The 6-Chloropyridazin-3-ol is an organic compound with the formula C₄H₃ClN₂O. The IUPAC name of this chemical is 3-chloro-1H-pyridazin-6-one. With the CAS registry number 19064-67-6, it is also named as 3-Hydroxy-6-chloropyridazine. In addition, the molecular weight is 130.53.

The other characteristics of this product can be summarized as: (1)ACD/LogP: 0.24; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): 0.24; (4)ACD/LogD (pH 7.4): 0.24; (5)ACD/BCF (pH 5.5): 1; (6)ACD/BCF (pH 7.4): 1; (7)ACD/KOC (pH 5.5): 32.09; (8)ACD/KOC (pH 7.4): 31.96; (9)#H bond acceptors: 3; (10)#H bond donors: 1; (11)#Freely Rotating Bonds: 0; (12)Polar Surface Area: 32.67 Å²; (13)Index of Refraction: 1.632; (14)Molar Refractivity: 29.98 cm³; (15)Molar Volume: 84 cm³; (16)Polarizability: 11.88×10^-24 cm³; (17)Surface Tension: 54.1 dyne/cm; (18)Tautomer Count: 2; (19)Exact Mass: 129.99339; (20)MonoIsotopic Mass: 129.99339; (21)Topological Polar Surface Area: 41.5; (22)Heavy Atom Count: 8; (23)Complexity: 173.

Uses of 6-Chloropyridazin-3-ol: It can react with 3-bromo-propionic acid ethyl ester to get 3-(3-chloro-6-oxo-6H-pyridazin-1-yl)-propionic acid ethyl ester. This reaction needs reagent K₂CO₃ and solvent acetone by heating. The reaction time is 24 hours. The yield is 70%.

People can use the following data to convert to the molecule structure. 
1. SMILES:Cl/C1=N/NC(=O)/C=C1
2. InChI:InChI=1/C4H3ClN2O/c5-3-1-2-4(8)7-6-3/h1-2H,(H,7,8)
3. InChIKey:YICPBKWYZXFJNB-UHFFFAOYAJ