26,806 official source entries are searchable. Checked 2026-09-22; edition published 2026-09-15.
Printed tariff and statistical lines from this edition, separate from historical WITS averages. Blank duty cells are not a confirmed zero. Review the parent tariff line, general and chapter notes, chapter 99, origin, exclusions, quotas and additional duties. No shipment total or special-rate eligibility is calculated. The edition publication date is not a line-level effective date.
Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds: › Other: › Other: › Aromatic or modified aromatic:
Mycophenolate mofetil
Source units: kg
Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds: › Other: › Other: › Aromatic or modified aromatic:
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
Source units: kg
Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds: › Other: › Other: › Aromatic or modified aromatic:
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)
Source units: kg
Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds: › Other: › Other: › Aromatic or modified aromatic:
7-Nitronaphth[1,2]oxadiazole-5-sulfonic acid and its salts
Source units: kg
Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds: › Other: › Other: › Aromatic or modified aromatic:
Ethyl 2-[4-[(6-chloro-2-benzoxazolyl)oxy]- phenoxy]propanoate (Fenoxaprop-ethyl)
Source units: kg
Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds: › Other: › Other: › Aromatic or modified aromatic:
2,5-Diphenyloxazole
Source units: kg
Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds: › Other: › Other: › Aromatic or modified aromatic:
1,2-Benzisothiazolin-3-one
Source units: kg
Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds: › Other: › Other: › Aromatic or modified aromatic: › Other: › Pesticides:
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)
Source units: kg
Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds: › Other: › Other: › Aromatic or modified aromatic: › Other: › Pesticides: › Other:
Fungicides
Source units: kg
Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds: › Other: › Other: › Aromatic or modified aromatic: › Other: › Pesticides: › Other:
Herbicides
Source units: kg
Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds: › Other: › Other: › Aromatic or modified aromatic: › Other: › Pesticides: › Other:
Insecticides
Source units: kg
Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds: › Other: › Other: › Aromatic or modified aromatic: › Other: › Pesticides: › Other:
Other
Source units: kg
Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds: › Other: › Other: › Aromatic or modified aromatic: › Other:
Photographic chemicals
Source units: kg
Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds: › Other: › Other: › Aromatic or modified aromatic: › Other:
Drugs
Source units: kg
Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds: › Other: › Other: › Aromatic or modified aromatic: › Other: › Other:
Products described in additional U.S. note 3 to section VI
Source units: kg
Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds: › Other: › Other: › Aromatic or modified aromatic: › Other: › Other:
Other
Source units: kg
Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds: › Other: › Other: › Other:
Drugs
Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds: › Other: › Other: › Other: › Drugs
Rocuronium (INN) and its salts
Source units: kg
Drugs
Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds: › Other: › Other: › Other: › Drugs
Tacrolimus (INN) and its salts
Source units: kg
Drugs
Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds: › Other: › Other: › Other: › Drugs
Timolol maleate and its salts
Source units: kg
Drugs
Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds: › Other: › Other: › Other: › Drugs
Other
Source units: kg
Drugs
Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds: › Other: › Other: › Other: › Other:
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
Source units: kg
Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds: › Other: › Other: › Other: › Other:
Other
Source units: kg
Reported average: 4.60526323318481%.
Source year: 2023. Classification: HS 2022 (H6). Checked 2026-09-14.
National lines included: 19 of 19. Excluded from the average: 0.
Reported ad-valorem range: 0%–6.5%.
Reported historical ad-valorem MFN simple average for 2023, not a national tariff schedule. No preferential rates, additional duties, VAT, excise or import permissions are determined.
Not a current 2026 national duty. The HS6 average does not determine the duty of a particular national subdivision, origin or shipment.
WITS observation for this code and year
UN Comtrade H6 descriptions (HS 2022)
WITS API definitions: reported averages and excluded national lines
Direct HS code answer for United States
The source reports an indicative HS6 MFN average of 4.61% (2023 MFN average) for Nucleic acids and their salts, other heterocyclic compounds, n.e.c. in heading number 2934.Source status: not assessed. Verify the exact national tariff line, origin treatment, taxes, restrictions, and current customs guidance before using this information in a declaration.
4.61% (2023 MFN average)
not assessed
Import planning
Request a one-page research summary with source checks, landed-cost inputs, and points to verify for HS code 293499 in United States.
Each destination shows its own source label. Oman uses its national schedule; Qatar and UAE entries may cite their separately published references and unresolved exceptions. Other entries retain the historical GCC reference. National codes, duty notes, restrictions and tax treatment can differ; verify with the destination customs authority.
| HS Code | Description | Duty |
|---|---|---|
| 293410 | Heterocyclic compounds; containing an unfused thiazole ring (whether or not hydrogenated) in the structure | 4.88% (2023 MFN average)WITS 2023 historical MFN average |
| 293420 | Heterocyclic compounds; containing in the structure, a benzothiazole ring-system (whether or not hydrogenated), not further fused | 5.70% (2023 MFN average)WITS 2023 historical MFN average |
| 293430 | Heterocyclic compounds; containing in the structure, a phenothiazine ring-system (whether or not hydrogenated), not further fused | 5.42% (2023 MFN average)WITS 2023 historical MFN average |
| 293491 | Heterocyclic compounds; other heterocyclic compounds, n.e.c. in 2934.1, 2934.2 and 2934.3 | 0.00% (2023 MFN average)WITS 2023 historical MFN average |
| 293492 | Heterocyclic compounds; other fentanyls n.e.c. in 2934, and their derivatives | 6.50% (2023 MFN average)WITS 2023 historical MFN average |
Data source: WITS/UNCTAD TRAINS (MFN 2022). Values are indicative HS6 MFN averages, not shipment-specific applied rates. Import permission and restrictions are not assessed. Historical reference rates exclude VAT, excise and other national measures. Separate national entries preserve the columns printed by their source; these are not a complete shipment assessment. Full disclaimer.