Used as a flux in soldering to remove oxides from metal surfaces and improve wetting. Commonly applied in electronics manufacturing and metal joining processes. Also used in adhesives, sealants, and chewing gum as a hardening agent. Found in varnishes, inks, and coatings for its tackifying properties. Employed in paper sizing to improve water resistance. Used in some cosmetics and skincare products for texture and adherence. Also serves as a component in rosin-core solder and in the production of synthetic resins.