# HTS 2923: Quaternary ammonium salts and hydroxides; lecithins and other phosphoaminolipids, whether or not chemically defined:

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Source: [2026 HTS Revision 21 (October 9, 2026)](https://hts.usitc.gov/search?query=2923). Additional duties by country of origin may apply; estimate a shipment's full duty with the tariff calculator: https://geopax.app/tariffs/calculator

## 2923: Quaternary ammonium salts and hydroxides; lecithins and other phosphoaminolipids, whether or not chemically defined:

| Code | Description | General | Special | Column 2 | Units |
| --- | --- | --- | --- | --- | --- |
| 2923 | Quaternary ammonium salts and hydroxides; lecithins and other phosphoaminolipids, whether or not chemically defined: |  |  |  |  |
| 2923.10.00.00 |   Choline and its salts | 3.7% | Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG) | 25% | kg |
| 2923.20 |   Lecithins and other phosphoaminolipids: |  |  |  |  |
| 2923.20.10.00 |     Purified egg phospholipids, pharmaceutical grade meeting requirements of the U.S. Food and Drug Administration, for use in intravenous fat emulsion | Free |  | 16.5¢/kg + 30% | kg |
| 2923.20.20 |     Other | 5% | Free (A*,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG) | 33.4% |  |
| 2923.20.20.10 |       Certified organic lecithins | 5% | Free (A*,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG) | 33.4% | kg |
| 2923.20.20.50 |       Other | 5% | Free (A*,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG) | 33.4% | kg |
| 2923.30.00.00 |   Tetraethylammonium perfluorooctane sulfonate | 6.2% | Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 36% | kg |
| 2923.40.00.00 |   Didecylmethylammonium perfluorooctane sulfonate | 6.2% | Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 36% | kg |
| 2923.90.01.00 |   Other | 6.2% | Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 36% | kg |