Polydimethylsiloxane (Low Molecular Weight) from Mexico
Low molecular weight polydimethylsiloxane (PDMS) oligomers with defined chain lengths are classified as organo-silicon compounds. Under HTS 2931.90.90.10 when chemically defined and not meeting polymer exclusions, distinguished from Chapter 39 silicones.
Duty Rate — Mexico → United States
3.7%
Rate breakdown
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• Provide molecular weight distribution and degree of polymerization data to prove chemical definition vs polymer status
• Reference Chapter 29 note (a) for impurities tolerance; >90% purity typically qualifies