4-(4-Chloro-2-methylphenoxy) butyric acid (CAS No. 94–81–5) (provided for in subheading 2918.99.18) Free No change No change On or before 12/31/2024 . 4230. 2,4-D Butoxyethylester Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.20.34 2-Butoxyethyl 2-(2,4-dichlorophenoxy)acetate (CAS No. 1929–73–3) (provided for in subheading 2918.99.20) Free No change No change On or before 12/31/2024 . 4231. 2-(2,4-Dichlorophenoxy)acetic acid Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.20.35 2-(2,4-Dichlorophenoxy)acetic acid (CAS No. 94–75–7) (provided for in subheading 2918.99.20) 4.9% No change No change On or before 12/31/2024 . 4232. Diglycolic acid 98% Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.20.36 2-(Carboxymethoxy)acetic acid (diglycolic acid) having a purity of at least 98 percent (CAS No. 110–99–6) (provided for in subheading 2918.99.50) Free No change No change On or before 12/31/2024 . 4233. Tri-iso-butyl phosphate (TiBP) Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.20.37 tris(2-Methylpropyl) phosphate (CAS No. 126–71–6) (provided for in subheading 2919.90.50) Free No change No change On or before 12/31/2024 . 4234. Trimethyl phosphite Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.20.38 Trimethyl phosphite (CAS No. 121–45–9) (provided for in subheading 2920.23.00) Free No change No change On or before 12/31/2024 . 4235. Organic phosphite Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.20.39 1,9-Dicyclohexyl-11-hydroxy-3,7-dimethyl-5H-benzo[d] [1,3,2]benzodioxaphosphocine (CAS No. 73912–21–7) (provided for in subheading 2920.90.20) Free No change No change On or before 12/31/2024 . 4236. Diethyl sulfate Subchapter II of chapter 99 is amended by inserting in