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HSChapter 29
U.S. imports of malonylurea (barbituric acid) and its salts (HS 293352) totaled $58K in May 2026, traded with 3 countries.
Malonylurea (Barbituric Acid) and Its Salts imports of $58K in May 2026 ran 68% above the year-to-date monthly average of $35K.
Last updated: May 2026 dataBarbituric acid (malonylurea) is the parent heterocyclic compound from which the entire barbiturate drug class is derived, though the acid itself has no central nervous system activity and is used primarily as a chemical intermediate in pharmaceutical and dye synthesis. The US schedule provides three 10-digit lines: a general line (2933520000), one for the free acid (2933521000), and one for its salts (2933529000). Germany leads US supply, followed by China and the United Kingdom. Because barbituric acid is a precursor to controlled barbiturate substances, importers should maintain clear documentation of intended use to facilitate smooth CBP and DEA review.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Barbituric acid (malonylurea) is not itself a DEA-scheduled substance — it lacks pharmacological activity. However, many of its derivatives (such as those in heading 293353) are Schedule II, III, or IV controlled substances. Importers of barbituric acid should nonetheless maintain documentation of the intended industrial or pharmaceutical intermediate use, as CBP may query the purpose of the import given the compound's relationship to controlled barbiturates.
The free acid and its salts are classified on separate 10-digit lines, which may carry different duty rates. Importers must confirm the chemical form — whether the material is the undissociated acid or a specific salt (e.g., sodium malonylurate) — before filing entry. Misidentifying the form can result in an incorrect line selection and potential liquidation adjustment.
Monthly import values over time
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| Country | Imports | Exports | Balance |
|---|---|---|---|
| CHINA | $58K | -- | -$58K |
| EGYPT | -- | -- | -- |
| KOREA, SOUTH | -- | -- | -- |
| INDIA | -- | -- | -- |
| GERMANY | -- | -- | -- |
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share |
|---|---|---|---|---|
| 2933529000 | SALTS OF MALONYLUREA (BARBITURIC ACID) | $50K | 0.00% | 0.00% |
| 2933521000 | MALONYLUREA (BARBITURIC ACID) | $0 | -- | -- |
SALTS OF MALONYLUREA (BARBITURIC ACID)
MALONYLUREA (BARBITURIC ACID)
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2933520000 | MALONYLUREA (BARBITURIC ACID) AND ITS SALTS | $6K |
MALONYLUREA (BARBITURIC ACID) AND ITS SALTS
2 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 |
|---|---|---|---|
| Mississippi | $50K | -- | -$50K |
| South Carolina | -- | -- | -- |
| Maryland | -- | -- | -- |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| MOBILE, AL | $50K | -- | -$50K |
| CHICAGO, IL | -- | -- | -- |
| NEWARK, NJ | -- | -- | -- |