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HSChapter 29
U.S. imports of heterocyclic compounds with unfused pyridine ring (nesoi) (HS 293339) totaled $141.1M in April 2026, traded with 32 countries.
Importers of Heterocyclic Compounds with Unfused Pyridine Ring (NESOI) paid $5.4M in duties in April 2026 — an effective duty rate of 6.5% on $82.6M in dutiable value, based on actual customs collections rather than the published tariff schedule. Heterocyclic Compounds with Unfused Pyridine Ring (NESOI) imports of $141.1M in April 2026 ran 25% above the year-to-date monthly average of $113.3M.
Last updated: April 2026 dataCompounds containing an unfused pyridine ring but not classifiable as pyridine itself, piperidine, or the named controlled substances cover an exceptionally broad range of commercial products — including herbicides such as paraquat dichloride (2933392300), pyridine-based fungicides (2933392100), antidepressants and tranquilizers (2933393100), and numerous other pharmaceutical and agrochemical intermediates. China and India together dominate US supply under this heading, and Chinese-origin goods across multiple lines are subject to Section 301 tariffs. The heading's fourteen 10-digit lines require careful product-specific classification, particularly for pesticides subject to EPA registration requirements and for drugs subject to FDA oversight.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Pesticide active ingredients and formulations imported into the US must be registered with the EPA under FIFRA (Federal Insecticide, Fungicide, and Rodenticide Act). Paraquat dichloride (2933392300) is a Restricted Use Pesticide, meaning importers must also ensure the product is destined for a certified applicator or licensed distributor. CBP coordinates with EPA at entry to verify FIFRA compliance.
Line 2933393100 covers antidepressants, tranquilizers, and other psychotherapeutic drugs containing an unfused pyridine ring, while 2933394100 captures other drugs in this chemical family. Classification depends on the compound's pharmacological action and INN designation. When the therapeutic category is ambiguous or the compound has multiple indications, a binding ruling request to CBP is the most reliable path to correct classification.
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Monthly import values over time
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 2933394100 | DRUGS CONT AN UNFUSED PYRIDINE RING ETC, NESOI | $40.7M | 6.50% | $91K |
| 2933392700 | OTHER PESTICIDES CONT AN UNFUSED PYRIDINE RING ETC | $30.9M | 6.50% | $1.5M |
| 2933392500 | OTHER HERBICIDES CONT AN UNFUSED PYRIDINE RING ETC | $16.0M | 6.74% | $1.1M |
| 2933399200 | COMPOUND CONT AN UNFUSED PYRIDINE RING ETC,NESOI | $15.6M | 6.53% | $680K |
| 2933392100 | FUNGICIDES CONTAINING AN UNFUSED PYRIDINE RING | $15.3M | 6.50% | $1.0M |
| 2933396191 | PROD IN USN 3,SEC 6 CONT UNFUS PYRIDINE RING NESOI | $11.2M | 6.45% | $486K |
| 2933392300 | O-PARAQUAT DICHLORIDE | $7.8M | 6.50% | $481K |
| 2933392000 | P-CHLORO-2-BENZYLPYRIDINE; 2-METHYL-5-ETHYLPYR ETC | $1.6M | 5.80% | $94K |
| 2933390800 | 1-(3-SULFAPROPYL) PRYIDINIUM HYDROXIDE; ETC. | $1.6M | -- | -- |
| 2933391000 | COLLIDINES, LUTIDINES AND PICOLINES | $359K | -- | -- |
| 2933393100 | ANTIDEPRESSANTS, TRANQUILIZERS AND OTHER PSCHO ETC | $15K | -- | -- |
DRUGS CONT AN UNFUSED PYRIDINE RING ETC, NESOI
OTHER PESTICIDES CONT AN UNFUSED PYRIDINE RING ETC
OTHER HERBICIDES CONT AN UNFUSED PYRIDINE RING ETC
COMPOUND CONT AN UNFUSED PYRIDINE RING ETC,NESOI
FUNGICIDES CONTAINING AN UNFUSED PYRIDINE RING
PROD IN USN 3,SEC 6 CONT UNFUS PYRIDINE RING NESOI
O-PARAQUAT DICHLORIDE
P-CHLORO-2-BENZYLPYRIDINE; 2-METHYL-5-ETHYLPYR ETC
1-(3-SULFAPROPYL) PRYIDINIUM HYDROXIDE; ETC.
COLLIDINES, LUTIDINES AND PICOLINES
ANTIDEPRESSANTS, TRANQUILIZERS AND OTHER PSCHO ETC
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2933399055 | COMPOUNDS CONT AN UNFUSED PYRIDINE RING ETC, NESOI | $89.3M |
| 2933399020 | 1-[N,N-DIALKYL(<=C10)-N-(N-(HYDROXYL,CYANO,ACETOXY | $2.2M |
| 2933399010 | 3-QUINUCLINDINYL BENZILATE | $92K |
COMPOUNDS CONT AN UNFUSED PYRIDINE RING ETC, NESOI
520.8K kg
1-[N,N-DIALKYL(<=C10)-N-(N-(HYDROXYL,CYANO,ACETOXY
240 kg
3-QUINUCLINDINYL BENZILATE
1.4K kg
LACTAMS (EXCLUDING 6-HEXANELACTAM) NESOI
HS 293379
| State | Imports | Exports | Balance |
|---|---|---|---|
| Puerto Rico | $27.9M | $43.5M | +$15.6M |
| Missouri | $23.6M | $22.8M | -$787K |
| Georgia | $21.0M | $13.2M | -$7.8M |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| MIAMI INTERNATIONAL AIRPORT, FL | $28.4M | $43.5M | +$15.1M |
| NORFOLK-NEWPORT NEWS, VA | $26.5M | $2.6M | -$24.0M |
| NEW YORK, NY | $6.7M | $19.2M | +$12.5M |