Coated Calcium Carbonate Stearic Acid from Mexico
Calcium carbonate particles surface-treated with stearic acid for hydrophobic properties, still classified as base compound under HTS 2836.50.00.00 if coating <5%. Used in polyolefin films and sheets.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Quantify coating percentage via TGA analysis (<5% maintains compound status)
• Test for dispersion quality in LLDPE matrix per ASTM standards
• Declare organic coating components separately on entry documents