Depending on the specific chemical compound and country of origin, certain synthetic organic chemicals may be subject to antidumping or countervailing duty orders. Importers should check the US International Trade Commission and Commerce Department order lists for any active orders covering sulfonated or aromatic tanning condensates from specific origins.

Syntans offer more uniform molecular weight distribution and predictable reactivity compared to the complex polyphenol mixtures in vegetable extracts. They are commonly used in retanning to improve softness, fill, and dye uptake, and are central to chromium-free tanning systems increasingly demanded by automotive and luxury goods brands with restricted substance requirements.