Ion-exchangers based on polymers of headings 3901 to 3913, in primary forms:

Cross-linked polyvinylbenzyltrimethylammonium chloride (Cholestyramine resin USP)

Other

Other articles of plastics and articles of other materials of headings 3901 to 3914:

Aluminum tris(ethyl phosphonate) (Fosetyl-Al) (CAS No. 39148-24-8) (provided for in subheading 2920.90.51)

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)

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)

Ion-exchange resin comprised of divinylbenzene co-polymerized with styrene and ethylstyrene (CAS No. 9052-95-3) in spherical beads with a mean particle size between 0.30 and 1.20 mm (provided for in subheading 3914.00.60)

Ion-exchange resin comprised of a copolymer of methacrylic acid cross-linked with divinylbenzene, in the hydrogen ionic form (CAS No. 50602-21-6) (provided for in subheading 3914.00.60)

Ion-exchange resin utilizing a type I quaternary ammonium functional group consisting of benzene (chloromethyl)​ethenyl-​, polymer with diethenylbenzene, compound with N,​N-​diethylethanamine (CAS No. 63453-90-7) in spherical beads with a mean particle size between 0.30 and 1.20 mm (provided for in subheading 3914.00.60)

Ion-exchange resin, free base form, utilizing a tertiary amine functional group consisting of 2-​propenamide, N-​[3-​(dimethylamino)​propyl]​-​, polymer with diethenylbenzene and 1,​1'-​[oxybis(2,​1-​ethanediyloxy)​]​bis[ethene] (CAS No. 65899-87-8) in spherical beads with a mean particle size between 0.30 and 1.20 mm (provided for in subheading 3914.00.60)

Ion-exchange resin, chloride form, utilizing a quarternary ammonium functional group, consisting of 1,2-bis(ethenyl)benzene; 4-[(E)-2-[(E)-2-but-3-enoxyethenoxy]ethenoxy]but-1-ene; trimethyl-[3-(prop-2-enoylamino)propyl]azanium; chloride (CAS No. 65997-24-2) in spherical beads with a mean particle size between 0.30 and 1.20 mm (provided for in subheading 3914.00.60)

Ion-exchange resin comprising sodium salts of sulfonated poly(divinylbenzene-co-ethylstyrene-co-styrene) (CAS No. 69011-22-9) (provided for in subheading 3914.00.60)

Anion ion-exchange resin, hydroxide form, chloromethylated, and 2-​(dimethylamino)​ethanol-​quaternized hydroxide of poly(divinylbenzene-co-styrene-co-ethylstyrene) (CAS No. 69011-16-1) in spherical beads with a mean particle size between 0.30 and 1.20 mm (provided for in subheading 3914.00.60)

Chloromethylated, trimethylamine-​quaternized poly(divinylbenzene-co-styrene-co-ethylstyrene) (CAS No. 69011-19-4) (provided for in subheading 3914.00.60)

Poly(divinylbenzene-co-acrylic acid) (CAS No. 9052-45-3) (provided for in subheading 3914.00.60)

Iminidiacetic acid ion-exchange resin (sodium 2,2'-[(4-vinylbenzyl)imino]diacetate - 1,4-divinylbenzene (2:1:1) (CAS no. 70660-50-3) in spherical beads with a mean particle size between 0.425 and 1.20 mm (provided for in subheading 3914.00.60)

Ion-exchange resin and chelating resin, with a isothiouronium functional group, iminodiacetic acid ion-exchange resin (CAS No. 109945-55-3) in spherical beads with a mean particle size between 0.30 and 1.20 mm (provided for in subheading 3914.00.60)

Ion-exchange resin and chelating resin with an aminophosphoric functional group, polystyrene resin with aminophosphonic acid groups (CAS No. 125935-42-4) in spherical beads with a mean particle size between 0.30 and 1.20 mm (provided for in subheading 3914.00.60)

Potassium methacrylate-divinylbenzene copolymer (Polacrilin potassium) (CAS No. 65405-55-2) (provided for in subheading 3914.00.60)

Other articles of plastics and articles of other materials of headings 3901 to 3914:

Aluminum tris(ethyl phosphonate) (Fosetyl-Al) (CAS No. 39148-24-8) (provided for in subheading 2920.90.51)

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)

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)

Ion-exchange resin comprised of divinylbenzene co-polymerized with styrene and ethylstyrene (CAS No. 9052-95-3) in spherical beads with a mean particle size between 0.30 and 1.20 mm (provided for in subheading 3914.00.60)

Ion-exchange resin comprised of a copolymer of methacrylic acid cross-linked with divinylbenzene, in the hydrogen ionic form (CAS No. 50602-21-6) (provided for in subheading 3914.00.60)

Ion-exchange resin utilizing a type I quaternary ammonium functional group consisting of benzene (chloromethyl)​ethenyl-​, polymer with diethenylbenzene, compound with N,​N-​diethylethanamine (CAS No. 63453-90-7) in spherical beads with a mean particle size between 0.30 and 1.20 mm (provided for in subheading 3914.00.60)

Ion-exchange resin, free base form, utilizing a tertiary amine functional group consisting of 2-​propenamide, N-​[3-​(dimethylamino)​propyl]​-​, polymer with diethenylbenzene and 1,​1'-​[oxybis(2,​1-​ethanediyloxy)​]​bis[ethene] (CAS No. 65899-87-8) in spherical beads with a mean particle size between 0.30 and 1.20 mm (provided for in subheading 3914.00.60)

Ion-exchange resin, chloride form, utilizing a quarternary ammonium functional group, consisting of 1,2-bis(ethenyl)benzene; 4-[(E)-2-[(E)-2-but-3-enoxyethenoxy]ethenoxy]but-1-ene; trimethyl-[3-(prop-2-enoylamino)propyl]azanium; chloride (CAS No. 65997-24-2) in spherical beads with a mean particle size between 0.30 and 1.20 mm (provided for in subheading 3914.00.60)

Ion-exchange resin comprising sodium salts of sulfonated poly(divinylbenzene-co-ethylstyrene-co-styrene) (CAS No. 69011-22-9) (provided for in subheading 3914.00.60)

Anion ion-exchange resin, hydroxide form, chloromethylated, and 2-​(dimethylamino)​ethanol-​quaternized hydroxide of poly(divinylbenzene-co-styrene-co-ethylstyrene) (CAS No. 69011-16-1) in spherical beads with a mean particle size between 0.30 and 1.20 mm (provided for in subheading 3914.00.60)

Chloromethylated, trimethylamine-​quaternized poly(divinylbenzene-co-styrene-co-ethylstyrene) (CAS No. 69011-19-4) (provided for in subheading 3914.00.60)

Poly(divinylbenzene-co-acrylic acid) (CAS No. 9052-45-3) (provided for in subheading 3914.00.60)

Iminidiacetic acid ion-exchange resin (sodium 2,2'-[(4-vinylbenzyl)imino]diacetate - 1,4-divinylbenzene (2:1:1) (CAS no. 70660-50-3) in spherical beads with a mean particle size between 0.425 and 1.20 mm (provided for in subheading 3914.00.60)

Ion-exchange resin and chelating resin, with a isothiouronium functional group, iminodiacetic acid ion-exchange resin (CAS No. 109945-55-3) in spherical beads with a mean particle size between 0.30 and 1.20 mm (provided for in subheading 3914.00.60)

Ion-exchange resin and chelating resin with an aminophosphoric functional group, polystyrene resin with aminophosphonic acid groups (CAS No. 125935-42-4) in spherical beads with a mean particle size between 0.30 and 1.20 mm (provided for in subheading 3914.00.60)

Potassium methacrylate-divinylbenzene copolymer (Polacrilin potassium) (CAS No. 65405-55-2) (provided for in subheading 3914.00.60)