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SITCSection 5
U.S. exports of mixed alkylbenzenes & mixed alkylnaphthalenes (not elsewhere specified) (SITC 59840) totaled $39.5M in July 2026.
Importers of Mixed Alkylbenzenes & Mixed Alkylnaphthalenes (Not Elsewhere Specified) paid $7K in duties in July 2026 — an effective duty rate of 7.6% on $98K in dutiable value, based on actual customs collections rather than the published tariff schedule.
Basic heading 251 of 465 in section 5
Basic heading 59840 · $10.2M of $28.9B
Produced by alkylating benzene or naphthalene with olefins, these mixtures serve as base fluids for industrial lubricants, heat-transfer oils, and electrical insulating fluids, as well as intermediates in detergent and surfactant manufacture. The heading explicitly excludes alkylbenzenes and alkylnaphthalenes already classified under specific chemical subgroups, so importers must verify that the product's composition does not fall within those excluded categories before applying this code. Linear alkylbenzene (LAB), a key detergent intermediate, is among the most commercially significant products in this space, though its classification depends on whether it meets the specific subgroup exclusions.
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62 shipments/mo
The heading explicitly carves out materials already covered by SITC subgroups 335.2 and 511.2. Importers should obtain a detailed GC analysis or composition report from the supplier and cross-reference the product's carbon-chain distribution and degree of branching against the definitions of those excluded subgroups. When the boundary is unclear, a binding classification ruling is advisable.
Mixed alkylnaphthalenes are used primarily as base stocks for high-temperature lubricants, transformer and cable insulating oils, and process fluids in plastics manufacturing. Their thermal stability and low volatility at elevated temperatures make them preferred over mineral oils in demanding industrial applications.
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Exports · July 2026
destination
Mexico and Belgium together take 73% of it.
customs district
Census does not publish district detail for this classification system.
origin
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$10.2MYoY · Pro
Exports
$39.5MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.