1518.00.40.00 - Other

This HTS category, 1518.00.40.00, encompasses "Other" inedible mixtures and preparations derived from animal, vegetable, or microbial fats and oils, or their fractions. It includes products that have undergone significant chemical modification beyond simple rendering, such as oxidation, sulfurization, blowing, or polymerization by heat under specific conditions (vacuum or inert gas). This heading is specifically for those prepared fats and oils that are not intended for edible use and are not elsewhere classified.

This classification distinguishes itself from its sibling, 1518.00.20.00, which is exclusively for preparations derived from linseed or flaxseed oil, regardless of modification. Therefore, any inedible mixtures or preparations falling under heading 1518 that are *not* based on linseed or flaxseed oil will be classified under this "Other" residual category. The key differentiating factor is the specific source oil when it is linseed or flaxseed, versus any other animal, vegetable, or microbial fat or oil.

As this is a leaf node, there are no further subdivisions. Classification within 1518.00.40.00 relies on the specific chemical modifications applied to the fats and oils and the absence of classification under more specific provisions, particularly for edible preparations or those based on specific oil types like linseed. The "Other" designation signifies a residual classification for a broad range of chemically modified inedible fat and oil preparations.