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Effective Period Rates of Duty Unit of Quantity Article Description Stat. Suf- fix Heading/ Subheading 2 1 Special General Mixed xylidines (CAS No. 1300-73-8) (provided for in subheading 2921.49.45).............................................................. 1/ 9902.03.75 On or before 12/31/2020 No change No change Free 1/ Dodecylaniline branched isomers (CAS No. 68411-48-3) (provided for in subheading 2921.49.45)................................... 1/ 9902.03.76 On or before 12/31/2020 No change No change Free 1/ N-(2-Chloro-6-fluorobenzyl)-N-ethyl-α,α,α-trifluoro- 2,6-dinitro-p-toluidine (Flumetralin) (CAS No. 62924-70-3) (provided for in subheading 2921.49.45)................................... 1/ 9902.03.77 On or before 12/31/2020 No change No change Free 1/ (1S)-1-Phenylethanamine (CAS No. 618-36-0) (provided for in subheading 2921.49.50).......................................................... 1/ 9902.03.78 On or before 12/31/2020 No change No change Free 1/ 2-Ethyl-6-methylaniline (CAS No. 24549-06-2) (provided for in subheading 2921.49.50).......................................................... 1/ 9902.03.79 On or before 12/31/2020 No change No change Free 1/ m-Phenylenediamine (CAS No. 108-45-2) (provided for in subheading 2921.51.10) 2/............................................................ 1/ 9902.03.80 On or before 12/31/2020 No change No change Free 1/ 1,3-Benzenediamine (CAS No. 108-45-2) (provided for in subheading 2921.51.10) 3/............................................................ 1/ 9902.03.81 On or before 12/31/2020 No change No change 4.0% 1/ N-Phenyl-p-phenylenediamine (CAS No. 101-54-2) (provided for in subheading 2921.51.50).................................................... 1/ 9902.03.82 On or before 12/31/2020 No change No change 4.6% 1/ 4,4' Methylenebis(2-chloroaniline) (CAS No. 101-14-4) (provided for in subheading 2921.59.08)................................... 1/ 9902.03.83 On or before 12/31/2020 No change No change Free 1/ 4,4'-Diamino-2,2'-stilbenedisulfonic acid (CAS No. 81-11-8) (provided for in subheading 2921.59.20)................................... 1/ 9902.03.84 On or before 12/31/2020 No change No change 1.5% 1/ 2,2'-Bis(trifluoromethyl)-4,4'-biphenyldiamine (CAS No. 341-58-2) (provided for in subheading 2921.59.40)................ 1/ 9902.03.85 On or before 12/31/2020 No change No change Free 1/ 2,2'-[[(1S,2S)-1,2-Diphenyl-1,2-ethanediyl]bis(im- inomethylene)]bis[6-(1,1-dimethylethylphenol] (CAS No. 481725-63-7) (provided for in subheading 2921.59.40) ......... 1/ 9902.03.86 On or before 12/31/2020 No change No change Free 1/ 2,6-Dinitro-N,N-dipropyl-4-(trifluoromethyl)-1,3-benzenediamine (Prodiamine) (CAS No. 29091-21-2) (provided for in subheading 2921.59.80).............................................................. 1/ 9902.03.87 On or before 12/31/2020 No change No change 1.6% 1/ 3,3'-Dichlorobenzidine dihydrochloride (3,3'-Dichloro-4,4'-biphenyldiamine dihydrochloride) (CAS No. 612-83-9) (provided for in subheading 2921.59.80)................ 1/ 9902.03.88 On or before 12/31/2020 No change No change Free 1/ 1/ See chapter 99 statistical note 1. 2/ Note that this provision and heading 9902.03.81 refer to products with the same CAS registry number. It is suggested that importers choose the heading that matches their shipment's invoice description, and consult U.S. Customs and Border Protection with any questions that arise. 3/ Note that this provision and heading 9902.03.80 refer to products with the same CAS registry number. It is suggested that importers choose the heading that matches their shipment's invoice description, and consult U.S. Customs and Border Protection with any questions that arise. Rates of Duty 1 Harmonized Tariff Schedule of the United States Revision 15 (2026) Annotated for Statistical Reporting Purposes XXII 99 - II - 20 Note:The shaded areas indicate the provision has expired