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Bis(2-ethylhexyl) phosphonate

CAS 3658-48-8

Used in 1 industrial sector tracked by the EPA.

Molecular structure of 3658-48-8
US production62.9K lb
Import volumeZero
Import dependency0%
Top sourceNo public record

Production is reported production, not a complete census of factories. Production reporting year: 2023. Import value and source-country shares describe a shared customs category, not a separate chemical measurement.

Where It Comes From

Customs basis: HS 292029 · basket

EPA reports by year
2023
US production 62.9K lb · Imports Zero
2019
US production Zero · Imports Zero

HS customs code 292029 covers 28 tracked chemicals in total. US Census does not break out this chemical's share, so the country-of-origin mix is not available. EPA CDR reports import dependency at the chemical level separately, shown above.

EPA-registered manufacturers (1)
Harcros Chemicals

Why It Matters

Sectors
Energy
Downstream UsesNot recorded
FDA Shortage Status
No FDA shortage records

Industrial Uses

  • •Functional fluids (closed systems) in All Other Chemical Product and Preparation Manufacturing (100%)Processing as a reactant

Chemical Identity

CAS3658-48-8
PubChem CID6327514
DTXSIDDTXSID2044927
FormulaC16H34O3P+
Mol. Weight305.41 g/mol
SMILESCCCCC(CC)CO[P+](=O)OCC(CC)CCCC

Data Sources

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Brief citations

Bis(2-ethylhexyl) phosphonate (CAS 3658-48-8) https://chemicalindependence.com/chemical/3658-48-8/ EPA CompTox (DSSTox): DTXSID2044927. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID2044927 PubChem: 6327514. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/6327514 EPA Chemical Data Reporting: 3658-48-8. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 3658-48-8. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting