Diphenyl phosphorochloridate

CAS 2524-64-3

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$208M

Import volumeZero

Top sourceChina 28%

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 292090 · basket

EPA reports by year

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

These shares come from HS customs code 292090, which covers 98 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).

CN 28%ChinaKR 17%South KoreaIT 13%ItalyIN 10%IndiaDE 9%Germany

Poland
Switzerland
Ireland
Canada
Lithuania
Netherlands
Brazil
Malaysia
Hungary
Czech Republic
Saudi Arabia
Slovakia
Ukraine
Turkey

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.

Icl Specialty Products North America

Why It Matters

Sectors

Water

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

•Hydraulic fluids in Utilities (100%)Processing as a reactant

Vendor Pricing

$0.02/gAaron Chemicals LLC

CountryHong Kong

Pack$12.00 / 500 g

Purity95%

Vendors15 available

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

14 more vendors

Vendor	Country	$/g	Pack	Purity
Angene Chemical	China → Hong Kong	$0.03	1 kg	—
Fluorochem EU	Germany	$0.06	1 kg	95%
A2B Chem LLC	United States	$0.07	500 g	97%
AA BLOCKS	United States	$0.09	500 g	97%
Chemscene	United States	$0.21	1 kg	—
AK Scientific Specialized	United States	$0.21	1 kg	95%
AK Scientific, Inc.	United States	$0.25	1 kg	98%
Fluorochem UK	United Kingdom	$0.46	25 g	95%
Combi-Blocks, Inc.	United States	$0.50	100 g	97%
Sigma-Aldrich (Rush Stock)	Germany	$0.62	500 g	96%
Sigma-Aldrich	Germany	$0.62	500 g	96%
AstaTech, Inc	United States	$1.18	100 g	95%
Angene International Limited	United States	$2.68	25 g	95%
Angene	China → Hong Kong	$4266.67	30 mg	—

Chemical Identity

CAS2524-64-3

PubChem CID75654

DTXSIDDTXSID2044892

FormulaC12H10ClO3P

Mol. Weight268.63 g/mol

SMILESC1=CC=C(C=C1)OP(=O)(OC2=CC=CC=C2)Cl

Data Sources

EPA CompTox (DSSTox) · DTXSID2044892Retrieved 2026-04-06
PubChem · compound 75654Retrieved 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

Diphenyl phosphorochloridate (CAS 2524-64-3) https://chemicalindependence.com/chemical/2524-64-3/ EPA CompTox (DSSTox): DTXSID2044892. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID2044892 PubChem: 75654. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/75654 EPA Chemical Data Reporting: 2524-64-3. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 2524-64-3. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 292090 for CAS 2524-64-3. Reporting year: 2024. https://usatrade.census.gov/