change On or before 12/31/2024 . 4242. tert-Octylamine Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.20.46 2,4,4-Trimethylpentan-2-amine (CAS No. 107–45–9) (provided for in subheading 2921.19.61) Free No change No change On or before 12/31/2024 . 4243. Octadecylamine Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.20.47 Octadecan-1-amine (Octadecylamine) (CAS No. 124–30–1) (provided for in subheading 2921.19.61) Free No change No change On or before 12/31/2024 . 4244. N′-(3-Aminopropyl)-N′-dodecylpropane-1,3-diamine Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.20.48 N′-(3-Aminopropyl)-N′-dodecylpropane-1,3-diamine (CAS No. 2372–82–9) (provided for in subheading 2921.29.00) Free No change No change On or before 12/31/2024 . 4245. 1,10-Diaminodecane Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.20.49 Decane-1,10-diamine (CAS No. 646–25–3) (provided for in subheading 2921.29.00) Free No change No change On or before 12/31/2024 . 4246. 1,5-Pentanediamine Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.20.50 Pentane-1,5-diamine (CAS No. 462–94–2) (provided for in subheading 2921.29.00) Free No change No change On or before 12/31/2024 . 4247. Dicyclohexylamine Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.20.51 N-cyclohexylcyclohexanamine (CAS No. 101–83–7) (provided for in subheading 2921.30.30) Free No change No change On or before 12/31/2024 . 4248. Amantadine hydrochloride 99% Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.20.52 Adamantan-1-amine hydrochloride having a purity of at least 99 percent (CAS No. 665–66–7) (provided for in subheading 2921.30.50) Free No change No change On or before 12/31/2024 .