Pyridazines (C4H4N2) are organoheterocyclic compounds that consist of an aromatic six-membered ring containing two adjacent nitrogen atoms and four carbon atoms. It is isomeric with pyrimidine and pyrazine.
Chemical Name or Material: 3-Aminophthalhydrazide. CAS: 521-31-3. Health Hazard 1: H315-H319-H335. Health Hazard 2: GHS H Statement H302-H315-H319-H335 Harmful if swallowed. Causes skin irritation. Causes serious eye irritation. May cause respiratory irritation.