Cimetidine

西咪替丁

Also known as: Guanidine, N-cyano-N'-methyl-N''-[2-[[(5-methyl-1H-imidazol-4-yl)methyl]thio]ethyl]-, 2-Cyano-1-methyl-3-[2-[[(5-methyl-1H-imidazol-4-yl)methyl]thio]ethyl]guanidine, N-Cyano-N'-methyl-N''-[2-[[(4-methyl-1H-imidazol-5-yl)methyl]thio]ethyl]guanidine, Tagamet, SKF-92334, Acinil, Brumetadina, Cimal, Dyspamet, Peptol, TAMETIN, Tratul, ULCIMET, Ulcedin

Cimetidine (CAS 51481-61-9) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C10H16N6S and a molecular weight of 252.339 g/mol. It is also known as Guanidine, N-cyano-N'-methyl-N''-[2-[[(5-methyl-1H-imidazol-4-yl)methyl]thio]ethyl]-, 2-Cyano-1-methyl-3-[2-[[(5-methyl-1H-imidazol-4-yl)methyl]thio]ethyl]guanidine and N-Cyano-N'-methyl-N''-[2-[[(4-methyl-1H-imidazol-5-yl)methyl]thio]ethyl]guanidine. Key properties include a melting point of 139-144°C, a boiling point of 476.2±55.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 241.8±31.5 °C. GHS signal word: Danger. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
51481-61-9
Jingsj CID
J-1101288-1
Molecular Formula
C10H16N6S
Chinese Name
西咪替丁
Molecular Weight
252.339 g/mol
Category
Organic Compounds
Last updated
8/21/2026

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Physicochemical Properties

Melting Point139-144°C
Boiling Point476.2±55.0 °C at 760 mmHg
Density1.3±0.1 g/cm3
Flash Point241.8±31.5 °C

GHS Safety & Compliance

Health HazardSignal word: Danger

Frequently Asked Questions

What is the CAS number of Cimetidine?

The CAS number of Cimetidine is 51481-61-9.

What are the molecular formula and molecular weight of Cimetidine?

Cimetidine has molecular formula C10H16N6S and molecular weight 252.339 g/mol.

Is Cimetidine hazardous?

Cimetidine has GHS signal word Danger.

Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.

Last updated:

How to cite: Jingsj. "Cimetidine (CAS 51481-61-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1101288-1 (accessed 2026-10-25).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.