35772-90-8 4692-37-9 6359-82-6 77107-21-2 98249-01-5 ACID YELLOW 11, SODIUM SALT Acid yellow 11 Benzenesulfonic acid, 4-(4,5-dihydro-3-methyl-5-oxo-4-(phenylazo)-1H-pyrazol-1-yl), sodium salt Benzenesulfonic acid, 4-(4,5-dihydro-3-methyl-5-oxo-4-(phenylazo)-1H-pyrazol-1-yl)-, sodium salt C.I. Acid Yellow 11, sodium salt CI 18820 EINECS 228-808-0 Sodium 4-(3-hydroxy-5-methyl-4-phenylazopyrazol-2-yl)benzenesulphonate Sodium 4-(4,5-dihydro-3-methyl-5-oxo-4-(phenylazo)-1H-pyrazol-1-yl)benze- nesulfonate