Used as a key intermediate in the synthesis of anticoagulant drugs, particularly warfarin and other 4-hydroxycoumarin derivatives that inhibit vitamin K epoxide reductase, thus preventing blood clotting. Commonly employed in rodenticides due to its ability to cause internal bleeding in pests. Also serves as a building block in organic synthesis for fluorescent dyes and optical brighteners. Investigated for potential anti-inflammatory, antimicrobial, and anticancer properties in pharmaceutical research. Found in some natural products and used in studies related to antioxidant activity.