# United States tariff line 2933.79.85.00: Other > In the United States tariff, line 2933.79.85.00 covers lactams, other lactams. The general (MFN) duty rate is 6.5%. It falls under HS subheading 2933.79 in heading 29.33 (chapter 29). Source: https://border.bot/countries/united-states/hs-codes/2933798500 Last updated: 9 October 2026 [Countries](https://border.bot/countries) / [United States](https://border.bot/countries/united-states) / [Chapter 29](https://border.bot/countries/united-states/hs-codes/29) / [2933.79](https://border.bot/countries/united-states/hs-codes/293379) / [2933.79.85.00](https://border.bot/countries/united-states/hs-codes/2933798500) ## Key facts - Tariff line: 2933.79.85.00 - Covers: Lactams, other lactams - Duty (MFN): 6.5% - 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: [2933.79](https://border.bot/hs-codes/293379) ## What this line covers In the United States tariff, line 2933.79.85.00 covers lactams, other lactams. Its legal text is “Other”, read under “Lactams”, “Other lactams” and “Other”. ## How it is structured It falls under HS subheading 2933.79 in heading 29.33 (chapter 29). The first six digits are the Harmonized System code; the 4 digits after them are added by the United States tariff. - Chapter 29: Organic chemicals - Heading 29.33: Heterocyclic compounds with nitrogen hetero-atom(s) only - Subheading 2933.79: Lactams - Within the subheading: Other lactams - Within the subheading: Other - Line 2933.79.85.00: Other ## Duty The general (MFN) duty rate is 6.5%. 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 2933.79 yet. - [The Harmonized System text for 2933.79](https://border.bot/hs-codes/293379) ## Other lines under 2933.79 - [2933.79.04.00](https://border.bot/countries/united-states/hs-codes/2933790400) 2,5-Dihydro-3,6-diphenylpyrrolo-(3,4-c)- pyrrole-1,4-dione - [2933.79.08.00](https://border.bot/countries/united-states/hs-codes/2933790800) Products described in additional U.S. note 3 to section VI - [2933.79.15.00](https://border.bot/countries/united-states/hs-codes/2933791500) Other - [2933.79.20.00](https://border.bot/countries/united-states/hs-codes/2933792000) N-Methyl-2-pyrrolidone; and 2-Pyrrolidone - [2933.79.30.00](https://border.bot/countries/united-states/hs-codes/2933793000) N-Vinyl-2-pyrrolidone, monomer - [2933.79.40.00](https://border.bot/countries/united-states/hs-codes/2933794000) 12-Aminododecanoic acid lactam - Previous line: [2933.79.40.00](https://border.bot/countries/united-states/hs-codes/2933794000) 12-Aminododecanoic acid lactam - Next line: [2933.91.00.10](https://border.bot/countries/united-states/hs-codes/2933910010) Lorazepam (INN); salts thereof ## Frequently asked questions ### What does tariff line 2933.79.85.00 cover in the United States tariff? In the United States tariff, line 2933.79.85.00 covers lactams, other lactams. ### What is the general (MFN) duty on 2933.79.85.00 in the United States? The general (MFN) duty rate is 6.5%. ### Which preferential rates apply to 2933.79.85.00? 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/2933798500.json