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liothyronine

Drug ingredient

CAS 6893-02-3

This chemical is an active pharmaceutical ingredient used in FDA-regulated drugs.

Molecular structure of 6893-02-3
US productionNot reported
Import value, 2024$174M
Top sourceItaly 69%

This chemical is not on EPA’s Toxic Substances Control Act inventory, the list behind EPA’s production survey.

Why supply is unknown

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

Where It Comes From

Customs basis: HS 293790 · basket

These shares come from HS customs code 293790, which covers 10 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
IT 69%ItalyCN 22%ChinaDE 3%GermanyIN 2%IndiaJP 2%Japan
16 FDA-registered drug labelers
A-S Medication Solutions
Acella Pharmaceuticals, LLC
Apex Energetics Inc.
Asclemed USA, Inc.
Bryant Ranch Prepack
Calvin Scott & Co Inc.
Deseret Biologicals
Deseret Biologicals, Inc.
DIRECT RX
Dr. Donna Restivo DC
Genus Lifesciences
Northwind Health Company, LLC
NuCare Pharmaceuticals,Inc,
Pro Weight Loss Inc.
The Wellness Center for Research and Education
Trifluent Pharma, LLC

Why It Matters

Sectors
Health
Downstream Uses

Appears in 15 drug and cosmetic product listings (FDA).

  • •NP Thyroid 60
  • •NP Thyroid
  • •EvexiTHROID
  • •NP Thyroid 30
  • •D3 Organ Support
  • •NP Thyroid 90
  • •Energize
  • •NP Thyroid 15
Show all 15
  • •RenThyroid
  • •NP Thyroid 120
  • •Detox III
  • •Thyro Support
  • •Thyro T3 Rescue
  • •R06 Thyroid
  • •Thyroid Formula
FDA Shortage Status
No FDA shortage records

Vendor Pricing

$14.32/gA2B Chem LLC
CountryUnited States
Pack$358.00 / 25 g
Purity98%
Vendors27 available

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

26 more vendors
VendorCountry$/gPackPurity
Aaron Chemicals LLCHong Kong$17.24100 g98%
Angene ChemicalChina → Hong Kong$19.72100 g98%
Combi-Blocks, Inc.United States$24.6025 g97%
AK Scientific SpecializedUnited States$25.6025 g95%
AA BLOCKSUnited States$27.6025 g98%
AK Scientific, Inc.United States$34.2825 g97%
Angene International LimitedUnited States$40.6825 g95%
ALFA AESARGermany$148.085 g95%
TargetMol Chemicals USUnited States$163.001 g99.33%
MedKoo Biosciences, IncUnited States$165.0010 g98%
TargetMol Chemicals EUAustria$212.00500 mg99.33%
MolnovaChina$214.00500 mg99%
MedChemExpress MCESweden$260.151 g99.82%
Cayman EuropeEstonia$392.701 g98%
Labotest KGGermany$453.001000 mg90%
Sigma-Aldrich (Rush Stock)Germany$468.425 g95%
Sigma-AldrichGermany$468.425 g95%
TargetMol ChemicalsChina → United States$480.00100 mg99.33%
Apexbio Technology LLCUnited States$2000.0025 mg98%
Otava, Ltd. (2 weeks)Ukraine$2724.0050 mg90%
AngeneChina → Hong Kong$4266.6730 mg98%
Ramidus ABSweden$6720.0050 mg—
A2B Chem LLC (1 week)United States$46000.0010 mg98%
AA BLOCKS (1 week)United States$50800.0010 mg98%
A2B Chem LLC (2 weeks)United States$356600.005 mg97%
AA BLOCKS (2 weeks)United States$380600.005 mg97%

Chemical Identity

CAS6893-02-3
PubChem CID5920
DTXSIDDTXSID8023216
FormulaC15H12I3NO4
Mol. Weight650.97 g/mol
SMILESC1=CC(=C(C=C1OC2=C(C=C(C=C2I)CC(C(=O)O)N)I)I)O

Data Sources

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Brief citations

liothyronine (CAS 6893-02-3) https://chemicalindependence.com/chemical/6893-02-3/ PubChem: 5920. Retrieved 2026-04-07. https://pubchem.ncbi.nlm.nih.gov/compound/5920 FDA National Drug Code directory: CAS 6893-02-3. Retrieved 2026-04-25. https://open.fda.gov/data/ndc/ FDA National Drug Code directory: bulk match. Retrieved 2026-04-07. https://open.fda.gov/data/ndc/ US Census international trade: HS 293790 for CAS 6893-02-3. Reporting year: 2024. https://usatrade.census.gov/