# HS heading 29.35: Sulphonamides > HS heading 29.35 covers sulphonamides. It is in chapter 29 (organic chemicals). It is split into 6 subheadings: 2935.10 (N-Methylperfluorooctane sulphonamide), 2935.20 (N-Ethylperfluorooctane sulphonamide), 2935.30 (N-Ethyl-N-(2-hydroxyethyl) perfluorooctane sulphonamide), 2935.40 (N-(2-Hydroxyethyl)-N-methylperfluorooctane sulphonamide), 2935.50 (other perfluorooctane sulphonamides) and 2935.90 (other). National tariff lines under heading 29.35 are live on border.bot for the United States (19 lines, also used by 1 other country). Source: https://border.bot/hs-codes/2935 Last updated: 11 October 2026 [HS codes](https://border.bot/hs-codes) / [Chapter 29](https://border.bot/hs-codes/29) / [29.35](https://border.bot/hs-codes/2935) ## Key facts - Heading: 29.35 - Description: Sulphonamides - Chapter: 29: Organic chemicals - Subheadings: 6 - Edition: HS2022 ## What this code covers HS heading 29.35 covers sulphonamides. It is split into 6 subheadings: 2935.10 (N-Methylperfluorooctane sulphonamide), 2935.20 (N-Ethylperfluorooctane sulphonamide), 2935.30 (N-Ethyl-N-(2-hydroxyethyl) perfluorooctane sulphonamide), 2935.40 (N-(2-Hydroxyethyl)-N-methylperfluorooctane sulphonamide), 2935.50 (other perfluorooctane sulphonamides) and 2935.90 (other). - [2935.10](https://border.bot/hs-codes/293510) N-Methylperfluorooctane sulphonamide - [2935.20](https://border.bot/hs-codes/293520) N-Ethylperfluorooctane sulphonamide - [2935.30](https://border.bot/hs-codes/293530) N-Ethyl-N-(2-hydroxyethyl) perfluorooctane sulphonamide - [2935.40](https://border.bot/hs-codes/293540) N-(2-Hydroxyethyl)-N-methylperfluorooctane sulphonamide - [2935.50](https://border.bot/hs-codes/293550) Other perfluorooctane sulphonamides - [2935.90](https://border.bot/hs-codes/293590) Other ## What it doesn’t cover Other goods of chapter 29 are classified in its other 41 headings, listed below. - [29.01](https://border.bot/hs-codes/2901) Acyclic hydrocarbons - [29.02](https://border.bot/hs-codes/2902) Cyclic hydrocarbons - [29.03](https://border.bot/hs-codes/2903) Halogenated derivatives of hydrocarbons - [29.04](https://border.bot/hs-codes/2904) Sulphonated, nitrated or nitrosated derivatives of hydrocarbons, whether or not halogenated - [29.05](https://border.bot/hs-codes/2905) Acyclic alcohols and their halogenated, sulphonated, nitrated or nitrosated derivatives - [29.06](https://border.bot/hs-codes/2906) Cyclic alcohols and their halogenated, sulphonated, nitrated or nitrosated derivatives - [29.07](https://border.bot/hs-codes/2907) Phenols; phenol-alcohols - [29.08](https://border.bot/hs-codes/2908) Halogenated, sulphonated, nitrated or nitrosated derivatives of phenols or phenol-alcohols - [29.09](https://border.bot/hs-codes/2909) Ethers, ether-alcohols, ether-phenols, ether-alcohol-phenols, alcohol peroxides, ether peroxides, acetal and hemiacetal peroxides, ketone peroxides (whether or not chemically defined), and their halogenated, sulphonated, nitrated or nitrosated derivatives - [29.10](https://border.bot/hs-codes/2910) Epoxides, epoxyalcohols, epoxyphenols and epoxyethers, with a three-membered ring, and their halogenated, sulphonated, nitrated or nitrosated derivatives - [29.11](https://border.bot/hs-codes/2911) Acetals and hemiacetals, whether or not with other oxygen function, and their halogenated, sulphonated, nitrated or nitrosated derivatives - [29.12](https://border.bot/hs-codes/2912) Aldehydes, whether or not with other oxygen function; cyclic polymers of aldehydes; paraformaldehyde - [29.13](https://border.bot/hs-codes/2913) Halogenated, sulphonated, nitrated or nitrosated derivatives of products of heading 29.12 - [29.14](https://border.bot/hs-codes/2914) Ketones and quinones, whether or not with other oxygen function, and their halogenated, sulphonated, nitrated or nitrosated derivatives - [29.15](https://border.bot/hs-codes/2915) Saturated acyclic monocarboxylic acids and their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulphonated, nitrated or nitrosated derivatives - [29.16](https://border.bot/hs-codes/2916) Unsaturated acyclic monocarboxylic acids, cyclic monocarboxylic acids, their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulphonated, nitrated or nitrosated derivatives - [29.17](https://border.bot/hs-codes/2917) Polycarboxylic acids, their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulphonated, nitrated or nitrosated derivatives - [29.18](https://border.bot/hs-codes/2918) Carboxylic acids with additional oxygen function and their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulphonated, nitrated or nitrosated derivatives - [29.19](https://border.bot/hs-codes/2919) Phosphoric esters and their salts, including lactophosphates; their halogenated, sulphonated, nitrated or nitrosated derivatives - [29.20](https://border.bot/hs-codes/2920) Esters of other inorganic acids of non-metals (excluding esters of hydrogen halides) and their salts; their halogenated, sulphonated, nitrated or nitrosated derivatives - [29.21](https://border.bot/hs-codes/2921) Amine-function compounds - [29.22](https://border.bot/hs-codes/2922) Oxygen-function amino-compounds - [29.23](https://border.bot/hs-codes/2923) Quaternary ammonium salts and hydroxides; lecithins and other phosphoaminolipids, whether or not chemically defined - [29.24](https://border.bot/hs-codes/2924) Carboxyamide-function compounds; amide-function compounds of carbonic acid - [29.25](https://border.bot/hs-codes/2925) Carboxyimide-function compounds (including saccharin and its salts) and imine-function compounds - [29.26](https://border.bot/hs-codes/2926) Nitrile-function compounds - [29.27](https://border.bot/hs-codes/2927) Diazo-, azo- or azoxy-compounds - [29.28](https://border.bot/hs-codes/2928) Organic derivatives of hydrazine or of hydroxylamine - [29.29](https://border.bot/hs-codes/2929) Compounds with other nitrogen function - [29.30](https://border.bot/hs-codes/2930) Organo-sulphur compounds - [29.31](https://border.bot/hs-codes/2931) Other organo-inorganic compounds - [29.32](https://border.bot/hs-codes/2932) Heterocyclic compounds with oxygen hetero-atom(s) only - [29.33](https://border.bot/hs-codes/2933) Heterocyclic compounds with nitrogen hetero-atom(s) only - [29.34](https://border.bot/hs-codes/2934) Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds - [29.36](https://border.bot/hs-codes/2936) Provitamins and vitamins, natural or reproduced by synthesis (including natural concentrates), derivatives thereof used primarily as vitamins, and intermixtures of the foregoing, whether or not in any solvent - [29.37](https://border.bot/hs-codes/2937) Hormones, prostaglandins, thromboxanes and leukotrienes, natural or reproduced by synthesis; derivatives and structural analogues thereof, including chain modified polypeptides, used primarily as hormones - [29.38](https://border.bot/hs-codes/2938) Glycosides, natural or reproduced by synthesis, and their salts, ethers, esters and other derivatives - [29.39](https://border.bot/hs-codes/2939) Alkaloids, natural or reproduced by synthesis, and their salts, ethers, esters and other derivatives - [29.40](https://border.bot/hs-codes/2940) Sugars, chemically pure, other than sucrose, lactose, maltose, glucose and fructose; sugar ethers, sugar acetals and sugar esters, and their salts, other than products of heading 2937, 2938 or 2939 - [29.41](https://border.bot/hs-codes/2941) Antibiotics - [29.42](https://border.bot/hs-codes/2942) Other organic compounds ## How it is structured Heading 29.35 is one of 42 headings in chapter 29. Its first two digits, 29, are the chapter; the next two, 35, number the heading within it. Its subheadings add two more digits (2935.10, 2935.20, 2935.30). ## In other countries National tariff lines under heading 29.35 are live on border.bot for the United States (19 lines, also used by 1 other country). - [United States](https://border.bot/countries/united-states/hs-codes/29): 19 lines, used by 1 other country - Previous heading: [29.34](https://border.bot/hs-codes/2934) Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds - Next heading: [29.36](https://border.bot/hs-codes/2936) Provitamins and vitamins, natural or reproduced by synthesis (including natural concentrates), derivatives thereof used primarily as vitamins, and intermixtures of the foregoing, whether or not in any solvent ## Frequently asked questions ### What does HS heading 29.35 cover? HS heading 29.35 covers sulphonamides. ### Which chapter is HS heading 29.35 in? HS heading 29.35 is in chapter 29 (organic chemicals). ### How many subheadings does HS heading 29.35 have? HS heading 29.35 has 6 subheadings: 2935.10 (N-Methylperfluorooctane sulphonamide), 2935.20 (N-Ethylperfluorooctane sulphonamide), 2935.30 (N-Ethyl-N-(2-hydroxyethyl) perfluorooctane sulphonamide), 2935.40 (N-(2-Hydroxyethyl)-N-methylperfluorooctane sulphonamide), 2935.50 (other perfluorooctane sulphonamides) and 2935.90 (other). ### Which countries’ tariffs list national lines under HS heading 29.35? National tariff lines under heading 29.35 are live on border.bot for the United States (19 lines, also used by 1 other country). ## Sources and updates The Harmonized System legal text comes from border.bot release 2 (edition HS 2022), imported from a file, and has been live since 11 October 2026. This page was last updated on 11 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. Machine-readable: https://border.bot/hs-codes/2935.json