The Union Carbide Corporation (UCC) stands as a defining force of 20th-century industrial innovation. From its foundational role in petrochemical manufacturing to its wartime contributions and postwar consumer product dominance, UCC's operations epitomized the technological ambition and societal impact of the industrial golden age. This article examines how its breakthroughs reshaped global industries, supported geopolitical ambitions, and left a complex legacy of progress and peril.