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HSChapter 29
U.S. imports of ionones and methylionones (HS 291423) totaled $2.5M in April 2026, traded with 11 countries.
Importers of Ionones and Methylionones paid $405K in duties in April 2026 — an effective duty rate of 17% on $2.4M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 2026 dataIonones and methylionones are violet-scented cyclic ketones central to the fragrance and flavor industry, used in perfumery, cosmetics, and food flavoring. Germany and Switzerland dominate US supply of this heading — reflecting the historic concentration of fine fragrance chemistry in those countries — with China also a significant source. Classified under a single US tariff line (2914230000), these compounds are sometimes referred to commercially as 'irones' or 'violet ketones,' and importers should ensure the trade name aligns with the correct chemical identity to avoid misclassification against related terpene-based aroma chemicals in other headings.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Ionones are classified as ketones under Chapter 29 rather than as terpenes under Chapter 38 or essential oils under Chapter 33. The key distinction is that ionones are chemically defined single compounds (or isomeric mixtures of defined compounds); blended or diluted fragrance preparations may shift classification to Chapter 33.
Pure ionones and methylionones are industrial/fragrance chemicals and do not trigger mandatory FSIS or APHIS admissibility review. However, if imported as part of a food-grade flavoring preparation, FDA oversight under food additive regulations may apply to the finished formulation.
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Monthly import values over time
| Country | Imports | Exports | Balance |
|---|---|---|---|
| GERMANY | $1.3M | $57K | -$1.3M |
| SWITZERLAND | $412K | $11K | -$402K |
| CHINA | $328K | $6K | -$322K |
| SPAIN | $276K | -- | -$276K |
| MEXICO | $65K | $56K | -$9K |
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 2914230000 | IONES AND METHYLIONES | $2.5M | 16.66% | $405K |
IONES AND METHYLIONES
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2914230000 | IONES AND METHYLIONES | $338K |
IONES AND METHYLIONES
4.9K 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 |
|---|---|---|---|
| New Jersey | $1.9M | $108K | -$1.7M |
| Illinois | $639K | -- | -$639K |
| Louisiana | -- | $126K | +$126K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| NEWARK, NJ | $1.7M | -- | -$1.7M |
| CHICAGO, IL | $514K | $3K | -$511K |
| JFK INTERNATIONAL AIRPORT, NY | $80K | $69K | -$11K |