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Effective Period Rates of Duty Unit of Quantity Article Description Stat. Suf- fix Heading/ Subheading 2 1 Special General Conjugated linoleic acids ((9Z,11E)-9,11-octadecadienoic acid and (10E,12Z)-10,12-octadecadienoic acid) (CAS Nos. 2540-56-9 and 2420-56-6) (provided for in subheading 3823.19.40)................................................................................... 1/ 9902.10.45 On or before 12/31/2020 No change No change Free 1/ Lauryl-cetyl alcohol (alcohol, C12-C16) (CAS No. 68855-56-1) (provided for in subheading 3823.70.40)................................... 1/ 9902.10.46 On or before 12/31/2020 No change No change 0.5% 1/ Mixtures of barium carbonate (CAS No. 513-77-9), strontium carbonate (CAS No. 1633-05-2), calcium carbonate (CAS No. 471-34-1), and 1-methoxy-2-propanyl acetate (CAS No. 108-65-6), of a kind for use as emitter suspension cathode coating (provided for in subheading 3824.90.92) .................... 1/ 9902.10.47 On or before 12/31/2020 No change No change Free 2/ 1/ Mixtures containing 88 percent or more by weight of poly[oxy(dimethylsilanediyl)] bis[omega-butoxypoly(oxypropylene)] ether (CAS No. 67762-96-3), 8 percent or less by weight α-butyl-ω-hydroxylpoly(oxypropylene) (CAS No. 9003-13-8) and less than 4 percent by weight silica dimethylsilylate (CAS No. 68611-44-9) (provided for in subheading 3824.90.92) ..... 1/ 9902.10.48 On or before 12/31/2020 No change No change 0.1% 3/ 1/ Mixtures of 2-amino-2,3-dimethylbutanenitrile (CAS No. 13893-53-3) and toluene (provided for in subheading 3824.99.28)................................................................................... 1/ 9902.10.49 On or before 12/31/2020 No change No change Free 1/ Preparations based on N-(2-ethoxyphenyl)-N'-[4-(10-methylundecyl)phenyl] ethanediamide (CAS No. 82493-14-9) (provided for in subheading 3824.99.28) ............................................................. 1/ 9902.10.50 On or before 12/31/2020 No change No change Free 1/ Mixtures of polymers based on tall oil fatty acids, phthalic anhydride, glycerin and rosin (CAS No. 68015-39-4); poly(isobutyl vinyl ether) (CAS No. 9003-44-5); zinc 2-ethylhexanoate (CAS No. 136-53-8); and more than 50 percent by weight of a hydrocarbon-based solvent (provided for in subheading 3208.10.00) ................................................... 1/ 9902.10.52 On or before 12/31/2020 No change No change Free 1/ Mixtures of methyl esters of C16-C18 and C18 unsaturated fatty acids (CAS No. 67762-38-3) and methyl hexadecanoate (Methyl Palmitate) (CAS No. 112-39-0) (provided for in subheading 3824.99.41) derived from coconut, palm-kernel or palm oil, used other than as a fuel.......................................... 1/ 9902.10.53 On or before 12/31/2020 No change No change Free 1/ N-Propylphosphorothioic triamide (CAS No. 916809-14-8) (provided for in subheading 3824.99.92)................................... 1/ 9902.10.54 On or before 12/31/2020 No change No change Free 1/ Mixtures of sodium salts of iminodisuccinic acid (CAS No. 144538-83-0), whether or not in water (provided for in subheading 3824.99.92).............................................................. 1/ 9902.10.55 On or before 12/31/2020 No change No change Free 1/ 1/ See chapter 99 statistical note 1. 2/ Subheading 3824.90.92 was deleted from the tariff schedule; subheading 3824.99.92 likely covers the product named in this heading. Consult U.S. Customs and Border Protection concerning the use of this duty suspension provision. 3/ Subheading 3824.90.92 was deleted from the tariff schedule; subheading 3824.99.92 likely covers the product named in this heading. Consult U.S. Customs and Border Protection concerning the use of this duty reduction provision. Rates of Duty 1 Harmonized Tariff Schedule of the United States Revision 15 (2026) Annotated for Statistical Reporting Purposes XXII 99 - II - 81 Note:The shaded areas indicate the provision has expired