;2-(prop-2-enoylamino)butane-2-sulfonic acid) (CAS No. 40623–75–4) in granule form, with a particle size between 250 and 850 µm (provided for in subheading 3906.90.50) Free No change No change On or before 12/31/2025 . 11578. Flocculant dry polyacrylamides Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.25.10 Flocculant dry polyacrylamides (prop-2-enamide) (CAS No. 9003–05–8) (provided for in subheading 3906.90.50) Free No change No change On or before 12/31/2025 . 11579. Sorbitol, propylene oxide, ethylene oxide polymer Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.25.11 Oxirane, 2-methyl-, polymer with oxirane, ether with D-glucitol (6:1) (CAS No. 56449–05–9) (provided for in subheading 3907.20.00) Free No change No change On or before 12/31/2025 . 11580. Trimethoxysilylpropylcarbamate-terminated polyether Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.25.12 Poly[oxy(methyl-1,2-ethanediyl)], α-(((3-(trimethoxysilyl)propyl)amino)carbonyl)-ω-((((3-(trimethoxysilyl)propyl)amino)carbonyl)oxy)- (CAS No. 216597–12–5) (provided for in subheading 3907.20.00) Free No change No change On or before 12/31/2025 . 11581. Dimethoxy(methyl)silylmethylcarbamate-terminated polyether Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.25.13 Poly(oxy(methyl-1,2-ethanediyl)), α-((((dimethoxymethylsilyl) methyl)amino)carbonyl)-ω-(((((dimethoxymethylsilyl) methyl)amino)carbonyl)oxy)-(CAS No. 611222–18–5) (provided for in subheading 3907.20.00) Free No change No change On or before 12/31/2025 . 11582. Curing agent is used in two- or three-parts epoxy systems 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