Diisooctyl phthalate

CAS 27554-26-3

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$11M

Top sourceSouth Korea 41%

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 291732 · narrow

EPA reports by year

2023: US production Confidential · Imports Confidential
2019: US production Confidential · Imports Confidential

These shares come from HS customs code 291732, which covers 4 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).

KR 41%South KoreaMX 24%MexicoCO 23%ColombiaCL 4%ChilePT 3%Portugal

Netherlands
Japan
Germany

Domestic parents -- activity not disclosed (2)

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

Eastman Chemical

Lanxess

Why It Matters

Sectors

Core 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 2 functional roles.

•Plasticizer in Plastics Product Manufacturing (100%)Processing as a reactant
•Lubricating agent in Petroleum Lubricating Oil and Grease Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product

Vendor Pricing

$0.52/gCombi-Blocks, Inc.

CountryUnited States

Pack$260.00 / 500 g

Purity95%

Vendors13 available

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

12 more vendors

Vendor	Country	$/g	Pack	Purity
A2B Chem LLC	United States	$0.56	500 g	98%
AA BLOCKS	United States	$0.59	500 g	98%
AstaTech, Inc	United States	$0.60	500 g	95%
AK Scientific Specialized	United States	$0.88	25 g	95%
AK Scientific, Inc.	United States	$1.16	25 g	98%
Aaron Chemicals LLC	Hong Kong	$1.20	25 g	—
Angene International Limited	United States	$2.23	100 g	95%
Fluorochem UK	United Kingdom	$20.02	1 g	95%
BLD Pharmatech Ltd.	China	$180.80	5 g	95%
A2B Chem LLC (1 week)	United States	$184.00	1 g	95%
AA BLOCKS (1 week)	United States	$205.00	1 g	95%
Angene Chemical	China → Hong Kong	$223.60	5 g	95%

Chemical Identity

CAS27554-26-3

PubChem CID33934

DTXSIDDTXSID0027933

FormulaC24H38O4

Mol. Weight390.6 g/mol

SMILESCC(C)CCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCC(C)C

Data Sources

EPA CompTox (DSSTox) · DTXSID0027933Retrieved 2026-04-06
PubChem · compound 33934Retrieved 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

Diisooctyl phthalate (CAS 27554-26-3) https://chemicalindependence.com/chemical/27554-26-3/ EPA CompTox (DSSTox): DTXSID0027933. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID0027933 PubChem: 33934. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/33934 EPA Chemical Data Reporting: 27554-26-3. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 27554-26-3. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 291732 for CAS 27554-26-3. Reporting year: 2024. https://usatrade.census.gov/