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Dioctyl sodium sulfosuccinate

CAS 1639-66-3

Butanedioic acid, 2-sulfo-, 1,4-dioctyl ester, sodium salt (1:1)

Molecular structure of 1639-66-3
1 Na⁺
US productionNot reported
Import value, 2024$139M
Top sourceChina 67%

This chemical is listed as active in US commerce, but no company reported it to EPA’s survey for 2019 or 2023. Sites may have made or imported less than the threshold amount, or none.

Why supply is unknown

Production is reported production, not a complete census of factories. Import value and source-country shares describe a shared customs category, not a separate chemical measurement.

Where It Comes From

Customs basis: HS 291719 · basket

These shares come from HS customs code 291719, which covers 176 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
CN 67%ChinaCA 13%CanadaAT 4%AustriaIN 4%IndiaJP 4%Japan

Why It Matters

No EPA sector or FDA product records name a use for this chemical.

Chemical Identity

CAS1639-66-3
PubChem CIDNot recorded
DTXSIDDTXSID7041881
FormulaC20H37NaO7S
Mol. Weight444.56 g/mol
SMILES[Na+].CCCCCCCCOC(=O)CC(C(=O)OCCCCCCCC)S([O-])(=O)=O

Data Sources

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Brief citations

Dioctyl sodium sulfosuccinate (CAS 1639-66-3) https://chemicalindependence.com/chemical/1639-66-3/ EPA TSCA Inventory: CAS 1639-66-3. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory US Census international trade: HS 291719 for CAS 1639-66-3. Reporting year: 2024. https://usatrade.census.gov/