9902.11.71 - 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)

This HTS category, 9902.11.71, pertains to a specific type of ion-exchange resin. This particular resin is identified by its chemical composition: sodium salts of sulfonated poly(divinylbenzene-co-ethylstyrene-co-styrene), with the Chemical Abstracts Service (CAS) number 69011-22-9. Its classification is made under the provisions of Chapter 99, which covers temporary legislation and modifications, including those related to Section 22 of the Agricultural Adjustment Act. This means the entry under this code is subject to specific temporary restrictions or provisions, which may differ from the standard classification of similar materials.

As a leaf node, this category does not have subcategories. Its purpose is to precisely identify and provide for the temporary tariff treatment of this specific chemical compound. When classifying goods, it is crucial to distinguish this item from general ion-exchange resins or other polymers that might otherwise fall under Chapter 39. The specificity of the CAS number and the explicit mention of its provision "provided for in subheading 3914.00.60" signifies that this code is for goods that meet the exact chemical and structural requirements outlined, and are being subject to the special rules within Chapter 99. Importers must ensure their goods precisely match the description to benefit from or adhere to the provisions of this HTS code.