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Effective Period Rates of Duty Unit of Quantity Article Description Stat. Suf- fix Heading/ Subheading 2 1 Special General Himic anhydride (1,2,3,6-tetrahydro-3,6-methanophthalic anhydride) (CAS No. 826-62-0) (provided for in subheading 2917.20.00)................................................................................... 1/ 9902.02.96 On or before 12/31/2020 No change No change Free 1/ Potassium 1,3-dioxo-1H,3H-benzo[de]isochromene-6-sulfonate (CAS No. 71501-16-1) (provided in subheading 2917.39.04)................................................................................... 1/ 9902.02.97 On or before 12/31/2020 No change No change Free 1/ 5,5'-Bi-2-benzofuran-1,1',3,3'-tetrone (CAS No. 2420-87-3) (provided for in subheading 2917.39.30)................................... 1/ 9902.02.99 On or before 12/31/2020 No change No change Free 1/ Naphthalene-1,8:4,5-tetracarboxylic dianhydride (CAS No. 81-30-1) (provided for in subheading 2917.39.70)................... 1/ 9902.03.01 On or before 12/31/2020 No change No change Free 1/ Pyromellitic dianhydride (benzene-1,2:4,5-tetracarboxylic dianhydride) (CAS No. 89-32-7) (provided for in subheading 2917.39.70)................................................................................... 1/ 9902.03.02 On or before 12/31/2020 No change No change Free 1/ Dimethyl 5-nitroisophthalate (CAS No. 13290-96-5) (provided for in subheading 2917.39.70).................................................... 1/ 9902.03.03 On or before 12/31/2020 No change No change Free 1/ Isophthaloyl chloride (CAS No. 99-63-8) (provided for in subheading 2917.39.70).............................................................. 1/ 9902.03.04 On or before 12/31/2020 No change No change Free 1/ Terephthaloyl chloride (CAS No. 100-20-9) (provided for in subheading 2917.39.70).............................................................. 1/ 9902.03.05 On or before 12/31/2020 No change No change Free 1/ 3-Hydroxy-2,2-dimethylpropyl-3-hydroxy-2,2-dimethylpropionate (CAS No. 1115-20-4) (provided for in subheading 2918.19.90)................................................................................... 1/ 9902.03.06 On or before 12/31/2020 No change No change Free 1/ o-Acetylsalicylic acid (Aspirin) (CAS No. 50-78-2) (provided for in subheading 2918.22.10).................................................... 1/ 9902.03.07 On or before 12/31/2020 No change No change 1.9% 1/ Methyl salicylate (CAS No. 119-36-8) (provided for in subheading 2918.23.20).............................................................. 1/ 9902.03.08 On or before 12/31/2020 No change No change 2.3% 1/ 4-Hydroxybenzoic acid (CAS No. 99-96-7) (provided for in subheading 2918.29.22).............................................................. 1/ 9902.03.09 On or before 12/31/2020 No change No change 2.0% 1/ 3,4,5-Trihydroxybenzoic acid monohydrate (Gallic acid monohydrate) (CAS No. 5995-86-8) (provided for in subheading 2918.29.30).............................................................. 1/ 9902.03.10 On or before 12/31/2020 No change No change Free 1/ C7-C9-Alkyl 3-(3,5-di-trans-butyl-4-hydroxyphenyl) propionate (CAS No. 125643-61-0) (provided in subheading 2918.29.65)................................................................................... 1/ 9902.03.11 On or before 12/31/2020 No change No change Free 1/ Propyl 3,4,5-trihydroxybenzoate (Propyl gallate) (CAS No. 121-79-9) (provided for in subheading 2918.29.75)................ 1/ 9902.03.12 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 - 15 Note:The shaded areas indicate the provision has expired