Uses
C.I. Acid brown 120 is an acidic brown dye that can be adsorbed and removed by bentone clay.
Preparation
3-Aminobenzenesulfonic acid diazo, and the coupling Benzene-1,3-diamine, its product (2 Moore) and double the nitride 2,4-Diaminobenzenesulfonic acid (1 Moore) coupled.
Properties and Applications
red light brown. Soluble in water for yellow light brown. For the strong sulfuric acid in dark brown, diluted into a tan. In water solution to join strong hydrochloric acid with brown precipitation; Add thick sodium hydroxide solution for orange brown.
References
[1] Baskaralingam P, Pulikesi M, Elango D, et al. Adsorption of acid dye onto organobentonite[J]. Journal of hazardous materials, 2006, 128(2-3): 138-144.
