Phosphonic acid

CAS 13598-36-2

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$66M

Top sourceChina 46%

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 281119 · basket

EPA reports by year

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

These shares come from HS customs code 281119, which covers 30 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 46%ChinaDE 17%GermanyMY 12%MalaysiaKR 5%South KoreaTW 5%Taiwan

Japan
Netherlands
Switzerland
Norway
Jordan
Italy
Czech Republic
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.

Cymer

Lanxess

Domestic parents -- activity not disclosed (6)

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

Access Chemicals & Services

Brenntag

Buckman Laboratories

International Chemical Group

Lidochem

Show all 6

Wego Chemical Group

EPA-registered importers (5)

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

Special Materials

Synsus Private Label Partners

Thatcher

Wilbur-Ellis Holdings Ii

Zschimmer&Schwarz

Why It Matters

Sectors

AgricultureEnergyMetals & MiningConsumer ProductsPaper & PrintingCore 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 9 sectors as 8 functional roles.

•Corrosion inhibitor in Not Known or Reasonably Ascertainable (100%)Processing—incorporation into formulation, mixture, or reaction product
•Intermediate in All Other Chemical Product and Preparation Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
•Soil amendments (fertilizers) in Agriculture, Forestry, Fishing and Hunting (30%)Processing as a reactant
•Anti-scaling agent in Oil and Gas Drilling, Extraction, and Support activities (10%)Processing—incorporation into formulation, mixture, or reaction product
•Processing aids, specific to petroleum production in Oil and Gas Drilling, Extraction, and Support activities (20%)Processing—incorporation into formulation, mixture, or reaction product
•Intermediate in All Other Basic Organic Chemical Manufacturing (40%)Processing as a reactant
•Flocculating agent in Mining (except Oil and Gas) and support activities (100%)Use—non-incorporative activities
•Soil amendments (fertilizers) in Pesticide, Fertilizer, and Other Agricultural Chemical ManufacturingProcessing—incorporation into formulation, mixture, or reaction product
•Soil amendments (fertilizers) in Miscellaneous Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
•Reducing agent in Oil and Gas Drilling, Extraction, and Support activities (100%)Processing—incorporation into formulation, mixture, or reaction product
•CBI in CBICBI
•Soil amendments (fertilizers) in All Other Basic Organic Chemical Manufacturing (46%)Processing—incorporation into formulation, mixture, or reaction product

Chemical Identity

CAS13598-36-2

PubChem CID407

DTXSIDDTXSID2049715

FormulaH3O3P

Mol. Weight81.996 g/mol

SMILESOP(=O)O

Data Sources

EPA CompTox (DSSTox) · DTXSID2049715Retrieved 2026-04-06
PubChem · compound 407Retrieved 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

Phosphonic acid (CAS 13598-36-2) https://chemicalindependence.com/chemical/13598-36-2/ EPA CompTox (DSSTox): DTXSID2049715. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID2049715 PubChem: 407. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/407 EPA Chemical Data Reporting: 13598-36-2. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 13598-36-2. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 281119 for CAS 13598-36-2. Reporting year: 2024. https://usatrade.census.gov/