(Prodiamine) (CAS No. 29091–21–2) (provided for in subheading 2921.59.80) 2.9% No change No change On or before 12/31/2020 . 284. 3,3' Dichlorobenzidine dihydrochloride Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.03.88 3,3'-Dichlorobenzidine dihydrochloride (3,3'-Dichloro-4,4'-biphenyldiamine dihydrochloride) (CAS No. 612–83–9) (provided for in subheading 2921.59.80) 0.3% No change No change On or before 12/31/2020 . 285. Tris[2-[[2,4,8,10-tetra-tert-butyldibe (AO 12) Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.03.89 2-{[2,4,8,10-Tetrakis (2-methyl-2-propanyl) dibenzo[d,f] [1,3,2]dioxaphosphepin-6-yl]oxy}-N,N-bis(2-{[2,4,8,10-tetrakis (2-methyl-2-propanyl)dibenzo[d,f] [1,3,2] dioxaphosphepin-6-yl] oxy}ethyl)ethanamine (CAS No. 80410–33–9) (provided for in subheading 2922.19.60) Free No change No change On or before 12/31/2020 . 286. Dipropoxy-p-toluidin Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.03.90 4-Methyl-N,N-dipropoxyaniline (CAS No. 38668–48–3) (provided for in subheading 2922.19.70) Free No change No change On or before 12/31/2020 . 287. Phytosphingosine Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.03.91 Phytosphingosine ((2S,3S,4R)-2-amino-1,3,4-octadecanetriol) (CAS No. 13552-11-9) (provided for in subheading 2922.19.96) Free No change No change On or before 12/31/2020 . 288. 1-(Dimethylamino)-2-propan-ol (N,N-Diemet) Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.03.92 1-(Dimethylamino)-2-propanol (CAS No. 108–16–7) (provided for in subheading 2922.19.96) Free No change No change On or before 12/31/2020 . 289. Phytosphingosine HCl Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.03.93 (2S,3S,4R)-2-Amino-1,3,4-octadecanetriol hydrochloride