Diphosphoric acid, compd. with piperazine (1:1)

CAS 66034-17-1

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$7.6B

Top sourceIreland 61%

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 293359 · basket

EPA reports by year

2023: US production Confidential · Imports Confidential
2019: US production Zero · Imports 1.0M lb

These shares come from HS customs code 293359, which covers 295 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).

IE 61%IrelandCH 30%SwitzerlandGB 2%United KingdomCN 2%ChinaIN 1%India

Israel
Bulgaria
Japan
Spain
Sweden
Canada
Taiwan
Finland
Portugal
Mexico
Belgium
Hungary
Austria
Brazil
Ukraine
Croatia
Malta
South Korea
South Africa
Denmark
Czech Republic
Malaysia
Argentina
Poland
Cameroon
Australia
Hong Kong
Slovakia
Latvia

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.

Amfine Chemical

Why It Matters

Sectors

ConstructionPlastics & 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.

•Flame retardant in Plastics Material and Resin ManufacturingProcessing—incorporation into formulation, mixture, or reaction product
•Flame retardant in ConstructionProcessing—incorporation into formulation, mixture, or reaction product

Chemical Identity

CAS66034-17-1

PubChem CID21989140

DTXSIDDTXSID10886791

FormulaC4H14N2O7P2

Mol. Weight264.11 g/mol

SMILESC1CNCCN1.OP(=O)(O)OP(=O)(O)O

Data Sources

EPA CompTox (DSSTox) · DTXSID10886791Retrieved 2026-04-06
PubChem · compound 21989140Retrieved 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

Diphosphoric acid, compd. with piperazine (1:1) (CAS 66034-17-1) https://chemicalindependence.com/chemical/66034-17-1/ EPA CompTox (DSSTox): DTXSID10886791. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID10886791 PubChem: 21989140. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/21989140 EPA Chemical Data Reporting: 66034-17-1. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 66034-17-1. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 293359 for CAS 66034-17-1. Reporting year: 2024. https://usatrade.census.gov/