9902.11.72 - 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)
Details
| Field | Value |
|---|---|
| Unit of Quantity | N/A |
| General Rate of Duty (Column 1 - General) | Free |
| Special Rate of Duty (Column 1 - Special) | No change |
| Column 2 Rate of Duty | No change |
| Quota Quantity | N/A |
| Additional Duties | N/A |
Overview
This HTS category, 9902.11.72, specifically classifies a particular type of anion ion-exchange resin. The resin is identified by its chemical structure: hydroxide form, chloromethylated, and quaternized with 2-(dimethylamino)ethanol, derived from a copolymer of divinylbenzene, styrene, and ethylstyrene. It is further characterized by its physical form as spherical beads with a mean particle size ranging from 0.30 to 1.20 mm. Notably, this classification acknowledges that these resins are provided for under subheading 3914.00.60, indicating a temporary or special classification provision.
Given that Chapter 99 encompasses temporary legislation and special provisions, this category distinguishes itself from the broad range of permanent HTS classifications found in earlier chapters, such as Section I (Live Animals) or Section VI (Products of the Chemical or Allied Industries). While the resin's base material aligns with polymers found in Chapter 39, its specific chemical modification and designated purpose for special tariff treatment place it outside the standard tariff lines for general-purpose resins. The existence of the CAS number (69011-16-1) and detailed physical specifications serve as crucial identifiers for accurate classification within this unique chapter.
As this is a leaf node, there are no further subcategories within 9902.11.72. The precise definition and criteria outlined in the description are intended to provide definitive guidance for the importation of this specific anion ion-exchange resin. Importers should ensure that their product precisely matches the chemical composition, physical form (spherical beads within the specified size range), and functional characteristics described to correctly apply this temporary classification.