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2921.45.90.90/4-Amino-5-hydroxynaphthalene-2,7-disulfonic Acid (H Acid)/Germany

4-Amino-5-hydroxynaphthalene-2,7-disulfonic Acid (H Acid) from Germany

H acid is a multi-substituted 1-naphthylamine derivative essential for direct and reactive dyes in cotton dyeing. Classified in HTS 2921.45.90.90 as 'other' α-naphthylamine derivative, the amine group defines its place despite phenolic and sulfonic functions. Chapter 29 classification rules ensure amine-function precedence.

Duty Rate — Germany → United States

10%

Rate breakdown

9903.05.3910%Section 301 (forced labor) — European Union member state (col1 rate < 10 percent): MFN < 10% → total duty capped at 10%
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Import Tips

• Include chromatograms showing >95% purity; multi-functional nature invites classification challenges

• Declare as 'amine-function compound' explicitly on commercial invoice with structure diagram

• For EU-sourced material, verify REACH compliance as it affects US import documentation

4-Amino-5-hydroxynaphthalene-2,7-disulfonic Acid (H Acid) from Germany — Import Duty Rate | HTS 2921.45.90.90