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Effective Period Rates of Duty Unit of Quantity Article Description Stat. Suf- fix Heading/ Subheading 2 1 Special General Mixtures of N,N'-1,2-ethanediylbis(N-acetylacetamide) with organic binders (CAS No. 10543-57-4) (provided for in subheading 3824.99.92).............................................................. 1/ 9902.10.56 On or before 12/31/2020 No change No change Free 1/ Mixtures of C5-C18 perfluorocarbon alkanes, perfluorocarbon amines, and/or perfluorocarbon ethers (CAS No. 86508-42-1) (provided for in subheading 3824.99.92) .................................. 1/ 9902.10.57 On or before 12/31/2020 No change No change Free 1/ Mixtures of 2-methyl-N-[2-(2-oxoimidazolidin-1-yl)ethyl]prop-2-enamide (CAS No. 3089-19-8), 2-methylprop-2-enoic acid (CAS No. 79-41-4), 1-(2-aminoethyl)imidazolidin-2-one (CAS No. 6281-42-1) and benzene-1,4-diol (CAS No. 123-31-9) (provided for in subheading 3824.99.92)................................... 1/ 9902.10.58 On or before 12/31/2020 No change No change Free 1/ Amorphous synthetic silica gel, silanized (CAS No. 112926-00-8) (provided for in subheading 3824.99.92).......... 1/ 9902.10.59 On or before 12/31/2020 No change No change Free 1/ Sodium ethylate (sodium ethanolate) (CAS No. 141-52-6), solution in ethanol (CAS No. 64-17-5) (provided for in subheading 3824.99.92) ............................................................. 1/ 9902.10.60 On or before 12/31/2020 No change No change Free 1/ Siloxanes and silicones, di-Me, polymers with Me silsesquioxanes and polypropylene glycol mono-Bu ether (CAS No. 68554-65-4), greater than 70 percent by weight, with less than 8 percent percent by weight siloxanes and silicones, di-Me, polymers with Me silsesquioxanes and polyethylene-polypropylene glycol mono-Bu ether, less than 8 percent by weight poly(oxy(methyl-1,2-ethanediyl)), α-butyl-ω hydroxyl (CAS No. 9003-13-8), less than 2 percent by weight oxirane, methyl-, polymer with oxirane, monobutylether (CAS No. 9038-95-3), less than 8 percent by weight silanamine, 1,1,1, trimethyl (CAS No. 68909-20-6) and less than 1 percent by weight silicon dioxide (CAS No. 7631-86-9) (provided for in subheading 3824.99.92).......................................................... 1/ 9902.10.61 On or before 12/31/2020 No change No change Free 1/ 1-O-Stearoyl-β-D-fructofuranosyl α-D-glucopyranoside (Sucrose stearate) (CAS No. 25168-73-4) (provided for in subheading 3824.99.92).............................................................. 1/ 9902.10.62 On or before 12/31/2020 No change No change Free 1/ Acid washed beta zeolite powder composed of mixtures of aluminum, silicon and sodium oxides, tetraethylammonium-hydroxide, and organic compounds (CAS No. 1318-02-1) (provided for in subheading 3824.99.92)....... 1/ 9902.10.63 On or before 12/31/2020 No change No change Free 1/ 2-Propenoic acid, C12-C14-alkyl esters, telomers with ethylene, 2-ethylhexyl acrylate, propanal and vinyl acetate (CAS No. 923958-45-6) (provided for in subheading 3901.90.90)................................................................................... 1/ 9902.10.64 On or before 12/31/2020 No change No change Free 1/ Polypropylene in pellet form, containing 18 percent or more but not over 22 percent by weight of mineral filler (talc) (CAS No. 9003-07-0) (provided for in subheading 3902.10.00)....... 1/ 9902.10.65 On or before 12/31/2020 No change No change Free 1/ 1/ See chapter 99 statistical note 1. Rates of Duty 1 Harmonized Tariff Schedule of the United States Revision 15 (2026) Annotated for Statistical Reporting Purposes XXII 99 - II - 82 Note:The shaded areas indicate the provision has expired