1H-Indazolin-3-one, 6-amino-, dihydrochloride 3H-Indazol-3-one, 6-amino-1,2-dihydro-, dihydrochloride (9CI) 55207-49-3 6-Amino-1H,2H-indazol-3-one 6-Amino-3-indazolinone dihydrochloride EINECS 259-536-0 NSC 87551