Flag of the United StatesAmerican Chemical Independence

Prazosin hydrochloride

Drug ingredient

CAS 19237-84-4

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

Molecular structure of 19237-84-4
1 HCl
US productionNot reported
Import value, 2024$6.4B
Top sourceSingapore 36%

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 293499 · basket

These shares come from HS customs code 293499, which covers 575 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
SG 36%SingaporeIE 23%IrelandCN 11%ChinaCH 6%SwitzerlandIN 5%India
43 FDA-registered drug labelers
A-S Medication Solutions
Alembic Pharmaceuticals Inc.
Alembic Pharmaceuticals Limited
American Health Packaging
ANI Pharmaceuticals, Inc.
Aphena Pharma Solutions - Tennessee, LLC
ASCLEMED USA INC.
Aurobindo Pharma Limited
Biocon Pharma Inc.
Bioindustria L.I.M. SpA
Bryant Ranch Prepack
Cardinal Health 107, LLC
Coupler, LLC
DARMERICA, LLC
Direct_Rx
Exelan Pharmaceuticals
Granules India Limited
Granules Pharmaceuticals Inc.
Lannett Company, Inc.
Lifestar Pharma LLC
Major Pharmaceuticals
Marlex Pharmaceuticals Inc
MSN Organics Private Limited
Mylan Institutional Inc.
Mylan Pharmaceuticals Inc.
n.v. Ajinomoto Omnichem S.A.
NCS HealthCare of KY, LLC dba Vangard Labs
Novadoz Pharmaceuticals LLC
NuCare Pharmaceuticals,Inc.
NURAY CHEMICALS PRIVATE LIMITED
PD-Rx Pharmaceuticals, Inc.
Pfizer Ireland Pharmaceuticals Unlimited Company
Pfizer Laboratories Div Pfizer Inc
Prasco Laboratories
Preferred Pharmaceuticals Inc.
Professional Compounding Centers of America dba PCCA
Proficient Rx LP
REMEDYREPACK INC.
Safecor Health LLC
ST. MARY'S MEDICAL PARK PHARMACY
Synthokem Labs Private Limited
Teva Pharmaceuticals USA, Inc.
Viatris Pharmaceuticals LLC

Why It Matters

Sectors
Health
Downstream Uses

Appears in 3 drug and cosmetic product listings (FDA).

  • •Prazosin Hydrochloride
  • •Prazosin HCL
  • •Prazosin
FDA Shortage Status
No Shortage
Shortage History
  • to be discontinued

    Prazosin Hydrochloride Capsule

    Shortage listed since April 28, 2023

See all current drug shortages

Vendor Pricing

$2.10/gAaron Chemicals LLC
CountryHong Kong
Pack$210.00 / 100 g
Purity95%
Vendors31 available

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

30 more vendors
VendorCountry$/gPackPurity
AA BLOCKSUnited States$2.2425 g95%
Combi-Blocks, Inc.United States$2.25100 g98%
AK Scientific SpecializedUnited States$2.40100 g95%
BLD Pharmatech GmbHGermany$2.41100 g95%
BLD Pharmatech Ltd.China$2.41100 g95%
Angene ChemicalChina → Hong Kong$2.42100 g95%
A2B Chem LLCUnited States$2.59100 g95%
BLD Pharmatech Co., LimitedUnited States$2.65100 g95%
Ambeed, Inc.United States$2.65100 g95%
AK Scientific, Inc.United States$3.29100 g98%
Angene International LimitedUnited States$5.40100 g98%
AstaTech, IncUnited States$39.001 g98%
MedKoo Biosciences, IncUnited States$150.005 g98%
TargetMol ChemicalsChina → United States$163.001 g99.99%
TargetMol Chemicals EUAustria$226.00500 mg99.99%
InterbioscreenHong Kong$238.0010 g95%
MolnovaChina$450.00100 mg99%
MedChemExpress MCESweden$474.32500 mg99.93%
Apexbio Technology LLCUnited States$550.00100 mg99.93%
Cayman EuropeEstonia$675.92500 mg98%
CliniSciences GmbHSwitzerland$709.50100 mg99%
Axon MedchemNetherlands$960.00100 mg99%
Sigma-Aldrich (Rush Stock)Germany$1088.631 g99%
Sigma-AldrichGermany$1088.631 g99%
Princeton BioMolecular Research (SC)United States$2900.00100 mg90%
Vitas M Chemical LimitedHong Kong$3170.00100 mg90%
AngeneChina → Hong Kong$4266.6730 mg95%
Key Organics Ltd.United Kingdom$6900.0010 mg97%
ChemDiv, Inc.United States$7666.6715 mg90%
TimTec, LLCUnited States$14666.6730 mg99%

Chemical Identity

CAS19237-84-4
PubChem CID68546
DTXSIDDTXSID50172822
FormulaC19H22ClN5O4
Mol. Weight419.9 g/mol
SMILESCOC1=C(C=C2C(=C1)C(=NC(=N2)N3CCN(CC3)C(=O)C4=CC=CO4)N)OC.Cl

Data Sources

← Back to Dashboard← Back to Health

Brief citations

Prazosin hydrochloride (CAS 19237-84-4) https://chemicalindependence.com/chemical/19237-84-4/ PubChem: 68546. Retrieved 2026-04-07. https://pubchem.ncbi.nlm.nih.gov/compound/68546 FDA National Drug Code directory: CAS 19237-84-4. Retrieved 2026-04-25. https://open.fda.gov/data/ndc/ FDA Drug Shortages: CAS 19237-84-4. Retrieved 2026-10-04. https://www.accessdata.fda.gov/scripts/drugshortages/ US Census international trade: HS 293499 for CAS 19237-84-4. Reporting year: 2024. https://usatrade.census.gov/