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HSChapter 29
U.S. imports of heterocyclic compounds with phenothiazine ring system (HS 293430) totaled $816K in April 2026, traded with 8 countries.
Importers of Heterocyclic Compounds with Phenothiazine Ring System paid $5K in duties in April 2026 — an effective duty rate of 6.5% on $71K in dutiable value, based on actual customs collections rather than the published tariff schedule. Heterocyclic Compounds with Phenothiazine Ring System imports of $816K in April 2026 ran 18% below the year-to-date monthly average of $997K.
Last updated: April 2026 dataPhenothiazine-ring compounds occupy a critical position in the pharmaceutical supply chain, serving as the structural backbone for antipsychotics, antihistamines, and antiemetics. The US schedule subdivides this heading into six tariff lines, distinguishing named drugs such as chlorpromazine and butaperazine maleate (2934301000) from broader categories of antidepressants and tranquilizers (2934302300), non-drug industrial compounds (2934305050), and products subject to US Note 3 to Section VI (2934304300). Germany leads supply into the US market, followed by China and Ireland, reflecting the concentration of active pharmaceutical ingredient manufacturing in European and Asian chemical hubs. Importers should verify FDA drug registration status and DEA scheduling for any controlled substances within this heading before shipment.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
The schedule separates named pharmaceutical substances (e.g., chlorpromazine under 2934301000), broader psychoactive drug categories (2934302300), and drugs not elsewhere specified (2934302700) from purely industrial or non-drug compounds (2934305050). Importers must confirm the intended end-use and chemical identity to select the correct line, as misclassification between drug and non-drug provisions can affect both duty rate and FDA admissibility requirements.
Shipments of phenothiazine APIs intended for drug manufacture generally require an FDA Drug Master File or import alert clearance, and any substance with controlled-substance potential must comply with DEA import permit requirements. Consult a licensed customs broker and confirm FDA establishment registration before the first shipment.
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Monthly import values over time
| Country | Imports | Exports | Balance |
|---|---|---|---|
| GERMANY | $426K | $3K | -$423K |
| CHINA | $361K | -- | -$361K |
| INDIA | $29K | $5K | -$24K |
| UNITED KINGDOM | -- | $7K | +$7K |
| TAIWAN | -- | $5K | +$5K |
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 2934305000 | OTHER CMPDS CONT A PHENOTHIAZINE RING SYSTEM ETC | $787K | 6.50% | $5K |
| 2934302700 | DRUGS W/ A PHENO RING SYS (W/T HYDRO), NESOI | $29K | -- | -- |
| 2934302300 | ANTIDEPRESSANTS, TRANQUILIZERS AND OTHER PSCH AGTS | $0 | -- | -- |
| 2934304300 | PROD IN U.S. NOTE 3 TO SEC 6 CONT A PHENOTHIAZ ETC | $0 | -- | -- |
OTHER CMPDS CONT A PHENOTHIAZINE RING SYSTEM ETC
DRUGS W/ A PHENO RING SYS (W/T HYDRO), NESOI
ANTIDEPRESSANTS, TRANQUILIZERS AND OTHER PSCH AGTS
PROD IN U.S. NOTE 3 TO SEC 6 CONT A PHENOTHIAZ ETC
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2934302300 | ANTIDEPRESSANTS, TRANQUILIZERS AND OTHER PSCH AGTS | $12K |
| 2934305050 | CMPDS (EXC DRUGS) CONT A PHENOTHIAZINE RING ETC | $11K |
| 2934301000 | BUTAPERAZINE MALEATE; CHLORPROMAZINE; ETC | $5K |
| 2934302700 | DRUGS W/ A PHENO RING SYS (W/T HYDRO), NESOI | $3K |
ANTIDEPRESSANTS, TRANQUILIZERS AND OTHER PSCH AGTS
17 kg
CMPDS (EXC DRUGS) CONT A PHENOTHIAZINE RING ETC
2.3K kg
BUTAPERAZINE MALEATE; CHLORPROMAZINE; ETC
25 kg
DRUGS W/ A PHENO RING SYS (W/T HYDRO), NESOI
1 kg
NUCLEIC ACIDS & SALTS; OTHER HETEROCYCLIC CMP, NES
HS 293499
HETEROCYCLIC COMP W NITROGEN HETERO-ATM ONLY NESOI
HS 293399
POLYPEPTIDE PROTEIN& GLYCOPROTEIN HORMONES &DERIV
HS 293719
CMPDS CONT AN UNFUSED PYRIDINE RING ETC NESOI
HS 293339
COMP WITH PYRIMIDINE OR PIPERAZINE RING, NESOI
HS 293359
ANTIBIOTICS, NESOI
HS 294190
| State | Imports | Exports | Balance |
|---|---|---|---|
| Texas | $731K | -- | -$731K |
| West Virginia | $71K | -- | -$71K |
| New Jersey | $14K | $4K | -$10K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| HOUSTON, TX | $716K | -- | -$716K |
| NEW ORLEANS, LA | $71K | $11K | -$60K |
| HOUSTON INTERCONTINENTAL AIRPORT, TX | $15K | -- | -$15K |