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Effective Period Rates of Duty Unit of Quantity Article Description Stat. Suf- fix Heading/ Subheading 2 1 Special General Hydroxylamine sulfate (bis(hydroxylammonium) sulfate) (CAS No. 10039-54-0) (provided for in subheading 2825.10.00)...... 1/ 9902.01.37 On or before 12/31/2020 No change No change Free 1/ Hydrazine, 64 percent solution in water (CAS No. 302-01-2) (provided for in subheading 2825.10.00) .................................. 1/ 9902.01.38 On or before 12/31/2020 No change No change Free 1/ Germanium dioxide, powder form (CAS No. 1310-53-8) (provided for in subheading 2825.60.00)................................... 1/ 9902.01.39 On or before 12/31/2020 No change No change Free 1/ Tin(IV) oxide (stannic oxide) (Dioxostannane) (CAS No. 18282-10-5) (provided for in subheading 2825.90.20)............ 1/ 9902.01.40 On or before 12/31/2020 No change No change Free 1/ Ammonium bifluoride (Ammonium fluoride hydrofluoride (1:1:1)) (CAS No. 1341-49-7) (provided for in subheading 2826.19.10)................................................................................... 1/ 9902.01.41 On or before 12/31/2020 No change No change Free 1/ Sodium Fluoride (CAS No. 7681-49-4) (provided for in subheading 2826.19.20).............................................................. 1/ 9902.01.42 On or before 12/31/2020 No change No change Free 1/ Tin fluoride (CAS No. 7783-47-3) (provided for in subheading 2826.19.90)................................................................................... 1/ 9902.01.43 On or before 12/31/2020 No change No change Free 1/ Sodium hydrogen difluoride (CAS No. 1333-83-1) (provided for in subheading 2826.19.90).................................................... 1/ 9902.01.44 On or before 12/31/2020 No change No change Free 1/ Chromium(3+) trifluoride (CAS No. 7788-97-8) (provided for in subheading 2826.19.90).......................................................... 1/ 9902.01.45 On or before 12/31/2020 No change No change Free 1/ Potassium fluoride hydrofluoride (CAS No. 7789-29-9) (provided for in subheading 2826.19.90)................................... 1/ 9902.01.46 On or before 12/31/2020 No change No change Free 1/ Potassium fluoroborate (CAS No. 14075-53-7) (provided for in subheading 2826.90.90).......................................................... 1/ 9902.01.47 On or before 12/31/2020 No change No change Free 1/ Potassium fluotitanate (Dipotassium hexafluorotitanate(2-)) (CAS No. 16919-27-0) (provided for in subheading 2826.90.90)................................................................................... 1/ 9902.01.48 On or before 12/31/2020 No change No change Free 1/ Potassium zirconate (CAS No.16923-95-8) (provided for in subheading 2826.90.90).............................................................. 1/ 9902.01.49 On or before 12/31/2020 No change No change Free 1/ Titanium trichloride (CAS No. 7705-07-9) (provided for in subheading 2827.39.30).............................................................. 1/ 9902.01.50 On or before 12/31/2020 No change No change Free 1/ Cobalt chloride (dichlorocobalt hydrate (1:1)) (CAS No. 7791-13-1) (provided for in subheading 2827.39.60).............. 1/ 9902.01.51 On or before 12/31/2020 No change No change Free 1/ Cesium Chloride (CAS No. 7647-17-8) (provided for in subheading 2827.39.90).............................................................. 1/ 9902.01.52 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 - 5 Note:The shaded areas indicate the provision has expired