;2-hydroxypropanoate) (CAS No. 515–98–0) having a purity of at least 99 percent (provided for in subheading 2918.11.51) Free No change No change On or before 12/31/2024 . 4224. Triethyl 2-hydroxypropane-1,2,3-tricarboxylate Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.20.28 Triethyl 2-hydroxypropane-1,2,3-tricarboxylate (CAS No. 77–93–0) (provided for in subheading 2918.15.50) Free No change No change On or before 12/31/2024 . 4225. Diisostearyl malate Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.20.29 Carboxylic acid of bis(16-methylheptadecyl) 2-hydroxybutanedioate (CAS No. 81230–05–9) (provided for in subheading 2918.19.90) Free No change No change On or before 12/31/2024 . 4226. Salicylic acid Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.20.30 2-Hydroxybenzoic acid (salicylic acid) (CAS No. 69–72–7) (provided for in subheading 2918.21.50) Free No change No change On or before 12/31/2024 . 4227. Hexyl salicylate Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.20.31 Hexyl 2-hydroxybenzoate (CAS No. 6259–76–3) (provided for in subheading 2918.23.20) Free No change No change On or before 12/31/2024 . 4228. Alpha-ketogluteric acid Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.20.32 Alpha-ketogluteric acid (2-oxopentanedioic acid) (CAS No. 328–50–7) (provided for in subheading 2918.30.90) Free No change No change On or before 12/31/2024 . 4229. MCPB herbicide Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.20.33 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