HTS code 3201.90.25.00 covers "Tanning extracts of vegetable origin; tannins and their salts, ethers, esters and other derivatives › Other › Extracts of canaigre, chestnut, curupay, divi-divi, eucalyptus, gambier, hemlock, larch, mangrove, myrobalan, oak, sumac, tara, urunday or valonia" under the US Harmonized Tariff Schedule. This is the official duty rate charged by US Customs when this product is imported into the United States, sourced directly from the U.S. International Trade Commission and refreshed daily.