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Tetrabutylphosphonium chloride

CAS 2304-30-5

U.S. production volumes are classified as confidential business information.

Molecular structure of 2304-30-5
1 Cl⁻
US productionCBI
Import value, 2024$598M
Top sourceChina 89%

At least one company claimed its 2023 production or import volume for this chemical as confidential, so EPA withholds it.

Why supply is unknown

Production is reported production, not a complete census of factories. US production volume is confidential. 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 293149 · basket

EPA reports by year
2023
US production Confidential · Imports Confidential
2019
US production Confidential · Imports Confidential

These shares come from HS customs code 293149, which covers 114 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
CN 89%ChinaIN 4%IndiaCA 3%CanadaDE 2%GermanyAR 1%Argentina
Domestic parents -- activity not disclosed (1)
Solvay

Why It Matters

Sectors
Core Chemicals
Downstream UsesNot recorded
FDA Shortage Status
No FDA shortage records

Industrial Uses

Used in 2 sectors as 2 functional roles.

  • •Intermediate in Computer and Electronic Product Manufacturing (98%)Processing as a reactant
  • •Catalyst in Pharmaceutical and Medicine Manufacturing (2%)Use—non-incorporative activities

Chemical Identity

CAS2304-30-5
PubChem CID75311
DTXSIDDTXSID4044616
FormulaC16H36ClP
Mol. Weight294.9 g/mol
SMILESCCCC[P+](CCCC)(CCCC)CCCC.[Cl-]

Data Sources

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Brief citations

Tetrabutylphosphonium chloride (CAS 2304-30-5) https://chemicalindependence.com/chemical/2304-30-5/ EPA CompTox (DSSTox): DTXSID4044616. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID4044616 PubChem: 75311. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/75311 EPA Chemical Data Reporting: 2304-30-5. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 2304-30-5. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 293149 for CAS 2304-30-5. Reporting year: 2024. https://usatrade.census.gov/