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Tris(2-ethylhexyl) phosphate

Drug ingredient

CAS 78-42-2

This drug ingredient has classified U.S. production volumes. EPA withholds the number as confidential business information.

Molecular structure of 78-42-2
US productionCBI
Import value, 2024$123M
Top sourceChina 66%

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 291990 · basket

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

These shares come from HS customs code 291990, which covers 77 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
CN 66%ChinaDE 18%GermanyJP 5%JapanIN 3%IndiaCH 3%Switzerland
Domestic parents -- activity not disclosed (1)
Solvay
EPA-registered importers (5)
China National Chemical · CN China
Hilti
Lanxess
Newmarket
Syngenta Crop Protection

Why It Matters

Sectors
Core ChemicalsHealthEnergyPlastics & RubberAgriculture
Downstream Uses

Appears in 2 drug and cosmetic product listings (FDA).

  • •Plastics/BPA Detox 6044
  • •Industrial Combination 9320
FDA Shortage Status
No FDA shortage records

Industrial Uses

Used in 2 sectors as 2 functional roles.

  • •Flame retardant in Plastics Material and Resin Manufacturing (40%)Processing—incorporation into formulation, mixture, or reaction product
  • •Lubricating agent in Petroleum Lubricating Oil and Grease Manufacturing (90%)Processing—incorporation into formulation, mixture, or reaction product

Vendor Pricing

$0.04/gA2B Chem LLC
CountryUnited States
Pack$45.00 / 1 kg
Purity98%
Vendors14 available

Prices reflect listed pack sizes. Small research packs run far above bulk rates.

13 more vendors
VendorCountry$/gPackPurity
AA BLOCKSUnited States$0.051 kg98%
Aaron Chemicals LLCHong Kong$0.05500 g98%
Angene ChemicalChina → Hong Kong$0.06500 g98%
BLD Pharmatech GmbHGermany$0.061 kg98%
BLD Pharmatech Ltd.China$0.061 kg98%
BLD Pharmatech Co., LimitedUnited States$0.061 kg98%
Ambeed, Inc.United States$0.061 kg98%
MedChemExpress MCESweden$0.11500 g99.61%
AK Scientific, Inc.United States$0.181 kg99%
Combi-Blocks, Inc.United States$0.251 kg98%
Angene International LimitedUnited States$0.38500 g99%
Fulfilled by MolportLatvia$0.5010 g98%
AngeneChina → Hong Kong$4266.6730 mg98%

Chemical Identity

CAS78-42-2
PubChem CID6537
DTXSIDDTXSID0021414
FormulaC24H51O4P
Mol. Weight434.6 g/mol
SMILESCCCCC(CC)COP(=O)(OCC(CC)CCCC)OCC(CC)CCCC

Data Sources

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Brief citations

Tris(2-ethylhexyl) phosphate (CAS 78-42-2) https://chemicalindependence.com/chemical/78-42-2/ EPA CompTox (DSSTox): DTXSID0021414. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID0021414 PubChem: 6537. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/6537 EPA Chemical Data Reporting: 78-42-2. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 78-42-2. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 291990 for CAS 78-42-2. Reporting year: 2024. https://usatrade.census.gov/