# United States tariff line 2930.90.49.50: Other > In the United States tariff, line 2930.90.49.50 covers acids. The general (MFN) duty rate is 4.2%. It falls under HS subheading 2930.90 in heading 29.30 (chapter 29). Source: https://border.bot/countries/united-states/hs-codes/2930904950 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) / [2930.90](https://border.bot/countries/united-states/hs-codes/293090) / [2930.90.49.50](https://border.bot/countries/united-states/hs-codes/2930904950) ## Key facts - Tariff line: 2930.90.49.50 - Covers: Acids - Duty (MFN): 4.2% - 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: [2930.90](https://border.bot/hs-codes/293090) ## What this line covers In the United States tariff, line 2930.90.49.50 covers acids. Its legal text is “Other”, read under “Other”, “Other”, “Other”, “Acids” and “Other”. Products commonly classified here include Thiourea dioxide (Amino(imino)methanesulfinic acid) (CAS No. 1758-73-2) and Thioglycolic acid (Sulfanylacetic acid) (CAS No. 68-11-1) (border.bot’s search keywords, not legal text). ## How it is structured It falls under HS subheading 2930.90 in heading 29.30 (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 29.30: Organo-sulfur compounds - Subheading 2930.90: Other - Within the subheading: Other - Within the subheading: Other - Within the subheading: Acids - Within the subheading: Other - Line 2930.90.49.50: Other ## Duty The general (MFN) duty rate is 4.2%. The rate is published on 2930.90.49. 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 2930.90 yet. - [The Harmonized System text for 2930.90](https://border.bot/hs-codes/293090) ## Other lines under 2930.90 - [2930.90.10.00](https://border.bot/countries/united-states/hs-codes/2930901000) Pesticides - [2930.90.24.00](https://border.bot/countries/united-states/hs-codes/2930902400) N-Cyclohexylthiophthalimide - [2930.90.26.00](https://border.bot/countries/united-states/hs-codes/2930902600) 3-(4'-Aminobenzamido)phenyl-ß-hydroxy- ethylsulfone; 2-[(4-Aminophenyl)sulfonyl] ethanol, hydrogen sulfate ester; Diphenylthiourea;N,N'-(Dithiodi-2,1-phenylene) bisbenzamide; Pentachlorothiophenol; and 4,4'-Thiodiphenyl cyanate - [2930.90.29.00](https://border.bot/countries/united-states/hs-codes/2930902900) Other - [2930.90.30.00](https://border.bot/countries/united-states/hs-codes/2930903000) Thiocyanates, thiurams and isothiocyanates - [2930.90.42.00](https://border.bot/countries/united-states/hs-codes/2930904200) O,O-Dimethyl-S-methyl carbamoyl- methyl phosphorodithioate; and Malathion - [2930.90.43.10](https://border.bot/countries/united-states/hs-codes/2930904310) O-Ethyl-S-phenylethylphosphono- thiolothionate (fonofos) - [2930.90.43.15](https://border.bot/countries/united-states/hs-codes/2930904315) Phorate (ISO) - [2930.90.43.20](https://border.bot/countries/united-states/hs-codes/2930904320) Compounds containing a phosphorus atom to which is bonded one methyl, ethyl, n-propyl or isopropyl group, but no other carbon atoms - [2930.90.43.30](https://border.bot/countries/united-states/hs-codes/2930904330) Terbufos (ISO) - [2930.90.43.90](https://border.bot/countries/united-states/hs-codes/2930904390) Other - [2930.90.46.00](https://border.bot/countries/united-states/hs-codes/2930904600) dl-Hydroxy analogue of dl-methionine - [2930.90.49.10](https://border.bot/countries/united-states/hs-codes/2930904910) Thioglycolic acid - [2930.90.49.40](https://border.bot/countries/united-states/hs-codes/2930904940) Acetylcysteine (INN) and its salts - [2930.90.49.45](https://border.bot/countries/united-states/hs-codes/2930904945) Other - [2930.90.71.00](https://border.bot/countries/united-states/hs-codes/2930907100) Dibutylthiourea - [2930.90.92.08](https://border.bot/countries/united-states/hs-codes/2930909208) O,O-Diethyl S-[2-(diethylamino)- ethyl] phosphorothioate and its alkylated or protonated salts; and Thiodiglycol (INN) (bis(2-hydroxy- ethyl) sulfide) - [2930.90.92.10](https://border.bot/countries/united-states/hs-codes/2930909210) Cysteine hydrochloride - [2930.90.92.12](https://border.bot/countries/united-states/hs-codes/2930909212) 2-Ethylhexyl mercaptoacetate - [2930.90.92.22](https://border.bot/countries/united-states/hs-codes/2930909222) N,N-Dialkyl (methyl, ethyl, n-propyl or isopropyl) aminoethane-2-thiols and their protonated salts, except for 2-(N,N- dimethylamino)ethanethiol and 2-(N,N- diethylamino)ethanethiol - [2930.90.92.25](https://border.bot/countries/united-states/hs-codes/2930909225) Other compounds containing a phosphorus atom to which is bonded one methyl, ethyl, n-propyl or isopropyl group, but no other carbon atoms - [2930.90.92.31](https://border.bot/countries/united-states/hs-codes/2930909231) Products used principally for rubber processing - [2930.90.92.35](https://border.bot/countries/united-states/hs-codes/2930909235) Drugs - [2930.90.92.40](https://border.bot/countries/united-states/hs-codes/2930909240) Dimethyl sulfide (DMS) (CAS No. 75-18-3) - [2930.90.92.55](https://border.bot/countries/united-states/hs-codes/2930909255) Other - Previous line: [2930.90.49.45](https://border.bot/countries/united-states/hs-codes/2930904945) Other - Next line: [2930.90.71.00](https://border.bot/countries/united-states/hs-codes/2930907100) Dibutylthiourea ## Frequently asked questions ### What does tariff line 2930.90.49.50 cover in the United States tariff? In the United States tariff, line 2930.90.49.50 covers acids. ### What is the general (MFN) duty on 2930.90.49.50 in the United States? The general (MFN) duty rate is 4.2%. The rate is published on 2930.90.49. ### Which preferential rates apply to 2930.90.49.50? 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/2930904950.json