Dull yellow-brown, transparent pigment created when precipitated on an inert base from crystallized orange-brown needles made from a dilute glacial acetic acid solution. Developed in 1887 by R. Nietzki, it became the first azo mordant dye. (en)
Pigmento amarillo amarronado, opaco y translúcido. (es)
Een dof, bruinachtig, doorschijnend geel pigment. (nl)