Lignin Sulfonate Concrete Dispersant from Mexico
This concentrated sodium-based lignin sulfonate acts as a high-range water reducer in ready-mix concrete, directly derived from black liquor of sulfite pulp mills. It qualifies for HTS 3804.00.5000 as a wood pulp manufacturing residual lye, chemically treated but retaining base composition.
Duty Rate — Mexico → United States
13.7%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Submit assay reports confirming >90% lignin sulfonates to prevent reclassification
• EPA may require pre-manufacture notice under TSCA for first imports
• Avoid bulk packaging confusion with similar synthetic superplasticizers