The 2(1H)-Pyridinone,4-amino-3-chloro-, with the CAS registry number 55290-73-8, has the systematic name of 4-amino-3-chloropyridin-2(1H)-one. It belongs to the product category of Pyridines. And the molecular formula of the chemical is C₅H₅ClN₂O.

The characteristics of 2(1H)-Pyridinone,4-amino-3-chloro- are as followings: (1)# of Rule of 5 Violations: 0; (2)ACD/BCF (pH 5.5): 1; (3)ACD/BCF (pH 7.4): 1; (4)ACD/KOC (pH 5.5): 6.33; (5)ACD/KOC (pH 7.4): 6.33; (6)#H bond acceptors: 3; (7)#H bond donors: 3; (8)#Freely Rotating Bonds: 1; (9)Polar Surface Area: 55.12 Å²; (10)Index of Refraction: 1.615; (11)Molar Refractivity: 34.73 cm³; (12)Molar Volume: 99.4 cm³; (13)Polarizability: 13.77×10^-24cm³; (14)Surface Tension: 54.7 dyne/cm; (15)Density: 1.45 g/cm³; (16)Flash Point: 116.8 °C; (17)Enthalpy of Vaporization: 50.76 kJ/mol; (18)Boiling Point: 269.4 °C at 760 mmHg; (19)Vapour Pressure: 0.00725 mmHg at 25°C. 

Addtionally, the following datas could be converted into the molecular structure:
(1)SMILES: NC=1\C=C/NC(=O)C=1Cl
(2)InChI: InChI=1/C5H5ClN2O/c6-4-3(7)1-2-8-5(4)9/h1-2H,(H3,7,8,9)
(3)InChIKey: NZLGHNWBBDTVDK-UHFFFAOYAK