5-氯-2-[(2-羟基-1-萘基)偶氮]-4-甲基苯磺酸
2-chloro-5-[(2-hydroxy-1-naphthyl)azo]toluene-4-sulphonic acid
2-chloro-5-[(2-hydroxy-1-naphthyl)azo]toluene-4-sulphonic acid;D.C. Red No. 9;5-chloro-2-[(2-hydroxy-1-naphthalenyl)azo]-4-methyl-Benzenesulfonic acid;Pigment red 53 (C.I. 15585);2-(2-Hydroxy-1-naphtylazo)-4-methyl-5-chlorobenzenesulfonic acid;5-Chloro-2-(2-hydroxy-1-naphtylazo)-4-methylbenzenesulfonic acid;R-204;2092-56-0 (Mono-hydrochloride salt)