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HSChapter 29
U.S. imports of carboxylic acids with additional oxygen functions, nesoi (HS 291899) totaled $23.8M in July 2026, traded with 24 countries.
Importers of Carboxylic Acids with Additional Oxygen Functions, NESOI paid $3.1M in duties in July 2026 — an effective duty rate of 14% on $21.9M in dutiable value, based on actual customs collections rather than the published tariff schedule. Carboxylic Acids with Additional Oxygen Functions, NESOI imports of $23.8M in July 2026 ran 15% below the year-to-date monthly average of $28.0M.
Last updated: July 2026 dataPhenoxyacetic acid herbicides such as 2,4-D (2918992010) and MCPA (2918992015), aromatic drug substances (2918993000), and odoriferous or flavoring compounds (2918993500) all share this heading, making it one of the more internally diverse residual categories in Chapter 29. Pesticide-classified lines are subject to EPA registration requirements for the active ingredient, while the aromatic drug line triggers FDA oversight. India and China together dominate US import supply, reflecting their roles as leading producers of both agrochemical and pharmaceutical intermediates.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
197 shipments/mo
2,4-D is a registered pesticide active ingredient under FIFRA. Importers must ensure the product is covered by a valid EPA pesticide registration, and shipments may be subject to EPA review at the port of entry. Labeling, tolerance, and registration status must be confirmed before importation; non-compliant shipments can be refused entry or detained. Consult a licensed customs broker and regulatory counsel familiar with EPA pesticide import requirements.
Line 2918993000 covers aromatic compounds that are themselves drug substances — finished or bulk active pharmaceutical ingredients — rather than chemical intermediates used in drug synthesis. This distinction affects FDA admissibility review: drug substances require the foreign manufacturer to be registered with FDA and comply with cGMP, whereas chemical intermediates not yet at drug-substance stage face a different regulatory pathway. The end-use and stage of manufacture are the key classification determinants.
Subheading 1 of 17 in heading 2918
Subheading 291899 · $23.8M of $108.6M
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ImportsExports
Imports
$23.8MYoY · Pro
Exports
$4.2MYoY · 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 |
|---|---|---|---|---|---|
| 2918992050 | Aromatic Pesticides, NESOI | $10.6M | 18.42% | 100.00% | $2.0M |
| 2918995000 | Non-Aromatic Carboxylic Acids W/ Add Oxyg Func Etc | $4.9M | 4.93% | 100.56% | $243K |
| 2918992010 | 2,4-Dichlorophenoxyacetic Acid; Its Salts and Ests | $3.7M | 12.04% | 99.73% | $449K |
| 2918993000 | Aromatic Drugs | $1.8M | 0.00% | 0.00% | -- |
| 2918992015 | 2-Methyl-4-Chlorophenoxyacetic | $1.1M | 16.50% | 100.00% | $175K |
| 2918994350 | Prod Des in Note 3 Sect 6 W/Carboxylic Acids | $969K | 19.33% | 94.78% | $187K |
| 2918991400 | 2-(4-Chloro-2-Methyl-Phenoxy)-Propionic Acid Etc.. | $302K | 10.00% | 100.00% | $30K |
| 2918994700 | Other Aromat Carboxy Acid With Add Oxy Funct, Etc | $285K | 6.49% | 62.22% | $19K |
| 2918993500 | Aromatic Odoriferous or Flavoring Compounds | $100K | 18.25% | 114.41% | $18K |
| 2918990600 | 1-Hydroxy-6-Octadecyloxy-E-Naphthalencarboxylic | $25K | 10.00% | 100.00% | $2K |
| 2918990500 | Para-Anisic Acid; Clofibrate;3-Phenoxybenzoic Acid | $8K | 42.02% | 100.00% | $3K |
| 2918994300 | Prod Des in Note 3 Sect 6 W/Carboxylic Acids | $0 | -- | -- | -- |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
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
India and China together supply 75% of it.
customs district
destination
entry
rate provision · imports
8.3% enters free of duty; the effective duty rate is 12.95%.