Dibutyl phenyl phosphate

CAS 2528-36-1

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

US productionCBI

Confidential Business Information. The EPA withholds this volume because publishing it could reveal the reporting company's trade secrets.

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

Country of origin for US imports, from Census customs data (2024).

CN 66%ChinaDE 18%GermanyJP 5%JapanIN 3%IndiaCH 3%Switzerland

Poland
Canada
Taiwan
Belgium
Netherlands
Malaysia
Austria
Spain
Ireland
Mexico
South Korea
Turkey
Czech Republic
Hong Kong

Domestic parents -- activity not disclosed (1)

EPA records name a US company for this chemical but do not disclose whether the company made it here or imported it.

Polymer Additives

EPA-registered importers (1)

Companies that report making or importing this chemical to the EPA. Registration is US-centric and does not indicate import origin.

Lanxess

Why It Matters

Sectors

EnergyCore Chemicals

Downstream UsesNot recorded

FDA Shortage Status

Whether any manufacturer currently reports this drug as in shortage on the FDA Drug Shortages database. "Active Shortage" means at least one presentation has status "current."

No FDA shortage records

Industrial Uses

Used in 2 sectors as 1 functional role.

•Hydraulic fluids in All Other Basic Organic Chemical ManufacturingProcessing—incorporation into formulation, mixture, or reaction product
•Hydraulic fluids in Petroleum Lubricating Oil and Grease Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product

Vendor Pricing

$18.00/gCombi-Blocks, Inc.

CountryUnited States

Pack$180.00 / 10 g

Purity95%

Vendors5 available

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

4 more vendors

Vendor	Country	$/g	Pack	Purity
A2B Chem LLC (1 week)	United States	$25.90	10 g	95%
AA BLOCKS (1 week)	United States	$6700.00	50 mg	98%
MedChemExpress MCE	Sweden	$6751.80	50 mg	—
ChemBridge Corporation	Kazakhstan	$18000.00	5 mg	90%

Chemical Identity

CAS2528-36-1

PubChem CID17312

DTXSIDDTXSID50873428

FormulaC14H23O4P

Mol. Weight286.3 g/mol

SMILESCCCCOP(=O)(OCCCC)OC1=CC=CC=C1

Data Sources

EPA CompTox (DSSTox) · DTXSID50873428Retrieved 2026-04-06
PubChem · compound 17312Retrieved 2026-04-06
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
US Census international tradeReporting year: 2024 · Retrieved 2026-10-04

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Brief citations

Dibutyl phenyl phosphate (CAS 2528-36-1) https://chemicalindependence.com/chemical/2528-36-1/ EPA CompTox (DSSTox): DTXSID50873428. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID50873428 PubChem: 17312. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/17312 EPA Chemical Data Reporting: 2528-36-1. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 2528-36-1. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 291990 for CAS 2528-36-1. Reporting year: 2024. https://usatrade.census.gov/