Polydimethylsiloxane (PDMS) Fluid from China
Polydimethylsiloxane (PDMS) is a clear, viscous silicone polymer fluid used in lubricants, cosmetics, and as a release agent. It falls under HTS 3910.00.00.00 as a silicone in primary form, where the siloxane monomer units constitute 95% or more by weight of the polymer content per chapter notes.
Duty Rate — China → United States
38%
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
9903.88.0225%Except as provided in headings 9903.88.12, 9903.88.17, 9903.88.20, 9903.88.54, 9903.88.59, 9903.88.61, 9903.88.63, 9903.88.66, 9903.88.67, 9903.88.68, 9903.88.69, or 9903.88.70, articles the product of China, as provided for in U.S. note 20(c) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(d)
Import Tips
• Verify monomer composition via supplier certificates to confirm 95% siloxane content for Chapter 39 classification
• Ensure SDS sheets detail primary form status to avoid misclassification as compounded products
• Check for REACH compliance if sourcing from EU for silicone fluids