1563-01-5 3-[[4-(Diethylamino)-2-hydroxyphenyl]azo]-4-hydroxybenzenesulfonic acid 5-Sulfo-4'-(diethylamino)-2,2'-dihydroxyazobenzene Benzenesulfonic acid, 3-[[4-(diethylamino)-2-hydroxyphenyl]azo]-4-hydroxy- NSC96926 WLN: WSQR DQ CNUNR BQ DN2&2