Sulfuric Acid & Oleum

Sulfuric acid and its fuming form, oleum, are among the highest-volume industrial chemicals in global trade, serving as essential inputs for fertilizer production, petroleum refining, metal leaching, and chemical synthesis. Both products are classified under a single 10-digit line (2807000000). Canada and Mexico are the leading US suppliers, consistent with the heavy industrial integration across North American borders, with Taiwan, Spain, and Japan also contributing. DOT hazardous-materials regulations govern transport, and importers handling oleum (which contains free sulfur trioxide) face additional containment requirements beyond those for standard sulfuric acid.