amended by inserting in numerical sequence the following new heading: 9902.19.46 1-(Chloromethyl)-3-ethylbenzene (CAS No. 26968–58–1) (provided for in subheading 2903.99.80) Free No change No change On or before 12/31/2024 . 4147. Perfluoroalkyl sulfonate Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.19.47 Potassium 1,1,2,2,3,3,4,4,4-nonafluorobutane-1-sulphonate (CAS No. 29420–49–3) (provided for in subheading 2904.99.50) Free No change No change On or before 12/31/2024 . 4148. D-Mannitol Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.19.48 (2R,3R,4R,5R)-Hexane-1,2,3,4,5,6-hexol (D-Mannitol) (CAS No. 69–65–8) (provided for in subheading 2905.43.00) 2.9% No change No change On or before 12/31/2024 . 4149. 3,3,4,4,5,5,6,6,7,7,8,8,8-Tridecafluorooctan-1-ol Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.19.49 3,3,4,4,5,5,6,6,7,7,8,8,8-Tridecafluorooctan-1-ol (CAS No. 647–42–7) (provided for in subheading 2905.59.90) Free No change No change On or before 12/31/2024 . 4150. Phenyl isopropanol Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.19.50 2-Phenylpropan-2-ol (CAS No. 617–94–7) (provided for in subheading 2906.29.60) Free No change No change On or before 12/31/2024 . 4151. Hydroxytyrosol Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.19.51 4-(2-Hydroxyethyl)benzene-1,2-diol (Hydroxytyrosol) (CAS No. 10597–60–1) (provided for in subheading 2907.29.90) Free No change No change On or before 12/31/2024 . 4152. 1,6-Dihydroxynaphthalene Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.19.52 Naphthalene-1,6-diol (CAS No. 575–44–0) (provided for in subheading 2907.29.90) Free No change No change On or before 12/31/2024 . 4153. Antioxidant for plastics and rubber Subchapter