C.I.11290;Chromol Brown M;Einecs 228-855-7;Mordant Brown 12;Monochrome Brown H;Metachrome Brown R;Eriochrome Brown BR;C.I.Mordant Brown 12;C.I.Mordant Brown 12:C.I.11290;2-[(2,4-diaminophenyl)azo]-4,6-dinitrophenol
2-Amino-4,6-dinitrophenol diazotization, and Benzene-1,3-diamine coupling.
Properties and Applications
dark red light brown. Soluble in hot water for orange red, soluble in ethanol for red light brown. In concentrated sulfuric acid for brown, dilute almost unchanged; In concentrated nitric acid for brown solution, dilution after amber solution. Dye aqueous solution to join concentrated hydrochloric acid for amber solution; Join concentrated sodium hydroxide solution for brown.