# HTS 2831: Dithionites and sulfoxylates:

https://geopax.app/tariffs/catalog/28/2831

Source: [2026 HTS Revision 21 (October 9, 2026)](https://hts.usitc.gov/search?query=2831). Additional duties by country of origin may apply; estimate a shipment's full duty with the tariff calculator: https://geopax.app/tariffs/calculator

## 2831: Dithionites and sulfoxylates:

| Code | Description | General | Special | Column 2 | Units |
| --- | --- | --- | --- | --- | --- |
| 2831 | Dithionites and sulfoxylates: |  |  |  |  |
| 2831.10 |   Of sodium: |  |  |  |  |
| 2831.10.10.00 |     Sodium formaldehyde sulfoxylate | Free |  | 35% | kg |
| 2831.10.50.00 |     Other | 5.5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 35% | kg |
| 2831.90.00.00 |   Other | 5.5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 35% | kg |