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1,10-Phenanthroline

CAS 66-71-7

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

Molecular structure of 66-71-7
US productionCBI
Import value, 2024$1.4B
Import volumeZero
Top sourceIreland 33%

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 293399 · basket

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

These shares come from HS customs code 293399, which covers 518 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
IE 33%IrelandCN 26%ChinaIN 11%IndiaDE 9%GermanyIT 4%Italy
EPA-registered manufacturers (1)
Vanderbilt Chemicals

Why It Matters

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

Industrial Uses

  • •Drier in Paint and Coating Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product

Vendor Pricing

$0.17/gAaron Chemicals LLC
CountryHong Kong
Pack$172.00 / 1 kg
Purity98%
Vendors36 available

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

35 more vendors
VendorCountry$/gPackPurity
Angene ChemicalChina → Hong Kong$0.19500 g98%
AA BLOCKSUnited States$0.20500 g98%
A2B Chem LLCUnited States$0.20500 g98%
Ambeed, Inc.United States$0.28500 g98%
AK Scientific SpecializedUnited States$0.28500 g98%
AstaTech, IncUnited States$0.29100 g98%
Combi-Blocks, Inc.United States$0.30500 g98%
Fluorochem UKUnited Kingdom$0.40500 g97%
Fluorochem EUGermany$0.41500 g97%
AK Scientific, Inc.United States$0.48500 g99%
Manchester OrganicsUnited Kingdom$0.5650 g98%
Apollo Scientific USUnited Kingdom$0.66100 g98%
Biopharma PEG Scientific Inc.United States$0.85500 g98%
Angene International LimitedUnited States$1.0825 g98%
Sigma-Aldrich (Rush Stock)Germany$2.94100 g99%
Sigma-AldrichGermany$2.94100 g99%
ALFA AESARGermany$3.83100 g99%
Apexbio Technology LLCUnited States$19.6010 g99.03%
MedChemExpress MCESweden$23.1110 g99.99%
ChemDiv, Inc.United States$25.0025 g90%
InterbioscreenHong Kong$51.0010 g95%
TargetMol ChemicalsChina → United States$86.001 g98.85%
SpecsNetherlands$181.265 g90%
MolnovaChina$410.00100 mg99%
TargetMol Chemicals EUAustria$440.00100 mg98.85%
Labotest KGGermany$453.001000 mg90%
Otava, Ltd.Ukraine$2280.0050 mg95%
Otava, Ltd. (2 weeks)Ukraine$2724.0050 mg95%
Key Organics Ltd.United Kingdom$2740.0050 mg98%
Princeton BioMolecular Research (SC)United States$2900.00100 mg90%
Fulfilled by MolportLatvia$3000.001 mg95%
Vitas M Chemical LimitedHong Kong$3170.00100 mg90%
AngeneChina → Hong Kong$4266.6730 mg98%
AsinexNetherlands$6461.40100 mg90%
TimTec, LLC (back-ordered)United States$32000.0015 mg94%

Chemical Identity

CAS66-71-7
PubChem CID1318
DTXSIDDTXSID1025857
FormulaC12H8N2
Mol. Weight180.2 g/mol
SMILESC1=CC2=C(C3=C(C=CC=N3)C=C2)N=C1

Data Sources

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Brief citations

1,10-Phenanthroline (CAS 66-71-7) https://chemicalindependence.com/chemical/66-71-7/ EPA CompTox (DSSTox): DTXSID1025857. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID1025857 PubChem: 1318. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/1318 EPA Chemical Data Reporting: 66-71-7. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 66-71-7. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 293399 for CAS 66-71-7. Reporting year: 2024. https://usatrade.census.gov/