# United States tariff line 2825.90.90.00: Other > In the United States tariff, line 2825.90.90.00 covers hydrazine and hydroxylamine and their inorganic salts; other inorganic bases; other metal oxides, hydroxides and peroxides. The general (MFN) duty rate is 3.7%. It falls under HS subheading 2825.90 in heading 28.25 (chapter 28). Source: https://border.bot/countries/united-states/hs-codes/2825909000 Last updated: 9 October 2026 [Countries](https://border.bot/countries) / [United States](https://border.bot/countries/united-states) / [Chapter 28](https://border.bot/countries/united-states/hs-codes/28) / [2825.90](https://border.bot/countries/united-states/hs-codes/282590) / [2825.90.90.00](https://border.bot/countries/united-states/hs-codes/2825909000) ## Key facts - Tariff line: 2825.90.90.00 - Covers: Hydrazine and hydroxylamine and their inorganic salts; other inorganic bases; other metal oxides, hydroxides and peroxides - Duty (MFN): 3.7% - Preferential rates: From free (17 programmes or origins) - Additional duties: None recorded - Restrictions: None recorded - Tariff: [United States](https://border.bot/countries/united-states) - HS subheading: [2825.90](https://border.bot/hs-codes/282590) ## What this line covers In the United States tariff, line 2825.90.90.00 covers hydrazine and hydroxylamine and their inorganic salts; other inorganic bases; other metal oxides, hydroxides and peroxides. Its legal text is “Other”, read under “Other”. ## How it is structured It falls under HS subheading 2825.90 in heading 28.25 (chapter 28). The first six digits are the Harmonized System code; the 4 digits after them are added by the United States tariff. - Chapter 28: Inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes - Heading 28.25: Hydrazine and hydroxylamine and their inorganic salts; other inorganic bases; other metal oxides, hydroxides and peroxides - Subheading 2825.90: Other - Line 2825.90.90.00: Other ## Duty The general (MFN) duty rate is 3.7%. Duty-free entry applies to goods that qualify under 16 programmes, and to goods from a group of origins (origin group A*). - Free: a group of origins (origin group A*) (A*) - Free: United States-Australia Free Trade Agreement (AU) - Free: United States-Bahrain Free Trade Agreement Implementation Act (BH) - Free: United States-Chile Free Trade Agreement (CL) - Free: United States-Colombia Trade Promotion Agreement Implementation Act (CO) - Free: African Growth and Opportunity Act (D) - Free: Caribbean Basin Economic Recovery Act (E) - Free: United States-Israel Free Trade Area (IL) - Free: United States-Jordan Free Trade Area Implementation Act (JO) - Free: United States-Korea Free Trade Agreement Implementation Act (KR) - Free: United States-Morocco Free Trade Agreement Implementation Act (MA) - Free: United States-Oman Free Trade Agreement Implementation Act (OM) - Free: Dominican Republic-Central America-United States Free Trade Agreement (P) - Free: United States-Panama Trade Promotion Agreement Implementation Act (PA) - Free: United States-Peru Trade Promotion Agreement Implementation Act (PE) - Free: United States-Mexico-Canada Agreement (S) - Free: United States-Singapore Free Trade Agreement (SG) ## In other countries No other national tariff on border.bot has live lines under 2825.90 yet. - [The Harmonized System text for 2825.90](https://border.bot/hs-codes/282590) ## Other lines under 2825.90 - [2825.90.10.00](https://border.bot/countries/united-states/hs-codes/2825901000) Beryllium oxide and hydroxide - [2825.90.15.00](https://border.bot/countries/united-states/hs-codes/2825901500) Niobium oxide - [2825.90.20.00](https://border.bot/countries/united-states/hs-codes/2825902000) Tin oxides - [2825.90.30.00](https://border.bot/countries/united-states/hs-codes/2825903000) Tungsten oxides - [2825.90.75.00](https://border.bot/countries/united-states/hs-codes/2825907500) Cadmium oxide - Previous line: [2825.90.75.00](https://border.bot/countries/united-states/hs-codes/2825907500) Cadmium oxide - Next line: [2826.12.00.00](https://border.bot/countries/united-states/hs-codes/2826120000) Of aluminum ## Frequently asked questions ### What does tariff line 2825.90.90.00 cover in the United States tariff? In the United States tariff, line 2825.90.90.00 covers hydrazine and hydroxylamine and their inorganic salts; other inorganic bases; other metal oxides, hydroxides and peroxides. ### What is the general (MFN) duty on 2825.90.90.00 in the United States? The general (MFN) duty rate is 3.7%. ### Which preferential rates apply to 2825.90.90.00? Duty-free entry applies to goods that qualify under 16 programmes: the United States-Australia Free Trade Agreement, the United States-Bahrain Free Trade Agreement Implementation Act, the United States-Chile Free Trade Agreement, the United States-Colombia Trade Promotion Agreement Implementation Act, African Growth and Opportunity Act, Caribbean Basin Economic Recovery Act, the United States-Israel Free Trade Area, the United States-Jordan Free Trade Area Implementation Act, the United States-Korea Free Trade Agreement Implementation Act, the United States-Morocco Free Trade Agreement Implementation Act, the United States-Oman Free Trade Agreement Implementation Act, the Dominican Republic-Central America-United States Free Trade Agreement, the United States-Panama Trade Promotion Agreement Implementation Act, the United States-Peru Trade Promotion Agreement Implementation Act, the United States-Mexico-Canada Agreement and the United States-Singapore Free Trade Agreement, and to goods from a group of origins (origin group A*). ## Sources and updates The tariff lines for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026. The duty rates for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026. The trade programmes for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026. This page was last updated on 9 October 2026. Guidance from published tariff data, not a binding ruling. For a decision customs must follow, apply to the destination’s customs authority for a binding tariff ruling. Official source files: - https://hts.usitc.gov/reststop/exportList?from=0000000000&to=9999999999&format=CSV&styles=false Machine-readable: https://border.bot/countries/united-states/hs-codes/2825909000.json