following new heading: 9902.01.48 Potassium fluotitanate (Dipotassium hexafluorotitanate(2-)) (CAS No. 16919–27–0) (provided for in subheading 2826.90.90) Free No change No change On or before 12/31/2020 . 50. Potassium zirconate Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.01.49 Potassium zirconate (CAS No.16923–95–8) (provided for in subheading 2826.90.90) Free No change No change On or before 12/31/2020 . 51. Titanium trichloride Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.01.50 Titanium trichloride (CAS No. 7705–07–9) (provided for in subheading 2827.39.30) Free No change No change On or before 12/31/2020 . 52. Cobalt chloride Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.01.51 Cobalt chloride (dichlorocobalt hydrate (1:1)) (CAS No. 7791–13–1) (provided for in subheading 2827.39.60) Free No change No change On or before 12/31/2020 . 53. Cesium chloride Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.01.52 Cesium Chloride (CAS No. 7647–17–8) (provided for in subheading 2827.39.90) Free No change No change On or before 12/31/2020 . 54. Cesium iodide Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.01.53 Cesium iodide (CAS No. 7789–17–5) (provided for in subheading 2827.60.51) Free No change No change On or before 12/31/2020 . 55. Sodium sulfides Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.01.54 Sodium sulfide (CAS No. 1313–82–2) (provided for in subheading 2830.10.00) Free No change No change On or before 12/31/2020 . 56. Sodium thiosulfate Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.01.55 Sodium Thiosulfate Pentahydrate (Sodium sulfurothioate hydrate (2:1.5)) (CAS No.10102–17–7) (provided for in