Diundecyl phthalate

CAS 3648-20-2

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$28M

Top sourceIndia 39%

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 291734 · basket

EPA reports by year

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

These shares come from HS customs code 291734, which covers 34 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).

IN 39%IndiaCA 27%CanadaKR 8%South KoreaJP 6%JapanDE 6%Germany

Taiwan
Czech Republic
Turkey
United Kingdom

EPA-registered manufacturers (2)

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

Teknor Apex- Haywood

Westlake

Domestic parents -- activity not disclosed (3)

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

ExxonMobil

Greenchem Industries

Teknor Apex

EPA-registered importers (6)

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

Basf Se · DE Germany

Blaser Swisslube Ag · CH Switzerland

Orbia Advance Corp S A B De C V · MX Mexico

Alphagary

Basf

Show all 6

Blaser Swisslube Holding

Why It Matters

Sectors

EnergyElectronicsConstructionMetals & MiningPlastics & RubberTextilesCore 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 12 sectors as 3 functional roles.

•Plasticizer in Computer and Electronic Product Manufacturing (2%)Processing—incorporation into article
•Plasticizer in Custom Compounding of Purchased Resins (62%)Processing—incorporation into formulation, mixture, or reaction product
•Plasticizer in Fabricated Metal Product Manufacturing (5%)Processing—incorporation into article
•Plasticizer in Primary Metal Manufacturing (48%)Processing—incorporation into article
•Plasticizer in Plastics Material and Resin Manufacturing (38%)Processing—incorporation into formulation, mixture, or reaction product
•Plasticizer in Electrical Equipment, Appliance, and Component Manufacturing (43%)Processing—incorporation into article
•Plasticizer in Services (2%)Processing—incorporation into article
•Lubricating agent in Fabricated Metal Product Manufacturing (100%)Use—non-incorporative activities
•Lubricating agent in Petroleum Lubricating Oil and Grease Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
•Plasticizer in Plastics Product ManufacturingProcessing—incorporation into article
•Plasticizer in Construction (7%)Processing—incorporation into formulation, mixture, or reaction product
•Plasticizer in All Other Chemical Product and Preparation Manufacturing (22%)Processing—incorporation into formulation, mixture, or reaction product
•Plasticizer in Textiles, apparel, and leather manufacturing (50%)Processing—incorporation into formulation, mixture, or reaction product
•Intermediate in All Other Chemical Product and Preparation ManufacturingProcessing as a reactant

Vendor Pricing

$3.16/gA2B Chem LLC

CountryUnited States

Pack$316.00 / 100 g

Purity95%

Vendors8 available

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

7 more vendors

Vendor	Country	$/g	Pack	Purity
AA BLOCKS	United States	$4.13	100 g	95%
Combi-Blocks, Inc.	United States	$4.80	25 g	95%
Aaron Chemicals LLC	Hong Kong	$4.88	25 g	95%
Angene Chemical	China → Hong Kong	$5.55	100 g	95%
Ambeed, Inc.	United States	$5.72	25 g	95%
AstaTech, Inc	United States	$13.60	5 g	95%
Angene	China → Hong Kong	$4266.67	30 mg	95%

Chemical Identity

CAS3648-20-2

PubChem CID19283

DTXSIDDTXSID7025215

FormulaC30H50O4

Mol. Weight474.7 g/mol

SMILESCCCCCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCCCCC

Data Sources

EPA CompTox (DSSTox) · DTXSID7025215Retrieved 2026-04-06
PubChem · compound 19283Retrieved 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

Diundecyl phthalate (CAS 3648-20-2) https://chemicalindependence.com/chemical/3648-20-2/ EPA CompTox (DSSTox): DTXSID7025215. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID7025215 PubChem: 19283. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/19283 EPA Chemical Data Reporting: 3648-20-2. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 3648-20-2. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 291734 for CAS 3648-20-2. Reporting year: 2024. https://usatrade.census.gov/