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U.S. imports of derivatives of malonylurea (barbituric acid) and their salts (nesoi) (HS 293354) totaled $637K in July 2026, traded with 5 countries.
Importers of Derivatives of Malonylurea (Barbituric Acid) and Their Salts (NESOI) paid $5K in duties in July 2026 — an effective duty rate of 7.8% on $62K in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: July 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.
3 shipments/mo
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.
HSChapter 29
Subheading 13 of 27 in heading 2933
Subheading 293354 · $637K of $482.5M
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 2933540000 | Derivatives of Malonylurea & Its Salts, NESOI | $637K | 0.76% | 9.72% | $5K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2933540000 | Derivatives of Malonylurea and Its Salts, NESOI | $15K |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
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ImportsExports
Imports
$637KYoY · Pro
Exports
$15KYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
Imports · July 2026
origin
Singapore and Hungary together supply 100% of it.
customs district
destination
entry
rate provision · imports
90.3% enters free of duty; the effective duty rate is 0.76%.