The IUPAC name of 4-Chloro-5-methoxypyridazin-3(2H)-one is 5-chloro-4-methoxy-1H-pyridazin-6-one . With the CAS registry number 63910-43-0, it is also named as 3(2H)-pyridazinone, 4-chloro-5-methoxy- ; 4-Chloro-5-methoxypyridazin-3(2H)-one ; 4-chloro-5-methoxy-3(2H)-pyridazinone . This product's poduct categories are pyrazines and pyrimidines & pyridazines. It is a chemical intermediate. So it can be used in organic synthesis. People can use the following data to convert to the molecule structure. SMILES:Cl\C1=C(/OC)\C=N/NC1=O, InChI: InChI=1/C5H5ClN2O2/c1-10-3-2-7-8-5(9)4(3)6/h2H,1H3,(H,8,9), InChIKey: SUZFURZANOKZBL-UHFFFAOYAH, Std. InChI: InChI=1S/C5H5ClN2O2/c1-10-3-2-7-8-5(9)4(3)6/h2H,1H3,(H,8,9), Std. InChIKey: SUZFURZANOKZBL-UHFFFAOYSA-N. 4-Chloro-5-methoxypyridazin-3(2H)-one has market in China and many companies supply this product.