U.S. imports of Salts and Esters of Tartaric Acid (HS 291813) totaled $291K in September 2026, imported from 12 countries.
Importers of Salts and Esters of Tartaric Acid paid $41K in duties in September 2026, an average duty rate of 14.13% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Salts and Esters of Tartaric Acid imports of $291K in September 2026 ran 63% below the year-to-date monthly average of $778K.
Last updated: September 2026 dataPotassium bitartrate — widely known in the food industry as cream of tartar — is the commercially dominant product in this heading, classified at 2918132000, but the heading also covers potassium antimony tartrate (tartar emetic, 2918131000), Rochelle salts (potassium sodium tartrate, 2918133000), and other tartaric acid esters (2918135000). Spain leads US imports, consistent with its role as a major wine-producing nation, with Malaysia and Chile also significant sources. Potassium antimony tartrate carries additional regulatory significance as an antiparasitic pharmaceutical precursor, and importers of that specific compound should confirm FDA or DEA requirements before shipment.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
15 import shipments a month
Potassium antimony tartrate (2918131000) has pharmaceutical and veterinary applications and may be subject to FDA review depending on its intended use. Importers should verify whether the shipment is classified as a drug or drug precursor, as that determination affects the applicable admissibility pathway and required documentation. Consulting a licensed customs broker or regulatory counsel before importation is advisable.
Malaysia's presence in this heading likely reflects re-export or further processing of tartaric acid derivatives rather than primary wine-byproduct recovery. Importers sourcing from non-wine-producing countries should scrutinize country-of-origin documentation carefully, as the actual origin of the underlying tartaric acid feedstock may differ from the country of export.
Subheading 13 of 17 in heading 2918
Subheading 291813 · $291K of $109.7M
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ImportsExports
Imports
$291KYoY · free account
Exports
—YoY · free account
12-mo low · imports
Low · free accountOver the twelve months to September 2026, the U.S. imported $9.6M of Salts and Esters of Tartaric Acid.
Fewer than 6 of the last 12 months reported trade, or the latest month was under $500K; the trend chart is not shown for thin series.
Through September 2026 · exports 11 of 12 months reported. 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 | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 2918132000 | Potassium Bitartrate (Cream of Tarter) | $712K | 10.02% | 100.00% | $71K |
| 2918135000 | Other Esters of Tartaric Acid | $350K | 4.78% | 100.00% | $17K |
| 2918131000 | Potassium Antimony Tartrate (Tarter Emetic) | — | -- | -- | -- |
| 2918133000 | Potassium Sodium Tartrate (Rochelle Salts) | — | -- | -- | -- |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2918130000 | Salts and Esters of Tartaric Acid | $81K |
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 · September 2026
origin
Spain and Chile together supply 77% of it. China pays 37.5% duty; France 9.4%.
customs district
destination
entry
rate provision · imports
duty collected equals 14.13% of imports for consumption.