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HSChapter 29
U.S. imports of derivatives of malonylurea (barbituric acid) and their salts (nesoi) (HS 293354) totaled $600K in April 2026, traded with 5 countries.
Derivatives of Malonylurea (Barbituric Acid) and Their Salts (NESOI) imports of $600K in April 2026 ran 11% below the year-to-date monthly average of $678K.
Last updated: April 2026 dataBarbituric acid derivatives not enumerated in the named-barbiturate heading (293353) fall here — a residual category that captures less common barbiturate structures, novel synthetic intermediates, and salt forms used in specialty pharmaceutical research and manufacturing. Singapore leads US supply under this heading, an unusual sourcing pattern that reflects the presence of specialty fine-chemical manufacturers in Southeast Asia serving global pharma supply chains. Hungary, India, and Germany are also notable sources. Because many derivatives in this category may qualify as DEA-scheduled substances depending on their specific structure, importers must conduct a substance-by-substance DEA scheduling analysis before import.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
DEA scheduling is compound-specific and depends on the derivative's chemical structure and pharmacological profile. Importers should submit a scheduling inquiry to DEA's Diversion Control Division or obtain a formal scheduling determination before the first shipment. Importing an unscheduled analog that DEA later determines is a controlled substance analog can trigger enforcement action under the Federal Analogue Act.
Singapore hosts a number of specialty fine-chemical and pharmaceutical contract manufacturing operations that serve as regional hubs for Asian and global supply chains. These facilities often source precursor materials from elsewhere in Asia, perform final synthesis or purification, and export finished intermediates to the US market. The Singapore origin reflects this hub-and-spoke manufacturing model rather than domestic raw-material production.
Monthly import values over time
Supplier Network
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HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 2933540000 | DERIVATIVES OF MALONYLUREA & ITS SALTS, NESOI | $600K | 3.70% | $242 |
DERIVATIVES OF MALONYLUREA & ITS SALTS, NESOI
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2933540000 | DERIVATIVES OF MALONYLUREA AND ITS SALTS, NESOI | $44K |
DERIVATIVES OF MALONYLUREA AND ITS SALTS, NESOI
82 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 |
|---|---|---|---|
| Kentucky | $587K | $32K | -$555K |
| Unidentified | -- | $12K | +$12K |
| Ohio | $7K | -- | -$7K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| CHICAGO, IL | $587K | -- | -$587K |
| NEW ORLEANS, LA | $6K | $14K | +$8K |
| CLEVELAND, OH | -- | $18K | +$18K |