3907.91.40.00 - Other

This HTS category, 3907.91.40.00, covers "Other" allyl resins that are in unsaturated form and have been compounded. Compounded allyl resins refer to those that have been mixed with additives, such as fillers, plasticizers, pigments, or other modifiers, to enhance their properties or prepare them for specific applications. This compounding process distinguishes them from uncompounded allyl resins.

The primary distinction between this category and its sibling, HTS 3907.91.20.00, lies in the state of the allyl resin. While 3907.91.20.00 encompasses allyl resins that are in their pure, unmixed form, this category is specifically for those that have undergone a compounding process. This means the material has had other substances intentionally incorporated into it, altering its original characteristics.

As a leaf node, there are no further subcategories under 3907.91.40.00. Therefore, the focus for classification within this code is on identifying unsaturated allyl resins that have been compounded, as opposed to those that are uncompounded. Classification relies on verifying the presence of additives that modify the base allyl resin, thereby moving it from the "uncompounded" category to this "other" (compounded) classification.