Novak, V. et al. published their research in Plaste und Kautschuk in 1965 | CAS: 5754-18-7

1,2-Dihydro-4-methyl-3,6-pyridazinedione (cas: 5754-18-7) belongs to pyridazine derivatives. Pyridazines are rare in nature, possibly reflecting the scarcity of naturally occurring hydrazines, common building blocks for the synthesis of these heterocycles. In the past decade, X-ray data were reported with regard to the characterization and structural elucidation of a number of pyridazine-metal complexes, including pyridazine ligands with zinc, nickel, copper, cadmium and ruthenium.Electric Literature of C5H6N2O2

Determination of some acids in alkyds and polyesters by classical and oscillographic polarography with a vibrating dropping-mercury electrode was written by Novak, V.. And the article was included in Plaste und Kautschuk in 1965.Electric Literature of C5H6N2O2 This article mentions the following:

An efficient method is described whereby vibrations from a loudspeaker cone are transmitted through a metal rod to a dropping Hg capillary connected by a rubber ring. The method permits simultaneous determination of maleic (I), fumriac (II), and phthalic (III), or of citraconic (IV), mesaconic (V), and III acids in hydrolyzates of polyesters or alkyds. In 0.04M HCl with 0.5M NH4Cl, I and II are undissociated and have the same half-wave potential (E0.5), giving their sum, followed at a distance by the cation of III. In the same medium, IV, V, and III show up sep. I and II are separated in buffers of pH 6.8-7.5, where I anion is readily reduced (-1.46 v.). Between 1 and 5 ml. product from resin, hydrolyzed in Me2CO by aqueous KOH, 12.5 ml. M NH4Cl, 1 ml. M HCl, and H2O to fill a 25-ml. flask was polarographed against a S.C.E., starting at -0.4 v.; E0.5 were -0.65 v. for I and II, -0.53 for IV, -0.65 for V, and -1.05 for III. The oscillographic determination in the presence of vibrations was greatly improved by insertion of a Ge diode in the circuit. I and II were best determined in a 9:1 mixture of M NH4Cl and M HCl; IV and V by a 3:1 mixture of the same. Accuracy of the methods is discussed. In the experiment, the researchers used many compounds, for example, 1,2-Dihydro-4-methyl-3,6-pyridazinedione (cas: 5754-18-7Electric Literature of C5H6N2O2).

1,2-Dihydro-4-methyl-3,6-pyridazinedione (cas: 5754-18-7) belongs to pyridazine derivatives. Pyridazines are rare in nature, possibly reflecting the scarcity of naturally occurring hydrazines, common building blocks for the synthesis of these heterocycles. In the past decade, X-ray data were reported with regard to the characterization and structural elucidation of a number of pyridazine-metal complexes, including pyridazine ligands with zinc, nickel, copper, cadmium and ruthenium.Electric Literature of C5H6N2O2

Referemce:
Pyridazine – Wikipedia,
Pyridazine | C4H4N2 – PubChem