Gypsum Board Dispersant Lignosulfonate from Mexico
Low-viscosity ammonium lignosulfonate solution optimized for gypsum slurry flow in wallboard manufacturing. Derives from concentrated, desugared softwood pulp lyes qualifying for HTS 3804.00.5000.
Duty Rate — Mexico → United States
13.7%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Import Tips
• Construction chemical importers need ASTM performance specs
• Shelf-life testing prevents rejection of aged product
• Multiple suppliers; verify consistent sulfonation degree