Phosphorous acid, tris(methylphenyl) ester

CAS 25586-42-9

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$23M

Import volumeZero

Top sourceSingapore 52%

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 292029 · basket

EPA reports by year

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

These shares come from HS customs code 292029, which covers 28 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).

SG 52%SingaporeTW 12%TaiwanIT 9%ItalyGB 7%United KingdomES 7%Spain

Brunei
Poland

EPA-registered manufacturers (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

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

•Catalyst in Petrochemical Manufacturing (100%)Use—non-incorporative activities

Vendor Pricing

$0.33/gAA BLOCKS

CountryUnited States

Pack$163.00 / 500 g

PurityNot recorded

Vendors9 available

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

8 more vendors

Vendor	Country	$/g	Pack	Purity
A2B Chem LLC	United States	$0.58	500 g	—
Aaron Chemicals LLC	Hong Kong	$0.78	100 g	98%
Angene Chemical	China → Hong Kong	$0.85	100 g	98%
AK Scientific, Inc.	United States	$1.89	100 g	—
Angene International Limited	United States	$3.26	100 g	—
Otava, Ltd.	Ukraine	$2280.00	50 mg	95%
Otava, Ltd. (2 weeks)	Ukraine	$2724.00	50 mg	95%
Angene	China → Hong Kong	$4266.67	30 mg	98%

Chemical Identity

CAS25586-42-9

PubChem CID12106

DTXSIDDTXSID3027879

FormulaC21H21O3P

Mol. Weight352.4 g/mol

SMILESCC1=CC=C(C=C1)OP(OC2=CC=C(C=C2)C)OC3=CC=C(C=C3)C

Data Sources

EPA CompTox (DSSTox) · DTXSID3027879Retrieved 2026-04-06
PubChem · compound 12106Retrieved 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

← Back to Dashboard ← Back to Core Chemicals

Brief citations

Phosphorous acid, tris(methylphenyl) ester (CAS 25586-42-9) https://chemicalindependence.com/chemical/25586-42-9/ EPA CompTox (DSSTox): DTXSID3027879. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID3027879 PubChem: 12106. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/12106 EPA Chemical Data Reporting: 25586-42-9. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 25586-42-9. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 292029 for CAS 25586-42-9. Reporting year: 2024. https://usatrade.census.gov/