Petroleum resins, coumarone-indene resins, polyterpenes, polysulfides, polysulfones and other products specified in note 3 to this chapter, not elsewhere specified or included, in primary forms

Every line of heading 3911

• 3911 Petroleum resins, coumarone-indene resins, polyterpenes, polysulfides, polysulfones and other products specified in note 3 to this chapter, not elsewhere specified or included, in primary forms.
• 3911.10.00.00 Petroleum resins, coumarone, indene or coumarone-indene resins; polyterpenes (kg): General 6.1%; Special Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 15.4¢/kg + 49%.
• 3911.20.00.00 Poly(1,3-phenylene methylphosphonate) (kg): General 6.5%; Special Free (A, AU, BH, CL, CO, D, E, IL, JO, K, KR, MA, OM, P,PA, PE, S, SG); Column 2 2.2¢/kg + 33.5%.
• 3911.90 Other (under: Petroleum resins, coumarone-indene resins, polyterpenes, polysulfides, polysulfones and other products specified in note 3 to this chapter, not elsewhere specified or included, in primary forms).
• 3911.90.10.00 Elastomeric (under: Other) (kg): General Free; Special none; Column 2 20%.
• 3911.90.15.00 Poly(nitrilomethanetetraarylnitrilo- [2,4,6-tris-(1-methyethyl)-1,3- phenylene]]-2,6-bis(1-methylethyl)- phenyl]-ω-[[[2,6-bis(1-methylethyl)- phenyl]amino]methylene]amino carbodiimide or 2,4-diisocyanate-1,3,5-tris(1-methyl- ethyl) homopolymer with polyethylene (kg): General Free; Special none; Column 2 15.4¢/kg + 49%.
• 3911.90.25.00 Other (under: Thermoplastic) (kg): General 6.1%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG); Column 2 15.4¢/kg + 49%.
• 3911.90.35.00 1,1'-Bis(methylenedi-4,1-phenylene)- 1H-pyrrole-2,5-dione, copolymer with 4,4'-methylenebis(benzeneamine); and Hydrocarbon novolac cyanate ester (kg): General Free; Special none; Column 2 15.4¢/kg + 45%.
• 3911.90.45.00 Other (under: Thermosetting) (kg): General 5.8%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG); Column 2 15.4¢/kg + 45%.
• 3911.90.70.00 Chlorinated synthetic rubber (under: Other) (kg): General Free; Special none; Column 2 2.2¢/kg + 33.5%.
• 3911.90.91 Other (under: Other): General 6.5%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG); Column 2 2.2¢/kg + 33.5%.
• 3911.90.91.10 Thermoplastic (under: Other) (kg).
• 3911.90.91.50 Thermosetting (under: Other) (kg).

About these rates

The rates are those printed in the 2026 HTS Revision 23, published by the U.S. International Trade Commission. A 10-digit statistical line takes the rates printed on the 8-digit line above it. Chapter 99 duties (Section 232, Section 301, IEEPA) depend on the product, the origin and the date, are charged on top, and are not included. A code here is a strong lead, not a ruling: confirm it with a customs broker or a CBP binding ruling.