Benzenesulfonicacid, 4-[[4-(diethylamino)phenyl]azo]-, sodium salt (9CI);Benzenesulfonicacid, p-[[p-(diethylamino)phenyl]azo]-, sodium salt (7CI);Ethyl orange sodiumsalt;Sodium 4-[[4-(diethylamino)phenyl]azo]benzenesulfonate;
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