; and (B) by striking 12/31/2020 and inserting 12/31/2024 . (14) NTCDA Heading 9902.03.01 is amended— (A) by amending the article description to read as follows: 1,4,5,8-Naphthalenetetracarboxylic dianhydride (NTCDA) (CAS No. 81–30–1) (provided for in subheading 2917.39.70) ; and (B) by striking 12/31/2020 and inserting 12/31/2024 . (15) Stabilizer of foams Heading 9902.03.11 is amended— (A) by amending the article description to read as follows: Octyl 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate (CAS No. 125643–61–0) (provided for in subheading 2918.29.65) ; and (B) by striking 12/31/2020 and inserting 12/31/2024 . (16) Hindered phenolic antioxidant Heading 9902.03.25 is amended— (A) by amending the article description to read as follows: Triethylene glycol bis[3-(3-tert-butyl-4-hydroxy-5-methyl-phenyl)propionate] (CAS No. 36443–68–2) (provided for in subheading 2918.99.43) ; and (B) by striking 12/31/2020 and inserting 12/31/2024 . (17) D-HPPA Heading 9902.03.28 is amended— (A) by amending the article description to read as follows: (R)-(+)-2-(4-Hydroxyphenoxy)propionic acid (CAS No. 94050–90–5) (provided for in subheading 2918.99.43) ; and (B) by striking 12/31/2020 and inserting 12/31/2024 . (18) Tetrachlorvinfos Heading 9902.03.35 is amended— (A) by amending the article description to read as follows: [(Z)-2-Chloro-1-(2,4,5-trichlorophenyl)ethenyl] dimethyl phosphate (Tetrachlorvinfos) (CAS No. 22248–79–9) (provided for in subheading 2919.90.30) ; and (B) by striking 12/31/2020 and inserting 12/31/2024 . (19) Propargite Heading 9902.03.41 is amended— (A) by amending the article description to read as follows: 2-[4-(2-Methyl-2-propanyl)phenoxy]cyclohexyl 2-propyn-1-yl sulfite (Propargite) (CAS No. 2312–35–8) (provided for in subheading 2920.90.10)