3503.00.55 - Other

This category, HTS 3503.00.55, encompasses "Other" glues of animal origin that do not fall under the specific subheadings for fish glue or inedible gelatin and animal glue. It serves as a residual category for various animal-derived adhesives and glues not otherwise enumerated. The primary classification criterion here is the material origin (animal) and its function as a glue or adhesive, excluding specific preparations like casein glues (heading 3501) or those explicitly designated as fish glue or inedible.

Distinguishing this category from its siblings, HTS 3503.00.10.00 covers only fish glue, a specific type of animal glue derived from fish. The sibling category "Inedible gelatin and animal glue" covers a broader range of animal-derived glues intended for non-food applications. Therefore, HTS 3503.00.55 is for those animal glues that are neither fish glue nor explicitly classified as inedible gelatin and animal glue, nor are they edible gelatin, photographic gelatin, or other specialized gelatin derivatives falling under its subcategories.

The subcategories under HTS 3503.00.55 provide further refinement based on the intended use of the gelatin or animal glue. HTS 3503.00.55.10 covers edible gelatin, which is intended for consumption and used in food products. HTS 3503.00.55.20 specifically addresses photographic gelatin, crucial for its light-sensitive properties in photographic processes. The residual subcategory, HTS 3503.00.55.50 ("Other"), captures any remaining gelatin or animal glue not meeting the criteria for edible or photographic gelatin, ensuring comprehensive coverage within the broader scope of animal-derived glues.