Morpholine is a colorless, hygroscopic liquid with a weak amine odor, widely used as a chemical intermediate in the synthesis of rubber chemicals, optical brighteners, and pharmaceuticals. Its molecular structure, C4H9NO, makes it a key component in water treatment and as a corrosion inhibitor in steam boiler systems. It's also used in the production of textile and paper processing chemicals. Store in a well-ventilated place and handle with care to prevent exposure.