5403.33.00 - Of cellulose acetate

This HTS category, 5403.33.00, specifically classifies artificial filament yarn composed of cellulose acetate. This includes yarn that is not intended for retail sale and comprises artificial monofilaments with a decitex of less than 67. The defining characteristic of this classification is the material of origin – cellulose acetate – distinguishing it from other types of artificial filament yarn.

Within the broader classification of "Other yarn, single" under heading 5403.3, this category differentiates itself from its siblings, 5403.31.00 and 5403.32.00.00, which are dedicated to viscose rayon yarns based on their twist levels. Similarly, it is distinct from the residual "Other" category (5403.39).

This classification further subdivides based on the construction and twist of the cellulose acetate filament. The subcategories, 5403.33.00.20 and 5403.33.00.40, differentiate between monofilament or multifilament yarn with a low twist (less than 5 turns per meter) and multifilament yarn with a higher twist (5 turns or more per meter), reflecting important physical characteristics that are crucial for accurate customs classification.