Schedule in force 2026-08-31HTS 2026HTSRev17HTS 2935 · Chapter 29
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HTS 2935

Heading 2935 covers sulfonamides. Duty is assessed at the 10-digit statistical line; the figures here are resolved for 2935.10.00.00, the first line under this heading. Its Column 1 rate is 6.5%; other lines under 2935 carry different Column 1 rates. On top of that, the ad valorem total depends on origin: China carries 19.00% and Italy carries 10.00%.

Chapter 29 · Verified 2026-08-31
HTS 2026HTSRev17

19 statistical lines under this heading · 2 distinct Column 1 rates · highest ad valorem total 19.00% from China · lowest 10.00% from Italy

OriginAd valorem layersLayersReported under
China CHN19.00%mfn + s3019903.05.31
Vietnam VNM19.00%mfn + s3019903.05.84
Thailand THA19.00%mfn + s3019903.05.77
Brazil BRA19.00%mfn + s3019903.05.27
Mexico MEX16.50%mfn + s3019903.05.55
Canada CAN16.50%mfn + s3019903.05.29
India IND16.50%mfn + s3019903.05.44
United Kingdom GBR16.50%mfn + s3019903.05.81
Japan JPN12.50%s3019903.05.49
South Korea KOR12.50%s3019903.05.71
Germany DEU10.00%s3019903.05.39
Italy ITA10.00%s3019903.05.39
Table 1Rate by country of origin for 2935.10.00.00, resolved 2026-08-31. The first statistical line under 2935; other lines may carry different Column 1 rates.
CodeDescriptionColumn 1SpecialUnits
2935.10.00.00N-Methyl perfluorooctane sulfonamide6.5%Free (A+,AU,BH,CL,CO,D, E,IL, JO, KR,MA,OM,P, PA,PE,S,SG)kg
2935.20.00.00N-Ethyl perfluorooctane sulfonamide6.5%Free (A+,AU,BH,CL,CO,D, E,IL, JO, KR,MA,OM,P, PA,PE,S,SG)kg
2935.30.00.00N-Ethyl -N-(2-hydroxyethyl)perfluorooctane sulfonamide6.5%Free (A+,AU,BH,CL,CO,D, E,IL, JO, KR,MA,OM,P, PA,PE,S,SG)kg
2935.40.00.00N-(2-hydroxyethyl)-N-methyl perfluorooctane sulfonamide6.5%Free (A+,AU,BH,CL,CO,D, E,IL, JO, KR,MA,OM,P, PA,PE,S,SG)kg
2935.50.00.00Other perfluorooctane sulfonamides6.5%Free (A+,AU,BH,CL,CO,D, E,IL, JO, KR,MA,OM,P, PA,PE,S,SG)kg
2935.90.06.004-Amino-6-chloro-m-benzenedisulfonamide and Methyl-4-aminobenzenesulfonylcarbamate (Asulam)6.5%Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG)kg
2935.90.10.002-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 Metanilamide6.5%Free (A+,AU,BH,CL,CO,D,E,IL,JO,KR,L,MA,OM,P,PA,PE,S,SG)kg
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-toluenesulfonamidesFree—kg
2935.90.15.00o-Toluenesulfonamide6.5%Free (A+,AU,BH,CL,CO,D, E,IL, JO, KR,MA,OM,P, PA,PE,S,SG)kg
2935.90.20.00Fast color bases and fast color salts6.5%Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)kg
2935.90.29.00AcetylsulfaguanidineFree—kg
2935.90.30.00SulfamethazineFree—kg
2935.90.32.00Acetylsulfisoxazole; Sulfacetamide, sodium; and Sulfamethazine, sodium6.5%Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG)kg
2935.90.33.00Sulfathiazole and Sulfathiazole, sodiumFree—kg
2935.90.42.00Salicylazosulfapyridine (Sulfasalazine); Sulfadiazine; Sulfaguanidine; Sulfamerizine; and SulfapyridineFree—kg
2935.90.48.00Other6.5%Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,MA,OM,P, PA,PE,S,SG)kg
2935.90.60.00Other6.5%Free (A+,AU,BH,CL,CO,D, E,IL, JO,K, KR,MA,OM,P, PA,PE,S,SG)kg
2935.90.75.00Products described in additional U.S. note 3 to section VI6.5%Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,L,MA,OM,P, PA,PE,S,SG)kg
2935.90.95.00Other6.5%Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,MA,OM,P, PA,PE,S,SG)kg
Table 2Statistical suffixes under 2935. Duty is assessed at the 10-digit level; the Column 1 rate is stated at the subheading and inherited below it.
ProgrammeRate as publishedContributionReported underIn force from
Column 1 General (MFN)6.5%6.50%—not established

Source: USITC, Harmonized Tariff Schedule of the United States, 2026 HTS Revision 17, published 2026-08-01. Verified 2026-08-31.

Section 301The duty provided in the applicable subheading + 12.5%12.50%9903.05.312026-07-24

Source: USTR, Notice of Actions in Section 301 Investigations of Various Economies (FR Doc. 2026-15181), published 2026-07-28. Verified 2026-08-31.

Table 3Duty stack for 2935.10.00.00 from China, resolved 2026-08-31.

Common questions

What is the duty rate for HTS 2935?
Heading 2935 covers sulfonamides. Duty is assessed at the 10-digit statistical line; the figures here are resolved for 2935.10.00.00, the first line under this heading. Its Column 1 rate is 6.5%; other lines under 2935 carry different Column 1 rates. On top of that, the ad valorem total depends on origin: China carries 19.00% and Italy carries 10.00%.
Why does the rate differ by country for the same HTS code?
The Column 1 rate is the same for every origin with normal trade relations. Trade-remedy duties under Sections 232, 301 and 338 are imposed by origin, by product, or by both, so two shipments of the same article from different countries can carry very different totals.
Is this the rate I will actually pay?
It is the rate that applies to this classification and origin on the date shown. The duty owed on a specific entry also depends on the 10-digit statistical suffix, declared content where a duty is content-based, preference eligibility, and any AD/CVD order in scope.