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2922.21.10.00/H Acid Monosodium Salt (4-Amino-5-hydroxy-2,7-naphthalenedisulfonic acid, monosodium salt)/Mexico

H Acid Monosodium Salt (4-Amino-5-hydroxy-2,7-naphthalenedisulfonic acid, monosodium salt) from Mexico

H Acid monosodium salt is a key dye intermediate specifically enumerated under HTS 2922.21.1000 for use in manufacturing direct, reactive, and acid dyes. This salt form improves solubility and handling compared to the free acid. It contains both amino and hydroxy functions with naphthalene sulfonic acid structure as defined in chapter notes.

Duty Rate — Mexico → United States

15.8%

Rate breakdown

9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
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Import Tips

• Provide sodium content analysis to confirm salt form versus free acid classification

• Declare as UN 3265 if solution exceeds 10% concentration; dry powder typically UN 3077

• Avoid retail packaging that might trigger Chapter 32 classification for dye preparations

H Acid Monosodium Salt (4-Amino-5-hydroxy-2,7-naphthalenedisulfonic acid, monosodium salt) from Mexico — Import Duty Rate | HTS 2922.21.10.00