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SITCSection 5
U.S. imports of carbonates, n.e.s. (SITC 52379) totaled $33.7M in July 2026, traded with 39 countries.
Importers of Carbonates, N.E.S. paid $1.3M in duties in July 2026 — an effective duty rate of 6.2% on $20.2M in dutiable value, based on actual customs collections rather than the published tariff schedule. Carbonates, N.E.S. imports of $33.7M in July 2026 ran 18% above the year-to-date monthly average of $28.7M.
Last updated: July 2026 dataCarbonates not elsewhere specified under SITC 52379 encompass a diverse set of inorganic carbonate salts — including calcium carbonate (precipitated and ground), magnesium carbonate, barium carbonate, lithium carbonate, and copper carbonate — that do not have dedicated SITC headings. Lithium carbonate, a critical battery material, is among the most commercially significant compounds in this residual group and has attracted substantial trade-policy attention given its role in electric vehicle supply chains. Correct classification requires identifying the specific cation, as several carbonate salts (notably lithium carbonate) may be subject to distinct HTS provisions and, depending on origin, Section 301 or other trade-remedy measures.
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503 shipments/mo
Basic heading 118 of 465 in section 5
Basic heading 52379 · $33.7M of $28.9B
Lithium carbonate falls within the residual carbonates NES heading at the SITC level. At the HTS level it has a more specific provision, and imports from certain origins — particularly China — may be subject to Section 301 tariffs. Given lithium carbonate's strategic importance for battery manufacturing, importers should verify the current tariff treatment and any applicable exclusions with a licensed customs broker before entry.
Because the NES heading covers chemically distinct compounds with different commercial values and potentially different duty rates at the HTS level, the commercial invoice and certificate of analysis should clearly identify the chemical name, CAS number, purity, and form (anhydrous, hydrated, precipitated, ground, etc.). Vague descriptions such as 'carbonate salt' are insufficient and may trigger a customs examination or request for additional information.
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Imports · July 2026
origin
Argentina and Chile together supply 54% of it.
customs district
Census does not publish district detail for this classification system.
destination
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$33.7MYoY · Pro
Exports
$10.2MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.