On or before 12/31/2020 . 1045. Alginic acid and other alginates Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.11.61 Alginic acid (CAS No. 9005–32–7), ammonium alginate (CAS No. 9005–34–9), potassium alginate (CAS No. 9005–36–1), calcium alginate (CAS No. 9005–35–0) and magnesium alginate (CAS No. 37251–44–8) (provided for in subheading 3913.10.00) Free No change No change On or before 12/31/2020 . 1046. Sodium alginate containing citrate Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.11.62 Sodium alginate (CAS No. 9005–38–3) containing citrate (provided for in subheading 3913.10.00) Free No change No change On or before 12/31/2020 . 1047. Sodium hyaluronate Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.11.63 Sodium hyaluronate (CAS No. 9067–32–7) (provided for in subheading 3913.90.20) 4.3% No change No change On or before 12/31/2020 . 1048. Weak acid cation ion-exchange resin Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.11.64 Ion-exchange resin, copolymerized from acrylonitrile with divinylbenzene, ethylvinylbenzene and 1,7-octadiene, hydrolyzed (CAS No. 130353–60–5) (provided for in subheading 3914.00.60) Free No change No change On or before 12/31/2020 . 1049. Weak acid macroporous cation ion-exchange resins Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.11.65 Ion-exchange resin consisting of poly(acrylic acid-co-2,2′-oxydiethanol-co-ethenoxyethene), acid form (CAS No. 359785–58–3) (provided for in subheading 3914.00.60) Free No change No change On or before 12/31/2020 . 1050. Ion-exchange resin comprised of divinylbenzene co-polymerized with styrene and ethylstyrene Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.11.66 Ion-exchange resin comprised of