Triisooctyl phosphite

CAS 25103-12-2

EPA’s 2023 records show zero U.S. production of this chemical.

US productionZero

Import volumeCBI

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

Top sourceNo public record

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. Production reporting year: 2023.

Where It Comes From

EPA reports by year

2023: US production Zero · Imports Confidential
2019: US production 42.2K lb · Imports Zero

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.

Icc Industries

Why It Matters

Sectors

Plastics & Rubber

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.

•Stabilizing agent in Synthetic Rubber Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
•Stabilizing agent in Rubber Product Manufacturing (100%)Processing—incorporation into article

Vendor Pricing

$1.32/gAaron Chemicals LLC

CountryHong Kong

Pack$33.00 / 25 g

Purity90%

Vendors5 available

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

4 more vendors

Vendor	Country	$/g	Pack	Purity
Angene Chemical	China → Hong Kong	$1.40	25 g	90%
A2B Chem LLC (2 weeks)	United States	$1.76	25 g	90%
AA BLOCKS (2 weeks)	United States	$1.96	25 g	90%
Angene	China → Hong Kong	$4266.67	30 mg	90%

Chemical Identity

CAS25103-12-2

PubChem CID90714

DTXSIDDTXSID3051919

FormulaC24H51O3P

Mol. Weight418.6 g/mol

SMILESCC(C)CCCCCOP(OCCCCCC(C)C)OCCCCCC(C)C

Data Sources

EPA CompTox (DSSTox) · DTXSID3051919Retrieved 2026-04-06
PubChem · compound 90714Retrieved 2026-04-06
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04

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Brief citations

Triisooctyl phosphite (CAS 25103-12-2) https://chemicalindependence.com/chemical/25103-12-2/ EPA CompTox (DSSTox): DTXSID3051919. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID3051919 PubChem: 90714. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/90714 EPA Chemical Data Reporting: 25103-12-2. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 25103-12-2. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting