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U.S. exports of cyclic polymers of aldehydes (HS 291250) totaled $48K in July 2026.
Cyclic Polymers of Aldehydes imports of $11K in July 2026 ran 90% below the year-to-date monthly average of $108K.
Last updated: July 2026 dataMetaldehyde — a cyclic tetramer of acetaldehyde used primarily as a molluscicide (slug and snail bait) in agricultural and horticultural applications — is the commercially dominant product under this heading, classified at 2912501000 in powder or crystal form. The residual line (2912505000) covers other cyclic aldehyde polymers such as paraldehyde. Switzerland and Germany lead US supply, reflecting the concentration of specialty agrochemical and fine-chemical manufacturing in those countries. Metaldehyde-containing pesticide products are subject to EPA registration requirements, though the bulk chemical intermediate itself enters under standard CBP procedures.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
1 shipments/mo
Bulk metaldehyde as a chemical intermediate (2912501000) typically enters under standard CBP procedures without requiring a pesticide registration. However, formulated metaldehyde products intended for use as pesticides must be registered with the EPA under FIFRA before they can be imported or sold in the US. Importers should clearly distinguish between the bulk chemical and finished pesticide formulations in their entry documentation.
Metaldehyde (2912501000) is a cyclic polymer of acetaldehyde (CH₃CHO) and classifies under heading 2912. Paraformaldehyde (2912600000) is a linear polymer of formaldehyde (HCHO) and classifies under a separate heading. Despite both appearing as white powders or granules, they are chemically distinct and their HTS lines are not interchangeable; a certificate of analysis confirming the monomer identity is essential for correct classification.
HSChapter 29
Subheading 9 of 10 in heading 2912
Subheading 291250 · $11K of $25.1M
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ImportsExports
Imports
$11KYoY · Pro
Exports
$48KYoY · Pro
12-mo low · imports
YoY · ProFewer than 6 of the last 12 months reported trade above $500K; the trend chart is not shown for thin series.
Through July 2026. Source: U.S. Census Bureau.
Exports · July 2026
destination
Dominican Republic and China together take 100% of it.
customs district
origin
entry
rate provision · imports
the effective duty rate is 15.50%.
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 |
|---|---|---|---|---|---|
| 2912505000 | Cyclic Polymers of Aldehydes, NESOI | $11K | 15.50% | 100.00% | $2K |
| 2912501000 | Metaldehyde | $0 | -- | -- | -- |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2912501000 | Metaldehyde (Powder or Crystal Form) | $43K |
| 2912505000 | Cyclic Polymers of Aldehydes, NESOI | $5K |
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.