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Cimetidine

Drug ingredient

CAS 51481-61-9

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

Molecular structure of 51481-61-9
US productionNot reported
Import value, 2024$114M
Top sourceChina 26%

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 293329 · basket

These shares come from HS customs code 293329, which covers 173 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
CN 26%ChinaIN 17%IndiaKR 16%South KoreaDE 9%GermanyIT 9%Italy
26 FDA-registered drug labelers
A-S Medication Solutions
Amazon.com Services LLC
Aurobindo Pharma Limited
Bionpharma Inc.
Bryant Ranch Prepack
Chartwell RX, LLC
CVS Pharmacy
DARMERICA, LLC
Fagron Inc
H E B
Haleos Labs Limited
KALCHEM INTERNATIONAL INC
LETCO MEDICAL, LLC
Medisca Inc.
Medtech Products Inc.
Mylan Pharmaceuticals Inc.
Northwind Health Company, LLC
PD-Rx Pharmaceuticals, Inc.
Prestige Brands Holdings, Inc.
Professional Compounding Centers of America
Proficient Rx LP
Spectrum Laboratory Products, Inc.
Teva Pharmaceuticals USA, Inc.
Union Quimico Farmaceutica SA
Wal-Mart Stores Inc
Walgreen Company

Why It Matters

Sectors
Health
Downstream Uses

Appears in 7 drug and cosmetic product listings (FDA).

  • •Cimetidine
  • •Tagamet
  • •basic care acid reducer
  • •heartburn prevention
  • •Equate Cimetidine
  • •cimetidine 200 acid reducer
  • •heartburn relief
FDA Shortage Status
No FDA shortage records

Vendor Pricing

$0.26/gAaron Chemicals LLC
CountryHong Kong
Pack$131.00 / 500 g
Purity98%
Vendors2 available

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

1 more vendor
VendorCountry$/gPackPurity
AA BLOCKSUnited States$0.39500 g98%

Chemical Identity

CAS51481-61-9
PubChem CID2756
DTXSIDDTXSID4020329
FormulaC10H16N6S
Mol. Weight252.34 g/mol
SMILESCC1=C(N=CN1)CSCCNC(=NC)NC#N

Data Sources

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Brief citations

Cimetidine (CAS 51481-61-9) https://chemicalindependence.com/chemical/51481-61-9/ PubChem: 2756. Retrieved 2026-04-07. https://pubchem.ncbi.nlm.nih.gov/compound/2756 FDA National Drug Code directory: CAS 51481-61-9. 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 293329 for CAS 51481-61-9. Reporting year: 2024. https://usatrade.census.gov/