2918Carboxylic acids with additional oxygen function and their anhydrides
HTS Code 2918 covers any article best defined as Products of the Chemical or Allied IndustriesOrganic chemicalsCarboxylic acids with additional oxygen function and their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulfonated, nitrated or nitrosated derivatives: in the Harmonized Tariff Schedule — covering 16 sub-classifications.
Tariff updates
Recent US tariff actions that name 2918 or its heading.
- Oct 16, 2026 · CBP guidanceCBP issues HSU 2625 with Section 232 pharmaceutical updates and CPSC flag changes
- Dec 18, 2025 · PublishedUS cuts reciprocal tariff on Swiss and Liechtenstein goods to 15% all-in, exempts certain products
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If a new 10% tariff were added
Relevant HTS Notes
Official USITC notes that may affect classification under HTS 2918.
Search CROSS Rulings for HTS 2918
See how Customs classified similar products. CBP's CROSS database holds the classification rulings that cite 2918.
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What does HTS code 2918 cover?
HTS code 2918 covers carboxylic acids with additional oxygen function and their anhydrides (Carboxylic acids with additional oxygen function and their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulfonated, nitrated or nitrosated derivatives:), classified under Chapter 29 (Organic chemicals) in the US Harmonized Tariff Schedule. There are 16 more specific sub-classifications under this code.
Primary Sources
The official documents behind the rates and tariffs on this page. Duties are worked out from them; check the legal text before you file.