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U.S. imports of salts and esters of tartaric acid (HS 291813) totaled $1.2M in July 2026, traded with 12 countries.
Subheading 13 of 17 in heading 2918
Subheading 291813 · $1.2M of $108.6M
Importers of Salts and Esters of Tartaric Acid paid $116K in duties in July 2026 — an effective duty rate of 10% on $1.2M in dutiable value, based on actual customs collections rather than the published tariff schedule. Salts and Esters of Tartaric Acid imports of $1.2M in July 2026 ran 49% above the year-to-date monthly average of $807K.
Potassium 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.
16 shipments/mo
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.
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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 |
|---|---|---|---|---|---|
| 2918132000 | Potassium Bitartrate (Cream of Tarter) | $1.1M | 10.00% | 100.00% | $108K |
| 2918133000 | Potassium Sodium Tartrate (Rochelle Salts) | $71K | 10.00% | 100.00% | $7K |
| 2918135000 | Other Esters of Tartaric Acid | $52K | 3.48% | 42.27% | $2K |
| 2918131000 | Potassium Antimony Tartrate (Tarter Emetic) | $0 | -- | -- | -- |
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 | $40K |
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.
ImportsExports
Imports
$1.2MYoY · Pro
Exports
$40KYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
Imports · July 2026
origin
Spain and Chile together supply 90% of it.
customs district
destination
entry
rate provision · imports
2.5% enters free of duty; the effective duty rate is 9.72%.