Benzenesulfonicacid,4-[4,5-dihydro-3-methyl-4-[[4-methyl-3-[(phenylamino)sulfonyl]phenyl]azo]-5-oxo-1H-pyrazol-1-yl]-,monosodium salt (9CI);C.I. Acid Yellow 25 (7CI);C.I. Acid Yellow 25,monosodium salt (8CI);Acid Fast Yellow R;Acid Fast Yellow WR;Acid Yellow R;Acid Yellow RN;Acid yellow 25;Acidine Fast Yellow R;Amido Fast Yellow R;Apollo Nylon Fast Yellow L-RPL;Aquamine Yellow RN;Belacid Yellow R;C.I.18835;Covanyl Yellow RN;Cyanine Fast Yellow R;Daedo Acid Yellow C-RPL;Diacid Fast Yellow R;Dyacid Yellow RPN;Egacid Yellow R;Erio Fast Yellow RS;Erionyl Yellow E-RL;Euramina Yellow R;Fast Yellow MR;Fenazo Light Yellow R;Kiton Fast Yellow 2R;Lanaperl Yellow R;Midlon Yellow R;Multacid Yellow R;NSC 324572;Novamina Yellow R;Nylosan Yellow E-RPL;Optamine Yellow R;OxanalYellow R;Rifa Acid Fast Yellow E-RPL;Suminol Fast Yellow R;Sumitomo FastYellow R;Supracetil Yellow R;Supracid Yellow R;Supramine Yellow R;SupramineYellow RA;Tertracid Yellow R;Triacid Fast Yellow R;Vicoacid Yellow 25;Vondacid Fast Yellow R;Xylene Fast Yellow RPN;p-[5-Hydroxy-3-methyl-4-[[3-(phenylsulfamoyl)-p-tolyl]azo]pyrazol-1-yl]benzenesulfonicacid monosodium salt;