2922.21 · Aminohydroxynaphthalenesulfonic acids and their salts:
This is a category heading rather than a rate line — pick one of the codes below to see its full duty stack.
Subordinate codes (4)
| Code | Description |
|---|---|
| 2922.21.10.00 | 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 |
| 2922.21.25.00 | 1-Amino-8-hydroxy-4,6-naphthalenedisulfonic acid, monosodium salt |
| 2922.21.40.00 | Products described in additional U.S. note 3 to section VI |
| 2922.21.50.00 | Other |
Frequently asked
- What does 2922.21 cover?
- Aminohydroxynaphthalenesulfonic acids and their salts:. This is a heading-level category with several subordinate codes — open one to see its full duty breakdown.
- Where does this data come from?
- Codes and MFN base rates come from the full USITC HTS 2026 Rev.11 export. Section 301/232/122 surcharge mappings are approximated pending code-level review. Every rate carries a source_url and effective_from, so you can trace it back to the controlling notice.