or before 12/31/2020 . 434. THPS Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.05.40 Tetrakis (hydroxymethyl)phosphonium sulfate (CAS No. 55566–30–8) (provided for in subheading 2931.90.90) 0.2% No change No change On or before 12/31/2020 . 435. Glyphosate Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.05.41 N-(Phosphonomethyl) glycine (Glyphosate) (CAS No. 1071–83–6) (provided for in subheading 2931.90.90) 3.3% No change No change On or before 12/31/2020 . 436. Metatin katalysator Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.05.42 Bis[(2,2-dimethyloctanoyl)oxy] (dimethyl)stannane (CAS No. 68928–76–7) (provided for in subheading 2931.90.90) Free No change No change On or before 12/31/2020 . 437. Ethephon Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.05.43 (2-Chloroethyl)phosphonic acid (Ethephon) (CAS No.16672–87–0) (provided for in subheading 2931.90.90) Free No change No change On or before 12/31/2020 . 438. Silicone oil Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.05.44 Dimethyl, methyl (polyethylene oxide acetate-capped) siloxane (CAS No. 70914–12–4) (provided for in subheading 2931.90.90) Free No change No change On or before 12/31/2020 . 439. Dinotefuran Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.05.45 2-Methyl-1-nitro-3-(tetrahydro-2-furanylmethyl)guanidine (Dinotefuran) (CAS No. 165252–70–0) (provided for in subheading 2932.19.51) Free No change No change On or before 12/31/2020 . 440. Sorbitan caprylate Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.05.46 3,6-Anhydro-1-O-octanoylhexitol (sorbitan caprylate) (CAS No. 60177–36–8) (provided for in subheading 2932.19.51) Free No change No