Acid Orange 67 Acid Orange 67 4-[[4-[[2-Methyl-4-[[(4-methylphenyl)sulfonyl]oxy]phenyl]azo]phenyl]amino]-3-nitrobenzenesulfonic acid sodium salt C.I.14172 Orange 67 Weak Acid orange RL sodium 4-[4-[[2-methyl-4-[[(p-tolyl)sulphonyl]oxy]phenyl]azo]anilino]-3-nitrobenzenesulphonate AcidOrange3R