Einecs 229-926-5

1-(4,8-Disulfonaphthalen-2-yl)-3-methyl-1H-pyrazol-5(4H)-one

3-(3-methyl-5-oxo-2H-pyrazol-1(5H)-yl)naphthalene-1,5-disulfonic acid

1,5-Naphthalenedisulfonic acid, 3-(4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl)-