7-Hydroxyquinolin-2(1H)-one is known to have chemical formula C9H7NO2 with molecular weight of 161.16 g/mol. It shows ability to donate & accept 2 hydrogen bonds during a chemical reaction. This compound is a pharmaceutical intermediate which serves as substituted carbostyril derivative. It shows slight solubility in DMSO & methanol when heated and has melting point of about 254 degrees Celsius. 7-Hydroxyquinolin-2(1H)-one appears as off-white to pale orange colored solid and should be stored in refrigerator for maintaining its shelf life.