Purolite A400 Anion Exchange Resin
Purolite A400 is a strong base anion exchange resin on polystyrene skeleton for dealkalization and organics removal. Under 3914.00.60.00 as 'Other' ion-exchanger from 3903 polymers, meeting 95% styrene-divinylbenzene content per notes.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If chemically modified polystyrene not specific to ion-exchange
Per note (a)(3), chemically modified polymers without specific ion-exchange use go to 'Other' in 3903 series.
If silicone-modified for specific industrial membranes
Silicones predominate, shifting to heading 3910 regardless of ion-exchange function.
If pre-packed in industrial filter housings
Parts of water purification machinery under 8421 supersede primary polymer heading.
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Import Tips & Compliance
• Document quaternary ammonium functionalization; ensure declaration specifies 'primary forms' to avoid parts classification
• Common issue: confusing with household filters under 3924 exclusion for photo albums but applicable broadly
Related Products under HTS 3914.00.60.00
Purolite C100 Cation Exchange Resin
Purolite C100 is a strong acid cation exchange resin based on polystyrene-divinylbenzene copolymer (from heading 3903), in primary bead form, used for water softening by exchanging calcium and magnesium ions. It falls under HTS 3914.00.60.00 as an ion-exchanger derived from polymers of headings 3901-3913, classified as 'Other' since it's not specifically named elsewhere. The polymer meets the 95% monomer content rule for polystyrene.
Amberlite IR-120 Strong Acid Cation Resin
Amberlite IR-120 is a gel-type strong acid cation exchange resin based on styrene-divinylbenzene copolymer, used in demineralization processes. Classified under 3914.00.60.00 as 'Other' ion-exchangers in primary forms from polymers like those in 3903. It complies with subheading notes requiring predominant monomer content.
Dowex 50WX8 Cation Exchange Resin
Dowex 50WX8 is a high-capacity strong acid cation resin from polystyrene matrix, ideal for nuclear and pharmaceutical purification. It qualifies under HTS 3914.00.60.00 for ion-exchangers based on heading 3903 polymers in primary bead form, as 'Other'.
Amberjet 4400 Uniform Particle Anion Resin
Amberjet 4400 offers uniform bead size for strong base anion exchange in condensate polishing, derived from styrene copolymer. Classifies in 3914.00.60.00 as other ion-exchangers in primary forms from 3903 polymers.
Lewatit MonoPlus S100 Cation Resin
Lewatit MonoPlus S100 is a monodisperse strong acid cation exchanger for ultra-pure water, based on acrylic-divinylbenzene (3906 polymer). HTS 3914.00.60.00 covers it as 'Other' ion-exchanger in primary form.
Diaion SK1BH Cation Exchange Resin
Diaion SK1BH gel strong acid cation resin from styrene-DVB for deionization, classified under 3914.00.60.00 as other polymer-based ion-exchanger.