Pentasodium trihydrogen (ethane-1,2-diylbis(nitrilobis(methylene)))tetrakisphosphonate

CAS 7651-99-2

EPA’s 2019 records show zero U.S. production of this chemical.

Molecular structure of 7651-99-2 — 5 Na⁺

US productionZero

Import value, 2024$598M

Top sourceChina 89%

EPA lists this chemical for 2019 but publishes zero or no volume for both production and imports.

Production is reported production, not a complete census of factories. Production reporting year: 2019. Import value and source-country shares describe a shared customs category, not a separate chemical measurement.

Where It Comes From

Customs basis: HS 293149 · basket

EPA reports by year

2019: US production Zero · Imports Zero

These shares come from HS customs code 293149, which covers 114 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 89%ChinaIN 4%IndiaCA 3%CanadaDE 2%GermanyAR 1%Argentina

United Kingdom
Italy
Mexico
Japan
Switzerland
Hong Kong
Ukraine
Finland
Sweden
Spain
Poland
Slovakia
Netherlands
Singapore
Taiwan
South Korea
Czech Republic

Domestic parents -- activity not disclosed (2)

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

Italmatch Usa

Zschimmer&Schwarz

Why It Matters

Sectors

Energy

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

•Corrosion inhibitor in Oil and Gas Drilling, Extraction, and Support activities (100%)Processing—incorporation into formulation, mixture, or reaction product

Chemical Identity

CAS7651-99-2

PubChem CID165629

DTXSIDDTXSID4064763

FormulaC6H15N2Na5O12P4

Mol. Weight546.03 g/mol

SMILESC(CN(CP(=O)(O)[O-])CP(=O)([O-])[O-])N(CP(=O)(O)[O-])CP(=O)(O)[O-].[Na+].[Na+].[Na+].[Na+].[Na+]

Data Sources

EPA CompTox (DSSTox) · DTXSID4064763Retrieved 2026-04-06
PubChem · compound 165629Retrieved 2026-04-06
EPA Chemical Data ReportingReporting year: 2019 · Retrieved 2026-10-04
EPA Chemical Data ReportingReporting year: 2019 · Retrieved 2026-10-04
US Census international tradeReporting year: 2024 · Retrieved 2026-10-04

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Brief citations

Pentasodium trihydrogen (ethane-1,2-diylbis(nitrilobis(methylene)))tetrakisphosphonate (CAS 7651-99-2) https://chemicalindependence.com/chemical/7651-99-2/ EPA CompTox (DSSTox): DTXSID4064763. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID4064763 PubChem: 165629. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/165629 EPA Chemical Data Reporting: 7651-99-2. Reporting year: 2019. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 7651-99-2. Reporting year: 2019. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 293149 for CAS 7651-99-2. Reporting year: 2024. https://usatrade.census.gov/