HTS heading 2934 · Chapter 29
HTS 2934: Nucleic acids and their salts, whether or not…
HTS heading 2934 covers nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds. It has 40 tariff lines with a duty rate; the general (MFN) rates are 6.5% (28 lines), Free (9 lines), 5.8% (2 lines) and others.
Imports may also owe Chapter 99 tariffs (Section 232, 301 or 201) depending on origin and date, plus the Merchandise Processing Fee and, by sea, the Harbor Maintenance Fee.
Rates from the 2026 HTS Revision 22, effective October 30, 2026. Source: U.S. International Trade Commission.
Tariff lines and duty rates
| HTS code | Description | General | Special | Column 2 | Estimate |
|---|---|---|---|---|---|
| 2934.10 | Compounds containing an unfused thiazole ring (whether or not hydrogenated) in the structure: | ||||
| Aromatic or modified aromatic: | |||||
| 2934.10.10.00 | Products described in additional U.S. note 3 to section VI[kg] | 6.5% | Free (A+,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG) 3.25% (JP) | 15.4¢/kg + 52% | Estimate → |
| 2934.10.20.00 | Other[kg] | 6.5% | Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,MA,OM,P, PA,PE,S,SG) | 15.4¢/kg + 52% | Estimate → |
| Other: | |||||
| 2934.10.70.00 | 4,5-Dichloro-2-n-octyl-4-isothiazolin-3-one; Ethyl 2-(2-aminothiazol-4-yl)-2- hydroxyiminoacetate; Ethyl 2-(2-aminothiazol-4-yl)-2- methoxyiminoacetate; 2-Methyl-4-isothiazolin- 3-one; 2-n-Octyl-4-isothiazolin-3-one; and Thiothiamine hydrochloride[kg] | Free | 30.5% | Estimate → | |
| 2934.10.90.00 | Other[kg] | 6.5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,L,MA,OM,P,PA,PE,S,SG) 3.25% (JP) | 30.5% | Estimate → |
| 2934.20 | Compounds containing in the structure a benzothiazole ring-system (whether or not hydrogenated), not further fused: | ||||
| 2934.20.05.00 | N-tert-Butyl-2-benzothiazolesulfenamide[kg] | 6.5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 52% | Estimate → |
| 2934.20.10.00 | 2,2'-Dithiobisbenzothiazole[kg] | 6.5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 57% | Estimate → |
| 2934.20.15.00 | 2-Mercaptobenzothiazole; andN-(Oxydiethylene)benzothiazole-2-sulfenamide[kg] | 6.5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 52% | Estimate → |
| 2934.20.20.00 | 2-Mercaptobenzothiazole, sodium salt (2-Benzothiazolethiol, sodium salt)[kg] | 6.5% | Free (A+,AU,BH,CL,CO,D, E,IL, JO, KR,MA,OM,P, PA,PE,S,SG) | 15.4¢/kg + 40% | Estimate → |
| 2934.20.25.00 | 2-Amino-5,6-dichloro benzo thiazole; 2-(4-Amino phenyl)-6-methyl benzo thiazole-7- sulfonic acid; 2-Amino-6-nitro benzo thiazole; andN,N-Di cyclo hexyl-2-benzo thiazole sulfenamide[kg] | Free | 15.4¢/kg + 52% | Estimate → | |
| 2934.20.30.00 | 2-Amino-6-methoxy benzo thiazole; 2-Amino-6-methyl benzo thiazole; 6-Ethoxy-2-benzo thiazo lethiol; 3-Methyl benzo thiazole-2-hydrazone; and Primuline base[kg] | 5.8% | Free (A+,AU,BH,CL,CO,D, E,IL,JO,KR, L,MA,OM,P, PA,PE,S,SG) | 15.4¢/kg + 39.5% | Estimate → |
| Other: | |||||
| 2934.20.35.00 | Pesticides[kg] | 6.5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 40% | Estimate → |
| Other: | |||||
| 2934.20.40.00 | Products described in additional U.S. note 3 to section VI[kg] | 6.5% | Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,L,MA,OM,P, PA,PE,S,SG) | 15.4¢/kg + 52% | Estimate → |
| 2934.20.80.00 | Other[kg] | 6.5% | Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,L,MA,OM,P, PA,PE,S,SG) | 15.4¢/kg + 52% | Estimate → |
| 2934.30 | Compounds containing in the structure a phenothiazine ring-system (whether or not hydrogenated), not further fused: | ||||
| 2934.30.12.00 | 2-(Trifluoromethyl)phenothiazine[kg] | 6.5% | Free (A+,AU,BH,CL,CO,D, E,IL, JO, KR,MA,OM,P, PA,PE,S,SG) | 15.4¢/kg + 45% | Estimate → |
| 2934.30.18.00 | Ethyl (1H-phenothiazin-2,4,1)carbamate[kg] | Free | 15.4¢/kg + 52% | Estimate → | |
| Other: | |||||
| Drugs: | |||||
| 2934.30.23.00 | Antidepressants, tranquilizers and other psychotherapeutic agents[kg] | 6.5% | Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,MA,OM,P, PA,PE,S,SG) | 15.4¢/kg + 149.5% | Estimate → |
| 2934.30.27.00 | Other[kg] | 6.5% | Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,MA,OM,P, PA,PE,S,SG) | 15.4¢/kg + 45% | Estimate → |
| Other: | |||||
| 2934.30.43.00 | Products described in additional U.S. note 3 to section VI[kg] | 6.5% | Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,MA,OM,P, PA,PE,S,SG) | 15.4¢/kg + 52% | Estimate → |
| 2934.30.50.00 | Other[kg] | 6.5% | Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,MA,OM,P, PA,PE,S,SG) | 15.4¢/kg + 52% | Estimate → |
| Other: | |||||
| 2934.91.00.00 | Aminorex (INN), brotizolam (INN), clotiazepam (INN), cloxazolam (INN), dextromoramide (INN), haloxazolam (INN), ketazolam (INN), mesocarb (INN), oxazolam (INN), pemoline (INN), phendimetrazine (INN), phenmetrazine (INN) and sufentanil (INN); salts thereof[kg] | Free | 15.4¢/kg + 52% | Estimate → | |
| 2934.92.00.00 | Other fentanyls and their derivatives[kg] | 6.5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG) | 30.5% | Estimate → |
| 2934.99 | Other: | ||||
| Aromatic or modified aromatic: | |||||
| 2934.99.01.00 | Mycophenolate mofetil[kg] | Free | 15.4¢/kg + 45% | Estimate → | |
| 2934.99.03.00 | 2-Acetylbenzo(b)thiophene; 3-Methylene-7-(2-phenoxyacetamido)- cephan-4-carboxylic acid, p-nitrobenzyl ester, 1-oxide; and Naphth[1,2-d]-[1,2,3]-oxadiazole-5-sulfonic acid and its sodium salt[kg] | Free | 15.4¢/kg + 52% | Estimate → | |
| 2934.99.05.00 | 5-Amino-3-phenyl-1,2,4-thiadiazole (3-Phenyl-5-amino-1,2,4-thiadiazole); 2-Hydroxybenzoxazole (Benzoxazolone); 4-Phenylmorpholine; 1,9-Thianthrenedicarboxylic acid; and Thioxanthene-9-one (Thioxanthone)[kg] | 5.8% | Free (A+,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 39.5% | Estimate → |
| 2934.99.06.00 | 7-Nitronaphth[1,2]oxadiazole-5-sulfonic acid and its salts[kg] | 6.5% | Free (A+,AU,BH,CL,CO,D,E,IL,JO,KR,L,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 66.5% | Estimate → |
| 2934.99.07.00 | Ethyl 2-[4-[(6-chloro-2-benzoxazolyl)oxy]- phenoxy]propanoate (Fenoxaprop-ethyl)[kg] | Free | 15.4¢/kg + 48.5% | Estimate → | |
| 2934.99.08.00 | 2,5-Diphenyloxazole[kg] | 6.5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 52% | Estimate → |
| 2934.99.09.00 | 1,2-Benzisothiazolin-3-one[kg] | Free | 15.4¢/kg + 40.5% | Estimate → | |
| Other: | |||||
| Pesticides: | |||||
| 2934.99.11.00 | 2-tert-Butyl-4-(2,4-dichloro-5- isopropoxyphenyl)-Δ²-1,3,4- oxadiazolin-5-one; 3-Isopropyl-1H-2,1,3- benzothiadiazin-4-(3H)-one-2,2- dioxide (Bentazon); andO,O-Diethyl-S-[(6-chloro-2- oxobenzoxazolin-3-yl)methyl]- phosphorodithioate (Phosalone)[kg] | 6.5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 40.5% | Estimate → |
| Other: | |||||
| 2934.99.12.00 | Fungicides[kg] | 6.5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 40% | Estimate → |
| 2934.99.15.00 | Herbicides[kg] | 6.5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) 3.25% (JP) | 15.4¢/kg + 48.5% | Estimate → |
| 2934.99.16.00 | Insecticides[kg] | 6.5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 64.5% | Estimate → |
| 2934.99.18.00 | Other[kg] | 6.5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 40% | Estimate → |
| 2934.99.20.00 | Photographic chemicals[kg] | 6.5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 50% | Estimate → |
| 2934.99.30.00 | Drugs[kg] | 6.5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 45% | Estimate → |
| Other: | |||||
| 2934.99.39.00 | Products described in additional U.S. note 3 to section VI[kg] | 6.5% | Free (A+,AU,BH,CL,CO,D,E,IL,JO,K,KR,L,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 52% | Estimate → |
| 2934.99.44.00 | Other[kg] | 6.5% | Free (A+,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG) | 15.4¢/kg + 52% | Estimate → |
| Other: | |||||
| 2934.99.47 | Drugs | 3.7% | Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG) | 25% | |
| 2934.99.47.20 | Rocuronium (INN) and its salts[kg] | Estimate → | |||
| 2934.99.47.30 | Tacrolimus (INN) and its salts[kg] | Estimate → | |||
| 2934.99.47.40 | Timolol maleate and its salts[kg] | Estimate → | |||
| 2934.99.47.90 | Other[kg] | Estimate → | |||
| Other: | |||||
| 2934.99.70.00 | Morpholinoethyl chloride hydrochloride; 2-Methyl-2,5-dioxo-1-oxa-2-phospholan; and (6R-trans)-7-Amino-3-methyl-8-oxo-5- thia-1-azabicyclo[4.2.0]-oct-2-ene-2- carboxylic acid[kg] | Free | 30.5% | Estimate → | |
| 2934.99.90.01 | Other[kg] | 6.5% | Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG) | 30.5% | Estimate → |
44 lines shown. Statistical suffixes (the last two digits) inherit the rate of the 8-digit subheading above them.
Example: base duty and fees on $10000
For HTS 2934.10.10.00 at the general rate of 6.5%, shipped by ocean, before any Chapter 99 tariffs:
| Base duty (6.5%) | $650.00 |
| Merchandise Processing Fee (0.3464%, min $34.58) | $34.64 |
| Harbor Maintenance Fee (0.125%) | $12.50 |
| Duty and fees | $697.14 |
Origin-specific tariffs can multiply this. Run this example from China or from Mexico to see every line.
Special program codes in this heading
- A, A*, A+
- Generalized System of Preferences (GSP)
- AU
- U.S.–Australia FTA
- BH
- U.S.–Bahrain FTA
- CL
- U.S.–Chile FTA
- CO
- U.S.–Colombia Trade Promotion Agreement
- D
- African Growth and Opportunity Act (AGOA)
- E, E*
- Caribbean Basin Economic Recovery Act
- IL
- U.S.–Israel FTA
- JO
- U.S.–Jordan FTA
- JP
- U.S.–Japan Trade Agreement
- K
- Agreement on Trade in Pharmaceutical Products
- KR
- U.S.–Korea FTA (KORUS)
- L
- Uruguay Round concessions on intermediate chemicals for dyes
- MA
- U.S.–Morocco FTA
- OM
- U.S.–Oman FTA
- P, P+
- CAFTA-DR
- PA
- U.S.–Panama Trade Promotion Agreement
- PE
- U.S.–Peru Trade Promotion Agreement
- S, S+
- USMCA (United States–Mexico–Canada Agreement)
- SG
- U.S.–Singapore FTA
A special rate applies only when the goods qualify under that program's rules of origin and the claim is made at entry.
Frequently asked questions
What is the duty rate for HTS 2934?
Heading 2934 has 40 rate lines. The general (MFN) duty rates are 6.5% (28 lines), Free (9 lines), 5.8% (2 lines), 3.7% (1 line). Products of free trade agreement partners may enter at the special rate, and Column 2 rates apply to countries without normal trade relations. Chapter 99 tariffs can be added on top: calculate the full amount.
Do Section 301, 232 or 201 tariffs apply to HTS 2934?
It depends on the 8- or 10-digit subheading, the country of origin, the entry date and, for Section 232, the metal content. These additional duties are listed in Chapter 99 of the HTS. The free duty calculator checks each program for a given code, origin and date and shows which apply and why.
What fees are added to an import under HTS 2934?
Formal entries pay the Merchandise Processing Fee of 0.3464% of value (minimum $34.58, maximum $670.86 in FY2027). Ocean shipments also pay the Harbor Maintenance Fee of 0.125% of value. See the import duty calculator for how they combine.