluorides, halogenated organics, isocyanates, ketones, metals, nitrides, peroxides, phenols, epoxides, acyl halides, and strong oxidizing or reducing agents. Flammable gases are formed by mixing materials in this group with alkali metals. Explosive combination can occur with strong oxidizing agents, metal salts, peroxides, and sulfides.

Flash point data for 1-[(4-nitrophenyl)azo]naphthalen-2-amine are not available. 1-[(4-nitrophenyl)azo]naphthalen-2-amine is probably combustible.

dark blue light red to dark red light purple. From ethanol to crystallize in the product is golden needle crystal, melting point 185.5 ℃ soluble in ethanol, acetone and toluene. In concentrated sulfuric acid to red light blue, dilution after magenta to red solution, there are red brown precipitation; In concentrated sodium hydroxide solution insoluble.

Standard	Light Fastness	Heat-resistant(℃)		water	Sodium Carbonate(5%)	Hydrochloric acid(5%)
		Melting point	Stable
ISO	Poor	185.5		Well