U.S. exports of Unsaturated Chlorinated Derivatives of Acyclic Hydrocarbons, N.E.S. (SITC 51134) totaled $2.6M in August 2026.
Importers of Unsaturated Chlorinated Derivatives of Acyclic Hydrocarbons, N.E.S. paid $571K in duties in August 2026, an average duty rate of 30.29% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Unsaturated Chlorinated Derivatives of Acyclic Hydrocarbons, N.E.S. imports of $1.9M in August 2026 ran 70% below the year-to-date monthly average of $6.3M.
Last updated: August 2026 dataUnsaturated chlorinated acyclic derivatives not elsewhere specified form a residual grouping that captures specialty chlorinated monomers, intermediates, and reagents whose carbon chain contains at least one double or triple bond. Vinyl chloride monomer (VCM), for example, falls within the broader unsaturated chlorinated family, though major commodity volumes are typically classified at more specific headings. Importers classifying under this residual code should confirm that no more specific SITC or HTS provision applies, as misclassification between saturated and unsaturated series can trigger duty discrepancies.
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35 import shipments a month
The key structural criterion is the presence of a carbon-carbon double or triple bond in the acyclic chain. Compounds with only single carbon-carbon bonds are classified under the saturated residual (SITC 51136), while those retaining unsaturation fall here. Laboratory analysis or a supplier's certificate of analysis confirming molecular structure is typically required to support the classification.
All chemical substances imported into the US must comply with TSCA. For residual 'N.E.S.' categories, importers should verify that each specific substance is listed on the TSCA Chemical Substance Inventory and file the appropriate TSCA import certification at entry. Substances not on the Inventory may require a pre-manufacture notice or exemption before import.
Basic heading 339 of 465 in section 5
Basic heading 51134 · $2.6M of $26.2B
Exports · August 2026
destination
China and Taiwan together take 68% 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
$1.9MYoY · free account
Exports
$2.6MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $72.4M of Unsaturated Chlorinated Derivatives of Acyclic Hydrocarbons, N.E.S. and exported $20.6M.
Through August 2026. Source: U.S. Census Bureau.
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