Sodium hydroxide, also known as lye and caustic soda, is an inorganic compound. It is a white solid and highly caustic metallic base and alkali of sodium which is available in pellets, flakes, granulesDetails : Formula - NaOH Molar mass - 39.997 g/mol Density - 2.13 g/cm3 Boiling point - 1,388 oC Melting point - 318oC IUPAC ID - Sodium oxidanide, Sodium hydroxide Soluble in - Water, Methanol, Ethanol