Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.25.14 Polyoxypropylen glycol diamine ((3S,4S)-pyrrolidine-3,4-diol) (CAS No. 9046–10–0) (provided for in subheading 3907.20.00) Free No change No change On or before 12/31/2025 . 11583. Polyethylene glycol 450 Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.25.15 Poly(oxy-1,2-ethanediyl),α-hydro-ω-hydroxy-ethane-1,2-diol, ethoxylated, PEG 450 (CAS No. 25322–68–3) (provided for in subheading 3907.20.00) Free No change No change On or before 12/31/2025 . 11584. Medicinal intermediate for investigational use Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.25.16 Poly(oxy-1,2-ethandiyl), α-[[(2,5-dioxo-1-pyrrolidinyl) oxy]carbonyl]-ω-[[(2,5-dioxo-1-pyrrolinyl)oxy]carbonyl]oxy-(di-NHS PEG40K) (CAS No. 122375–06–8) (provided for in subheading 3907.20.00) Free No change No change On or before 12/31/2025 . 11585. Aqueous solutions of carboxylic acid-copolymer-salt in water Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.25.18 Aqueous solutions containing by weight more than 35 percent of 2,5-furandione, polymer with α-[4-(ethenyloxy)butyl]-ω-hydroxypoly(oxy-1,2-ethanediyl), sodium salt (CAS No. 250591–55–0) (provided for in subheading 3907.20.00) 3% No change No change On or before 12/31/2025 . 11586. Aqueous solutions of a modified polymer bearing hydrophilic and hydrophobic groups Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.25.19 Aqueous solutions containing by weight more than 40 percent of 2,5-furandione, polymer with ethenylbenzene, hydrolyzed, 3-(dimethylamino)propyl imide, imide with polyethylene-polypropylene glycol 2-aminopropyl me ether, 2,2′-(1,2-diazenediyl)bis(2-methylbutanenitrile)-initiated (CAS No. 1062609–13–5) (provided for in subheading 3907.20.00) Free No change No