Tri-n-octyl trimellitate

CAS 89-04-3

Companies reported imports and no US production of this chemical to EPA for 2023.

US productionZero

Import value, 2024$316M

Import volume97.7K lb

Import dependency100%

Top sourceSouth Korea 19%

Production is reported production, not a complete census of factories. Production reporting year: 2023. Import value and source-country shares describe a shared customs category, not a separate chemical measurement.

Tri-n-octyl trimellitate · US import value by year

2013: $142M · Peak 2022: $363M · 2024: $316M · 2025: $288M

Where It Comes From

Customs basis: HS 291739 · basket

EPA reports by year

2023: US production Zero · Imports 97.7K lb
2019: US production Confidential · Imports Confidential

These shares come from HS customs code 291739, which covers 103 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 19%South KoreaCN 19%ChinaIN 18%IndiaES 13%SpainCA 9%Canada

Netherlands
Malaysia
Colombia
Switzerland
Turkey
Germany
Peru
Brazil
Sweden
Belgium
Denmark
Czech Republic
Ukraine
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.

Avient

EPA-registered importers (2)

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

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

Alphagary

Why It Matters

Sectors

Plastics & RubberConsumer Products

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.

•Plasticizer in Wholesale and Retail Trade (100%)Processing—repackaging
•Plasticizer in Plastics Material and Resin Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product

Vendor Pricing

$0.03/gAaron Chemicals LLC

CountryHong Kong

Pack$13.00 / 500 g

Purity98%

Vendors6 available

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

5 more vendors

Vendor	Country	$/g	Pack	Purity
Angene Chemical	China → Hong Kong	$0.03	500 g	98%
A2B Chem LLC	United States	$0.08	1 kg	97%
AA BLOCKS	United States	$0.09	1 kg	98%
Angene International Limited	United States	$1.23	100 g	98%
Angene	China → Hong Kong	$4266.67	30 mg	98%

Chemical Identity

CAS89-04-3

PubChem CID6960

DTXSIDDTXSID0047533

FormulaC33H54O6

Mol. Weight546.8 g/mol

SMILESCCCCCCCCOC(=O)C1=CC(=C(C=C1)C(=O)OCCCCCCCC)C(=O)OCCCCCCCC

Data Sources

EPA CompTox (DSSTox) · DTXSID0047533Retrieved 2026-04-06
PubChem · compound 6960Retrieved 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

Tri-n-octyl trimellitate (CAS 89-04-3) https://chemicalindependence.com/chemical/89-04-3/ EPA CompTox (DSSTox): DTXSID0047533. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID0047533 PubChem: 6960. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/6960 EPA Chemical Data Reporting: 89-04-3. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 89-04-3. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 291739 for CAS 89-04-3. Reporting year: 2024. https://usatrade.census.gov/