Benzenesulfonicacid, 4-[(4-hydroxy-1-naphthalenyl)azo]-, monosodium salt (9CI);C.I. Acid Orange 20 (7CI);C.I. Acid Orange 20, monosodium salt (8CI);1333 Orange;4-p-Sulfophenylazo-1-naphthol monosodium salt;A.F. Orange No. 1;Acid LeatherOrange I;Sodium 4-[(4-hydroxy-1-naphthyl)diazenyl]benzenesulfonate;4-(4-Hydroxy-1-naphthylazo)benzenesulfonic acid sodium salt;Aizen Orange I;C.I. 14600;Certiqual OrangeI;Dye orange No. 1;Eniacid Orange I;Ext D and COrange No. 3;External D and C Orange Number 3;FD and C Orange 1;FD and COrange No. 1;Hispacid Orange 1;Japan Orange 1;Japan Orange 402;Japan OrangeNo. 402;Java Orange I;Naphthalene Orange I;Naphthol Orange;Neklacid Orange1;Orange 1 sodium salt;Orange 402;Orange I;Orange I Extra Conc. A Export;Orange IM;Orange No. 402;Tertracid Orange I;Tropaeolin 1;Yellow 404;a-NaphtholOrange;