3507.90.70.00 - Other

This HTS category, 3507.90.70.00, encompasses a broad range of prepared enzymes that do not fall under more specific subheadings within Chapter 35. It serves as a residual category for enzymes that are not explicitly listed or defined elsewhere in the tariff. These prepared enzymes are typically derived from biological sources, such as microorganisms or animal tissues, and are utilized for their catalytic properties in various industrial, commercial, or laboratory applications. The preparation can involve purification, concentration, stabilization, or formulation into a usable form.

Distinguishing this category from its sibling, 3507.90.20.00 (Pencillin G amidase), is crucial. While Pencillin G amidase is a specific enzyme with a defined industrial application (primarily in the production of semi-synthetic penicillins), this "Other" category covers all other prepared enzymes not assigned to that specific subheading. Therefore, if an enzyme's function is not directly analogous to Pencillin G amidase, and it isn't otherwise classified, it would likely be directed to this residual classification.

As 3507.90.70.00 is a leaf node, it does not have further subcategories. Classification within this heading relies on the enzyme's identified biological origin and its prepared form, with the primary determinant being the exclusion from more specifically enumerated enzyme categories. Examples of products that might be classified here include various proteases, amylases, lipases, cellulases, or other enzymatic preparations used in sectors like food and beverage production, detergent manufacturing, textile processing, or pharmaceutical synthesis, provided they are not otherwise specified.