Chapter 29 · Organic chemicals · Section 6
HS Code 2922.21
Aminohydroxynaphthalenesulfonic acids and their salts
Heading 2922: Oxygen-function amino-compounds
US HTS + UK Tariff v4.0.1596 · updated 2026-09-10 · sources
United States - HTS lines under 2922.21
Source: official Harmonized Tariff Schedule (USITC). "General" is the normal-trade-relations rate; "Special" lists preference programs; "Other" is the column-2 rate. Additional Section 232/301 duties may apply on top.
| HTS code | Description | General | Special | Other | Unit |
|---|---|---|---|---|---|
| 2922.21.10 |
Aminohydroxynaphthalenesulfonic acids and their salts > 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 |
5.8% | Free (A+,AU,BH,CL,CO,D,E,IL,JO,KR,L,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 39% | kg |
| 2922.21.25 |
Aminohydroxynaphthalenesulfonic acids and their salts > 1-Amino-8-hydroxy-4,6-naphthalenedisulfonic acid, monosodium salt |
Free | - | 15.4¢/kg + 50% | kg |
| 2922.21.40 |
Aminohydroxynaphthalenesulfonic acids and their salts > Other > Products described in additional U.S. note 3 to section VI |
6.5% | Free (A+,AU,BH,CL,CO,D,E,IL,JO,KR,L,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 50% | kg |
| 2922.21.50 |
Aminohydroxynaphthalenesulfonic acids and their salts > Other > Other |
6.5% | Free (A+,AU,BH,CL,CO,D,E,IL,JO,KR,L,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 50% | kg |
Estimate the US duty runs in your browser · no caps
Enter the customs value (and quantity, when a rate is per-unit) to estimate the general-rate duty per HTS line. Estimates exclude Section 232/301 surcharges, MPF/HMF and fees. Not a customs ruling.
European Union - CN codes under 2922.21
Source: EU Combined Nomenclature (Eurostat, © European Union, reused per Decision 2011/833/EU). Duty rates and measures live in TARIC; each code links to the official consultation.
| CN code | Description | |
|---|---|---|
| 2922 21 00 | Aminohydroxynaphthalenesulphonic acids and their salts | EU duty (TARIC) → |
United Kingdom - commodity codes under 2922.21
Source: UK Integrated Online Tariff (Open Government Licence v3.0). Declarable 10-digit codes go on the customs declaration; check the official page for the current duty and VAT measures.
| Commodity code | Description | |
|---|---|---|
| 2922 21 00 00 | Aminohydroxynaphthalenesulphonic acids and their salts | UK duty & VAT → |
| 2922 21 00 10 | 2-Amino-5-hydroxynaphthalene-1,7-disulphonic acid (CAS RN 6535-70-2) | UK duty & VAT → |
| 2922 21 00 30 | 6-Amino-4-hydroxynaphthalene-2-sulphonic acid (CAS RN 90-51-7) | UK duty & VAT → |
| 2922 21 00 40 | 7-Amino-4-hydroxynaphthalene-2-sulphonic acid (CAS RN 87-02-5) | UK duty & VAT → |
| 2922 21 00 50 | Sodium hydrogen 4-amino-5-hydroxynaphthalene-2,7-disulphonate (CAS RN 5460-09-3) | UK duty & VAT → |
| 2922 21 00 60 | 4-Amino-5-hydroxynaphthalene-2,7-disulphonic acid with a purity by weight of 80 % or more (CAS RN 90-20-0) | UK duty & VAT → |
| 2922 21 00 90 | Other | UK duty & VAT → |
Other subheadings in 2922
Sources: U.S. International Trade Commission, Harmonized Tariff Schedule (public domain) · EU Combined Nomenclature © European Union, Eurostat (Decision 2011/833/EU) · UK Integrated Online Tariff, contains public sector information licensed under the Open Government Licence v3.0. Data refreshed weekly. Details on About & Data Sources.