(CAS No. 119–27–7) (provided for in subheading 2909.30.60) Free No change No change On or before 12/31/2020 . 136. Allyl pentaerythritol Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.02.37 2-(Hydroxymethyl)-2-(prop-2-enoxymethyl) propane-1,3-diol (CAS No. 91648–24–7) (provided for in subheading 2909.49.60) Free No change No change On or before 12/31/2020 . 137. t-Butyl cumyl peroxide Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.02.38 t-Butyl cumyl peroxide ({2-[(2-methyl-2-propanyl)peroxy]-2-propanyl}benzene) (CAS No. 3457–61–2) (provided for in subheading 2909.60.10) Free No change No change On or before 12/31/2020 . 138. Dicumyl peroxide Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.02.39 Bis(α,α-dimethylbenzyl) peroxide (dicumyl peroxide) (CAS No. 80–43–3) (provided for in subheading 2909.60.20) Free No change No change On or before 12/31/2020 . 139. Cumene hydroperoxide Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.02.40 2-Phenyl-2-propanyl hydroperoxide (cumene hydroperoxide) (CAS No. 80–15–9) (provided for in subheading 2909.60.20) Free No change No change On or before 12/31/2020 . 140. 2,5-Dimethyl-2,5-di(tert-butylperoxy)hexane Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.02.41 2,5-Dimethyl-2,5-bis[(2-methyl-2-propanyl)peroxy]hexane (CAS No. 78–63–7) (provided for in HTS subheading 2909.60.50). Free No change No change On or before 12/31/2020 . 141. Allyl glycidyl ether Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.02.42 (2S)-2-[(Allyloxy)methyl]oxirane (CAS No. 106–92–3) (provided for in subheading 2910.90.91) Free No change No change On or before 12/31/2020 . 142. 2-Bromo-1,1-dimethoxyethane Subchapter II of chapter 99 is amended by inserting in