Heading 2935
HTS code 2935 — Sulfonamides
- Chapter
- 29 — Organic chemicals
- Tariff lines
- 19
- General duty
- General duty rate of 6.5%, with 5 duty-free lines
Tariff lines under heading 2935
Full 10-digit codes with their general (MFN) duty rates. The correct line depends on the product's material, construction, and use.
| HTS code | Description | General rate | Unit |
|---|---|---|---|
| 2935.10.0000 | N-Methyl perfluorooctane sulfonamide (Sulfonamides) | 6.5% | kg |
| 2935.20.0000 | N-Ethyl perfluorooctane sulfonamide (Sulfonamides) | 6.5% | kg |
| 2935.30.0000 | N-Ethyl -N-(2-hydroxyethyl)perfluorooctane sulfonamide (Sulfonamides) | 6.5% | kg |
| 2935.40.0000 | N-(2-hydroxyethyl)-N-methyl perfluorooctane sulfonamide (Sulfonamides) | 6.5% | kg |
| 2935.50.0000 | Other perfluorooctane sulfonamides (Sulfonamides) | 6.5% | kg |
| 2935.90.0600 | 4-Amino-6-chloro-m-benzenedisulfonamide and Methyl-4-aminobenzenesulfonylcarbamate (Asulam) (Sulfonamides > Other) | 6.5% | kg |
| 2935.90.1000 | 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 (Sulfonamides > Other) | 6.5% | kg |
| 2935.90.1300 | (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 (Sulfonamides > Other) | Free | kg |
| 2935.90.1500 | o-Toluenesulfonamide (Sulfonamides > Other) | 6.5% | kg |
| 2935.90.2000 | Fast color bases and fast color salts (Sulfonamides > Other > Other) | 6.5% | kg |
| 2935.90.2900 | Acetylsulfaguanidine (Sulfonamides > Other > Other > Drugs > Anti-infective agents) | Free | kg |
| 2935.90.3000 | Sulfamethazine (Sulfonamides > Other > Other > Drugs > Anti-infective agents) | Free | kg |
| 2935.90.3200 | Acetylsulfisoxazole; Sulfacetamide, sodium; and Sulfamethazine, sodium (Sulfonamides > Other > Other > Drugs > Anti-infective agents) | 6.5% | kg |
| 2935.90.3300 | Sulfathiazole and Sulfathiazole, sodium (Sulfonamides > Other > Other > Drugs > Anti-infective agents) | Free | kg |
| 2935.90.4200 | Salicylazosulfapyridine (Sulfasalazine); Sulfadiazine; Sulfaguanidine; Sulfamerizine; and Sulfapyridine (Sulfonamides > Other > Other > Drugs > Anti-infective agents) | Free | kg |
| 2935.90.4800 | Other (Sulfonamides > Other > Other > Drugs > Anti-infective agents) | 6.5% | kg |
| 2935.90.6000 | Other (Sulfonamides > Other > Other > Drugs) | 6.5% | kg |
| 2935.90.7500 | Products described in additional U.S. note 3 to section VI (Sulfonamides > Other > Other > Other) | 6.5% | kg |
| 2935.90.9500 | Other (Sulfonamides > Other > Other > Other) | 6.5% | kg |
Documents required to import under 2935
Customs paperwork typically required to import these goods into the United States. Conditional items depend on shipment value, transport mode, or origin.
- Commercial InvoiceRequired
- Packing ListRequired
- Bill of Lading / Airway BillRequired
- CBP Entry Summary (7501)Required
Prepared and filed by your customs broker
- CBP Entry / Release (3461)Required
Prepared and filed by your customs broker
- Customs Bond (CBP 301)Conditional
Required for formal entries — generally shipments valued over $2,500
Single-entry or continuous bond, obtained through your broker or a surety
- Importer Security Filing (ISF "10+2")Conditional
Required for ocean freight only
Filed electronically at least 24 hours before loading at the foreign port
- Importer ID Input Record (CBP 5106)Conditional
Required to establish or update your importer-of-record number with CBP
One-time setup for a new importer; not filed per shipment
- Entry Manifest (CBP 7533)Conditional
Alternative to the 3461 for informal, low-value, or contiguous-country entries
- Safety Data Sheet (SDS/MSDS)Required
- EPA TSCA CertificationConditional
Required for chemical substances regulated under TSCA
- EPA Notice of Arrival (Form 3540-1)Conditional
Required for pesticides and devices (typically Ch. 38)
Common questions
- What is HTS code 2935?
- HTS heading 2935 covers sulfonamides. It sits in Chapter 29 (organic chemicals) of the US Harmonized Tariff Schedule and contains 19 tariff lines.
- What is the duty rate for HTS 2935?
- General duty rate of 6.5%, with 5 duty-free lines. The general rate applies to most-favoured-nation trading partners; goods from countries with a free trade agreement may qualify for a reduced or duty-free special rate.
- How many digits does a full HTS code have?
- US import entries require the full 10-digit HTS code. Heading 2935 is the first four digits — the remaining six narrow it down to the specific product, which is what determines the duty rate you actually pay.
Related headings in Chapter 29
- 2901Acyclic hydrocarbons
- 2902Cyclic hydrocarbons
- 2903Halogenated derivatives of hydrocarbons
- 2904Sulfonated, nitrated or nitrosated derivatives of hydrocarbons, whether or not halogenated
- 2905Acyclic alcohols and their halogenated, sulfonated, nitrated or nitrosated derivatives
- 2906Cyclic alcohols and their halogenated, sulfonated, nitrated or nitrosated derivatives
- 2907Phenols; phenol-alcohols
- 2908Halogenated, sulfonated, nitrated or nitrosated derivatives of phenols or phenol-alcohols