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Sequestrene Fe 138

CAS 16455-61-1

U.S. production volumes are classified as confidential business information.

Molecular structure of 16455-61-1
1 Fe³⁺ · 1 Na⁺
US productionCBI
Import value, 2024$652M
Top sourceSingapore 77%

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 292250 · basket

EPA reports by year
2023
US production Confidential · Imports Confidential
2019
US production Confidential · Imports Confidential

These shares come from HS customs code 292250, which covers 76 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
SG 77%SingaporeCN 12%ChinaIT 4%ItalyIN 2%IndiaGB 1%United Kingdom
Domestic parents -- activity not disclosed (2)
Seatex
Wilbur-Ellis Holdings Ii
EPA-registered importers (8)
Basf Se · DE Germany
Basf
Haifa North America
Lidochem
Nedam
Show all 8
Special Materials
Valagro/Syngenta Biologicals
Valudor Products

Why It Matters

Sectors
AgricultureMetals & MiningPaints & Coatings
Downstream UsesNot recorded
FDA Shortage Status
No FDA shortage records

Industrial Uses

Used in 3 sectors as 3 functional roles.

  • •Chelating agent in Pesticide, Fertilizer, and Other Agricultural Chemical Manufacturing (100%)Processing—repackaging
  • •Soil amendments (fertilizers) in Pesticide, Fertilizer, and Other Agricultural Chemical Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
  • •Binder in Paint and Coating Manufacturing (11%)Processing—incorporation into formulation, mixture, or reaction product
  • •Soil amendments (fertilizers) in Miscellaneous Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product

Chemical Identity

CAS16455-61-1
PubChem CID14619669
DTXSIDDTXSID80893437
FormulaC18H16FeN2NaO6
Mol. Weight435.2 g/mol
SMILESC1=CC=C(C(=C1)C(C(=O)[O-])NCCNC(C2=CC=CC=C2[O-])C(=O)[O-])[O-].[Na+].[Fe+3]

Data Sources

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Brief citations

Sequestrene Fe 138 (CAS 16455-61-1) https://chemicalindependence.com/chemical/16455-61-1/ EPA CompTox (DSSTox): DTXSID80893437. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID80893437 PubChem: 14619669. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/14619669 EPA Chemical Data Reporting: 16455-61-1. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 16455-61-1. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 292250 for CAS 16455-61-1. Reporting year: 2024. https://usatrade.census.gov/