29222110

HS code 2922.21.10.00 (Chapter 29 "Organic chemicals"; Heading 2922 "Oxygen-function amino-compounds"; Subheading 292221 "- - Aminohydroxynaphthalenesulphonic acids and their salts") under the United States tariff schedule classifies "1-Amino-8-hydroxy-3,6-naphthalenedisulfonic acid; 4-Amino-5-hydroxy-1,3-naphthalenedisulfonic acid (Chicago acid); 4-Amino-5-hydroxy-1,3-naphthalenedisulfonic acid, potassium salt; 4-Amino-5-hydroxy-1,3-naphthalenedisulfonic acid, sodium salt; 4-Amino-5-hydroxy-2,7-naphthalenedisulfonic acid, monosodium salt (H acid, monosodium salt); 4-Amino-5-hydroxy-2,7-naphthalenedisulfonic acid, potassium salt (H acid, monopotassium salt); 4-Amino-3-hydroxy-1-naphthalenesulfonic acid; 6-Amino-1-naphthol-3-sulfonic acid and its salts; and 8-Amino-1-naphthol-5-sulfonic acid and its salts". United States customs apply MFN rate of 5.8%, Column 2 rate 15.4¢/kg + 39%. Statutory unit of measure: kg. 18 free trade agreement preferential rates are available for this code.