Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.07.44 Sodium 2-2'-methylene bis-(4,6-di-tert-butyl phenyl)phosphate (CAS No. 85209–91–2) (provided for in subheading 2934.99.39) Free No change No change On or before 12/31/2020 . 637. UV absorber Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.07.45 2,2-(1,4-Phenylene)bis((4H-3,1-benzoxazine-4-one) (CAS No. 18600–59–4) (provided for in subheading 2934.99.39) Free No change No change On or before 12/31/2020 . 638. 2H-3,1-Benzoxazine-2,4(1H)-dione Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.07.46 2H-3,1-Benzoxazine-2,4(1H)-dione (CAS No. 118–48–9) (provided for in subheading 2934.99.44) Free No change No change On or before 12/31/2020 . 639. Penthiopyrad Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.07.47 (RS)-N-[2-(1,3-Dimethylbutyl)-3-thienyl]-1-methyl-3-(trifluoromethyl)pyrazole-4-carboxamide (Penthiopyrad) (CAS No. 183675–82–3) (provided for in subheading 2934.99.90) Free No change No change On or before 12/31/2020 . 640. 2-Amino-3-cyano thiophene Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.07.48 2-Amino-3-cyanothiophene (CAS No. 4651–82–5) (provided for in subheading 2934.99.90) Free No change No change On or before 12/31/2020 . 641. Tebuthiuron technical Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.07.49 1,3-Dimethyl-1-[5-(2-methyl-2-propanyl)-1,3,4-thiadiazol-2-yl]urea (Tebuthiuron) (CAS No. 34014–18–1) (provided for in subheading 2934.99.90) Free No change No change On or before 12/31/2020 . 642. NEM salt Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.07.50 4-(4-Methylphenyl)-4-oxobutanoic acid - 4-ethylmorpholine (2:1) (CAS No. 171054–89–0)