Acid yellow ER

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 ; ; Benzenesulfonic acid,4-[4,5-dihydro-3-methyl-4-[2-[4-methyl-3-[(phenylamino)sulfonyl]phenyl]diazenyl]-5-oxo-1H-pyrazol-1-yl]-,sodium salt (1:1)