1563-01-5 3-(4-Diethylamino-2-hydroxyphenylazo)-4-hydroxybenzenesulfonic acid 5-Sulfo-4'-(diethylamino)-2,2'-dihydroxyazobenzene BRN 0708561 Benzenesulfonic acid, 3- 4-(diethylamino)-2-hydroxyphenyl azo -4-hydroxy- Benzenesulfonic acid, 3-((4-(diethylamino)-2-hydroxyphenyl)azo)-4-hydroxy- NSC 96926