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Subheading 1 of 5 in heading 2925
Subheading 292529 · $25.0M of $31.2M
U.S. imports of imines and their derivatives; salts thereof (nesoi) (HS 292529) totaled $25.0M in July 2026, traded with 29 countries.
Importers of Imines and Their Derivatives; Salts Thereof (NESOI) paid $3.3M in duties in July 2026 — an effective duty rate of 17% on $19.7M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: July 2026 dataGuanidine derivatives, aromatic imines, and related salts not elsewhere specified serve as building blocks for rubber accelerators, pharmaceutical intermediates, and specialty catalysts — end-use distinctions that are directly reflected in the seven 10-digit tariff lines under this heading. Lines 2925292000 and 2925294500 separate aromatic imines destined for drug use from other aromatic imine derivatives, affecting both duty rates and potential FDA oversight. China is the primary supplier, with Germany and France also significant sources. Aromatic compounds produced by US manufacturers may be subject to domestic-industry note provisions that shift classification.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
321 shipments/mo
Shipments of aromatic imines intended as drug intermediates or active pharmaceutical ingredients may require FDA prior notice, Drug Master File references, and compliance with current Good Manufacturing Practice (cGMP) standards. CBP may also request end-use certification to confirm the drug-use classification rather than the general aromatic imine line.
Tetramethylguanidine is a strong, non-nucleophilic base widely used as a catalyst in polyurethane and epoxy systems, distinguishing it from the rubber-accelerator and pharmaceutical-intermediate uses of other compounds in this heading. Its dedicated 10-digit line reflects sufficient trade volume to warrant separate statistical tracking.
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ImportsExports
Imports
$25.0MYoY · Pro
Exports
$7.6MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
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 |
|---|---|---|---|---|---|
| 2925299000 | Non-Arom Imines and Their Deriv, Etc NESOI | $22.7M | 12.57% | 77.52% | $2.9M |
| 2925291800 | N,N'-Diphenylguanidide; 3-Dimethylaminomethylene; | $1.3M | 24.63% | 96.01% | $327K |
| 2925296000 | Arom Imines and Derivatives Etc, Other | $616K | 14.56% | 73.80% | $90K |
| 2925297000 | Tetramethylguanidine | $300K | 17.50% | 100.00% | $53K |
| 2925292000 | Arom Imines and Deriv Etc, For Use As Drugs | $37K | 6.12% | 94.12% | $2K |
| 2925291000 | N-(4-Chloro-O-Tolyl)-N,N-Dimethylformamidine Etc | $0 | -- | -- | -- |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2925299000 | Non-Arom Imines and Their Deriv, Etc, NESOI | $7.0M |
| 2925294500 | Aromatic Imines and Derivatives; Salts Thereof | $588K |
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.
Imports · July 2026
origin
China and Germany together supply 59% of it.
customs district
destination
entry
rate provision · imports
20.6% enters free of duty; the effective duty rate is 13.31%.