CAS NO. 51359-15-0 | 1,2-Dihydro-4-[(2-hydroxynaphthalen-1-yl)azo]-1,5-dimethyl-2-phenyl-3H-pyrazol-3-one |

1,2-Dihydro-4-[(2-hydroxynaphthalen-1-yl)azo]-1,5-dimethyl-2-phenyl-3H-pyrazol-3-one

Antipyrylazo-Î²-naphthol	4-(2-Hydroxy-1-naphthylazo)antipyrine
1,2-Dihydro-4-[(2-hydroxynaphthalen-1-yl)azo]-1,5-dimethyl-2-phenyl-3H-pyrazol-3-one