Sulfuric Acid Oleum from Canada
Oleum, or fuming sulfuric acid (H2SO4 + SO3), is a highly corrosive liquid used in sulfonation processes. It falls under HTS 2811.19.61 as an other inorganic acid of nonmetals, distinct from standard sulfuric acid in 2807. This classification applies to its concentrated, oxygen-rich form per Chapter 28.
Duty Rate — Canada → United States
14.2%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Use glass-lined or PTFE-lined containers to prevent reaction during shipping
• Declare exact SO3 content for correct subheading; >20% shifts classification
• Comply with TSCA import certification for new chemical substances