# HTS 3815: Reaction initiators, reaction accelerators and catalytic preparations, not elsewhere specified or included:

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Source: [2026 HTS Revision 21 (October 9, 2026)](https://hts.usitc.gov/search?query=3815). Additional duties by country of origin may apply; estimate a shipment's full duty with the tariff calculator: https://geopax.app/tariffs/calculator

## 3815: Reaction initiators, reaction accelerators and catalytic preparations, not elsewhere specified or included:

| Code | Description | General | Special | Column 2 | Units |
| --- | --- | --- | --- | --- | --- |
| 3815 | Reaction initiators, reaction accelerators and catalytic preparations, not elsewhere specified or included: |  |  |  |  |
|  |   Supported catalysts: |  |  |  |  |
| 3815.11.00.00 |     With nickel or nickel compounds as the active substance | Free |  | 25% | kg |
| 3815.12.00 |     With precious metal or precious metal compounds as the active substance | Free |  | 25% |  |
| 3815.12.00.10 |       With platinum group metals as the active substance | Free |  | 25% | kg |
| 3815.12.00.90 |       Other | Free |  | 25% | kg |
| 3815.19.00.00 |     Other | Free |  | 25% | kg |
| 3815.90 |   Other: |  |  |  |  |
|  |     Consisting wholly of inorganic substances: |  |  |  |  |
| 3815.90.10.00 |       Of bismuth, of tungsten or of vanadium | 6.5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 40% | kg |
| 3815.90.20.00 |       Of mercury or of molybdenum | 2.8% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 18% | kg |
| 3815.90.30.00 |       Other | Free |  | 25% | kg |
| 3815.90.50.00 |     Other | 5% | Free (A+,AU,BH,CL,CO,D, E,IL, JO,KR,MA,OM,P, PA,PE,S,SG) | 25% | kg |