# HTS 2833: Sulfates; alums; peroxosulfates (persulfates):

https://geopax.app/tariffs/catalog/28/2833

Source: [2026 HTS Revision 21 (October 9, 2026)](https://hts.usitc.gov/search?query=2833). Additional duties by country of origin may apply; estimate a shipment's full duty with the tariff calculator: https://geopax.app/tariffs/calculator

## 2833: Sulfates; alums; peroxosulfates (persulfates):

| Code | Description | General | Special | Column 2 | Units |
| --- | --- | --- | --- | --- | --- |
| 2833 | Sulfates; alums; peroxosulfates (persulfates): |  |  |  |  |
|  |   Sodium sulfates: |  |  |  |  |
| 2833.11 |     Disodium sulfate: |  |  |  |  |
| 2833.11.10.00 |       Salt cake | Free |  | Free | t |
| 2833.11.50 |       Other | 0.4% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 3.6% |  |
| 2833.11.50.10 |         Anhydrous | 0.4% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 3.6% | t |
| 2833.11.50.50 |         Other | 0.4% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 3.6% | t |
| 2833.19.00.00 |     Other | Free |  | Free | kg |
|  |   Other sulfates: |  |  |  |  |
| 2833.21.00.00 |     Of magnesium | 3.7% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 20% | kg |
| 2833.22.00.00 |     Of aluminum | Free |  | 10% | kg |
| 2833.24.00.00 |     Of nickel | 3.2% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 25% | kg |
| 2833.25.00.00 |     Of copper | 1.4% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 5% | kg, Cu kg |
| 2833.27.00.00 |     Of barium | 0.6% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 4.2% | kg |
| 2833.29 |     Other: |  |  |  |  |
| 2833.29.10.00 |       Of cobalt | 1.4% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 6.5% | kg |
| 2833.29.20.00 |       Of iron | Free |  | Free | kg |
| 2833.29.30.00 |       Of vanadium | 5.5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 40% | kg, V kg |
| 2833.29.40.00 |       Of chromium | 3.7% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 25% | kg |
| 2833.29.45.00 |       Of zinc | 1.6% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 8% | kg |
| 2833.29.51 |       Other | 3.7% | Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG) | 30% |  |
| 2833.29.51.10 |         Of manganese | 3.7% | Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG) | 30% | kg |
| 2833.29.51.90 |         Other | 3.7% | Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG) | 30% | kg |
| 2833.30.00.00 |   Alums | 1.6% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 25% | kg |
| 2833.40 |   Peroxosulfates (persulfates): |  |  |  |  |
| 2833.40.20.00 |     Of sodium | 3.7% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 25% | kg |
| 2833.40.60 |     Other | 3.1% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 25% |  |
| 2833.40.60.10 |       Of potassium | 3.1% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 25% | kg |
| 2833.40.60.20 |       Of ammonium | 3.1% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 25% | kg |
| 2833.40.60.50 |       Other | 3.1% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 25% | kg |