HTS US: 2935.XX.XXXX
Description
Heading 2935 covers sulfonamides, a class of organic compounds characterized by the presence of the sulfonamide functional group. These compounds have diverse applications in pharmaceuticals, agrochemicals, and industrial processes. The heading specifically addresses various perfluorooctane sulfonamides as well as other sulfonamide derivatives with distinct chemical structures.
Key subclasses include N-substituted perfluorooctane sulfonamides, which are fluorinated chemicals often used for their surfactant and stain-resistant properties, as well as other aromatic and aliphatic sulfonamides used in medicinal and agricultural products.
Code Hierarchy
- Section VI: Products of the Chemical or Allied Industries (Chapters 28-38)
- Chapter 29: Organic Chemicals
- Heading 2935: Sulfonamides
- US HTS Code (10-digit):
2935.XX.XXXX– Specific codes detail precise chemical compounds and their derivatives within the sulfonamide class.
Detailed Breakdown of Subheadings
The heading 2935 is subdivided into precise subheadings that classify sulfonamides by their chemical structure and specific substituents. Below is a comprehensive table covering the full range of 10-digit HTS codes under 2935:
| HTS Code | Description |
|---|---|
| 2935.10.00.00 | N-Methyl perfluorooctane sulfonamide |
| 2935.20.00.00 | N-Ethyl perfluorooctane sulfonamide |
| 2935.30.00.00 | N-Ethyl -N-(2-hydroxyethyl)perfluorooctane sulfonamide |
| 2935.40.00.00 | N-(2-hydroxyethyl)-N-methyl perfluorooctane sulfonamide |
| 2935.50.00.00 | Other perfluorooctane sulfonamides |
| 2935.90.06.00 | 4-Amino-6-chloro-m-benzenedisulfonamide and Methyl-4-aminobenzenesulfonylcarbamate (Asulam) |
| 2935.90.10.00 | 2-Amino-N-ethylbenzenesulfonanilide; 5-Amino-α,α,α-trifluorotoluene-2,4-disulfonamide; Benzenesulfonamide; Benzenesulfonyl hydrazide; 2-Chloro-4-amino-5-hydroxybenzenesulfonamide; 2,5-Dimethoxysulfanilanilide; and Metanilamide |
| 2935.90.13.00 | (5‐[2‐Chloro‐4‐(trifluoromethyl)phenoxy]‐N‐(methylsulfonyl)‐2‐nitrobenzamide) (Fomesafen); N‐(2,6‐Dichloro‐3‐methylphenyl)‐5‐amino‐1,3,4‐triazole‐2‐sulfonamide; 2,4‐Dichloro‐5‐sulfamoylbenzoic acid; N‐Ethyl‐o‐toluenesulfonamide; N‐Ethyl‐p‐toluenesulfonamide; 7-(Hexadecylsulfonylamino)‐1H‐indole; Methyl 5‐{[(4,6‐dimethoxy‐2‐pyrimidinyl)amino]‐carbonylaminosulfonyl}‐3‐chloro‐1‐methyl‐1H‐pyrazole‐4‐carboxylate (Halosulfuron methyl); and Mixtures of ortho‐ and para-toluenesulfonamides |
| 2935.90.15.00 | o-Toluenesulfonamide |
| 2935.90.20.00 | Fast color bases and fast color salts |
| 2935.90.29.00 | Acetylsulfaguanidine |
| 2935.90.30.00 | Sulfamethazine |
| 2935.90.32.00 | Acetylsulfisoxazole; Sulfacetamide, sodium; and Sulfamethazine, sodium |
| 2935.90.33.00 | Sulfathiazole and Sulfathiazole, sodium |
| 2935.90.42.00 | Salicylazosulfapyridine (Sulfasalazine); Sulfadiazine; Sulfaguanidine; Sulfamerizine; and Sulfapyridine |
| 2935.90.48.00 | Other sulfonamide compounds not specified elsewhere |
| 2935.90.60.00 | Other sulfonamides |
| 2935.90.75.00 | Products described in additional U.S. note 3 to section VI |
| 2935.90.95.00 | Other sulfonamide derivatives not classified above |
What is NOT Classified Here?
To ensure accurate classification, the following are excluded from this heading:
- Non-sulfonamide organic chemicals and compounds not containing the sulfonamide group.
- Pharmaceuticals that do not primarily consist of sulfonamide structures may fall under different headings in Chapter 30.
- Inorganic sulfonates and salts are classified elsewhere within Chapter 28 or 38.
Notes
- Regulatory Considerations: Certain sulfonamides, particularly those used as pesticides or pharmaceuticals, may be subject to additional import regulations and require permits or certifications.
- Duty Rates: Duty rates vary by specific HTS subheading and application. Perfluorooctane sulfonamides may be subject to environmental regulations affecting import.
- Chemical Nomenclature: Accurate chemical identification, including isomeric and substituent details, is essential for proper classification.
Declaration Example
Product: A shipment of N-Ethyl perfluorooctane sulfonamide for industrial use.US HTS Code:
2935.20.00.00Unit of Quantity: Kilogram (kg)
General Duty Rate: Variable – consult current USHTS schedule
Additional Requirements: Compliance with environmental and chemical safety regulations.
Related HTS Codes
- HTS 2933: Heterocyclic compounds with nitrogen atoms.
- HTS 2929: Other heterocyclic compounds.
- HTS 3004: Medicaments consisting of mixed or unmixed products containing sulfonamides.
