before 12/31/2020 . 771. 2,4-Dinitrophenol, also called sulphur black 1 Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.08.81 2,4-Dinitrophenol (Sulfur Black 1) (CAS No. 1326–82–5) (provided for in subheading 3204.19.30) Free No change No change On or before 12/31/2020 . 772. Mono or diphthalimido methyl cupcn Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.08.82 Mono or diphthalimido methyl copper phthalocyanine ([2-(29H,31H-phthalocyaninylmethyl)-1H-isoindole-1,3(2H)-dionato(2-)-N29,N30,N31,N32]copper) (CAS No. 42739–64–0) (provided for in subheading 3204.19.50) Free No change No change On or before 12/31/2020 . 773. Solubilized sulphur black 1 Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.08.83 Solubilized Sulphur Black 1 (CAS No. 1326–83–6) (provided for in subheading 3204.19.50) Free No change No change On or before 12/31/2020 . 774. Optical brightener Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.08.84 2,2'-Thiene-2,5-diylbis(5-tert-butyl-1,3-benzoxazole) (CAS No. 7128–64–5) (provided for in subheading 3204.20.80) Free No change No change On or before 12/31/2020 . 775. Optical brightener Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.08.85 2,2'-(Vinylenedi-p-phenylene)bisbenzoxazole (CAS No. 1533–45–5) (provided for in subheading 3204.20.80) Free No change No change On or before 12/31/2020 . 776. Phthalocyanine blue additive CAS no 70750-63-9 Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.08.86 N,N-Dimethyl-N-octadecyl-1-octadecanaminium-(Sp-4-2)-[29H,31H-phthalocyanine-2- sulfonato-N29,N30,N31,N32]cuprate (phthalocyanine blue additive) (CAS No. 70750–63–9) (provided for in subheading 3204.90.00) Free No change No change On or before 12/31/2020 . 777. Organic