101) (CAS No. 1309–37–1) (provided for in subheading 2821.10.00) 2.5% No change No change On or before 12/31/2020 . 37. Hydroxylamine free base Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.01.36 Hydroxylamine (CAS No. 7803–49–8) (provided for in subheading 2825.10.00) 2.7% No change No change On or before 12/31/2020 . 38. Hydroxylamine sulphate Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.01.37 Hydroxylamine sulfate (bis(hydroxylammonium) sulfate) (CAS No. 10039–54–0) (provided for in subheading 2825.10.00) Free No change No change On or before 12/31/2020 . 39. Hydrazine 64% Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.01.38 Hydrazine, 64 percent solution in water (CAS No. 302–01–2) (provided for in subheading 2825.10.00) Free No change No change On or before 12/31/2020 . 40. Germanium dioxide (GeO2) Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.01.39 Germanium dioxide, powder form (CAS No. 1310–53–8) (provided for in subheading 2825.60.00) Free No change No change On or before 12/31/2020 . 41. Tin (IV) oxide, SnO2 Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.01.40 Tin(IV) oxide (stannic oxide) (Dioxostannane) (CAS No. 18282-10-5) (provided for in subheading 2825.90.20) Free No change No change On or before 12/31/2020 . 42. Ammonium bifluoride Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.01.41 Ammonium bifluoride (Ammonium fluoride hydrofluoride (1:1:1)) (CAS No. 1341–49–7) (provided for in subheading 2826.19.10) Free No change No change On or before 12/31/2020 . 43. Sodium fluoride Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.01.42 Sodium Fluoride (CAS No. 7681–49–4) (provided for in