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propylthiouracil

Drug ingredient

CAS 51-52-5

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

Molecular structure of 51-52-5
US productionNot reported
Import value, 2024$7.6B
Top sourceIreland 61%

This chemical is listed as active in US commerce, but no company reported it to EPA’s survey for 2019 or 2023. Sites may have made or imported less than the threshold amount, or none.

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 293359 · basket

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
IE 61%IrelandCH 30%SwitzerlandGB 2%United KingdomCN 2%ChinaIN 1%India
12 FDA-registered drug labelers
Actavis Pharma, Inc.
American Health Packaging
Bryant Ranch Prepack
Chartwell RX, LLC
Chemische Fabrik Berg GmbH
Endo USA, Inc.
HERBRAND PharmaChemicals GmbH
Macleods Pharmaceuticals Limited
Nantong Jinghua Pharmaceutical Co., Ltd.
QUAGEN PHARMACEUTICALS LLC
Spectrum Laboratory Products, Inc.
Teva Pharmaceuticals, Inc.

Why It Matters

Sectors
Health
Downstream Uses

Appears in 1 drug and cosmetic product listings (FDA).

  • •Propylthiouracil
FDA Shortage Status
No FDA shortage records

Vendor Pricing

$0.26/gAaron Chemicals LLC
CountryHong Kong
Pack$132.00 / 500 g
Purity99%
Vendors32 available

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

31 more vendors
VendorCountry$/gPackPurity
Angene ChemicalChina → Hong Kong$0.29500 g98%
A2B Chem LLCUnited States$0.30500 g97%
AA BLOCKSUnited States$0.34500 g97%
ChemsceneUnited States$0.361 kg—
Fulfilled by MolportLatvia$0.3625 g—
BLD Pharmatech Co., LimitedUnited States$0.361 kg97%
BLD Pharmatech GmbHGermany$0.361 kg97%
BLD Pharmatech Ltd.China$0.361 kg97%
Ambeed, Inc.United States$0.361 kg97%
Fluorochem EUGermany$0.7725 g95%
Fluorochem UKUnited Kingdom$0.8025 g95%
AstaTech (2 weeks)United States$0.92100 g95%
AK Scientific SpecializedUnited States$1.00100 g95%
AK Scientific, Inc.United States$1.37100 g98%
Angene International LimitedUnited States$2.46100 g98%
Cayman EuropeEstonia$3.08100 g98%
Sigma-Aldrich (Rush Stock)Germany$3.54100 g—
Sigma-AldrichGermany$3.54100 g—
MedChemExpress MCESweden$7.9910 g99.88%
HTS Biochemie InnovationenGermany$20.001 g95%
MedKoo Biosciences, IncUnited States$95.0010 g98%
MolnovaChina$156.00500 mg99%
Apexbio Technology LLCUnited States$172.00500 mg99.96%
ChemDiv, Inc.United States$195.002 g90%
Labotest KGGermany$217.805000 mg90%
Otava, Ltd.Ukraine$692.00250 mg95%
SpecsNetherlands$1694.0020 mg90%
Princeton BioMolecular Research (SC)United States$2900.00100 mg90%
Life Chemicals Inc.Ukraine → Canada$3100.00100 mg90%
Vitas M Chemical LimitedHong Kong$3170.00100 mg90%
AngeneChina → Hong Kong$4266.6730 mg99%

Chemical Identity

CAS51-52-5
PubChem CID657298
DTXSIDDTXSID5021209
FormulaC7H10N2OS
Mol. Weight170.23 g/mol
SMILESCCCC1=CC(=O)NC(=S)N1

Data Sources

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Brief citations

propylthiouracil (CAS 51-52-5) https://chemicalindependence.com/chemical/51-52-5/ PubChem: 657298. Retrieved 2026-04-07. https://pubchem.ncbi.nlm.nih.gov/compound/657298 EPA TSCA Inventory: CAS 51-52-5. Retrieved 2026-04-24. https://www.epa.gov/tsca-inventory FDA National Drug Code directory: bulk match. Retrieved 2026-04-07. https://open.fda.gov/data/ndc/ US Census international trade: HS 293359 for CAS 51-52-5. Reporting year: 2024. https://usatrade.census.gov/