2922.21.10.00

HS 编码 2922.21.10.00（第 29 章「有机化学品」；品目 2922「含氧氨基化合物」；子目 292221「氨基羟基萘磺酸及其盐」）在美国税则中对应"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"。美国海关对该编码商品征收最惠国税率 (MFN) 5.8%、第二栏税率 15.4¢/kg + 39%。法定计量单位为kg。目前有 18 项自贸协定优惠税率可适用于该编码。