Chemistry is traditionally divided into organic and inorganic chemistry. SDS of cas: 1120-95-2, The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent，Which mentioned a new discovery about 1120-95-2
Novel 5,6-bis-(4-substitutedphenyl)-2H(3)-pyridazinones: Synthesis and reactions
A series of 5,6-bis(4-substitutedphenyl)-2H(3)-pyridazinones 2a-f have been synthesized from the condensation of the corresponding benzil monohydrazones 1 either with ethyl cyanoacetate or diethyl malonate in ethanol. The synthesized pyridazinones were converted to the corresponding 3-chloro derivatives 3a-f by the action of phosphoryl chloride. Reaction of the latter halogenated pyridazines with various aromatic amines led to the formation of new 3-aminoaryl pyridazines (4) in moderate yield. The structures of all new compounds 2b,c,e,f, 3b-e, 4 were fully identified by the analysis of their 1H and 13C NMR and mass spectra. Some of these synthetic heterocyclic compounds were screened for their antimicrobial activities but they were almost negative.
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Reference：
Pyridazine – Wikipedia,
Pyridazine | C4H4N408 – PubChem