Metronidazole

Also known as: 1-(2-Hydroxyethyl)-2-methyl-5-nitroimidazole, 2-(2-Methyl-5-nitro-1H-imidazol-1-yl)ethanol, 2-Methyl-5-nitroimidazole-1-ethanol, Flagyl, CLONT, Cont, Elyzol, Klion, Klont, Nida, Bexon, Eumin, Nalox, Trichazol, Metronid

Metronidazole (CAS 443-48-1) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C6H9N3O3 and a molecular weight of 171.154 g/mol. Key properties include a melting point of 159-161 °C(lit.), a boiling point of 405.4±25.0 °C at 760 mmHg, a density of 1.5±0.1 g/cm3 and a flash point of 199.0±23.2 °C. It is classified under GHS with signal word Warning and hazard statements H351 — Suspected of causing cancer. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 443-48-1
Jingsj CID: J-1318872-2
Molecular Formula: C₆H₉N₃O₃
Molecular Weight: 171.154 g/mol
Category: Organic Compounds
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	159-161 °C(lit.)
Boiling Point	405.4±25.0 °C at 760 mmHg
Density	1.5±0.1 g/cm3
Flash Point	199.0±23.2 °C
Exact Mass	171.064392
PSA	83.87000
LogP	-0.01
Vapor Pressure	0.0±1.0 mmHg at 25°C
Refractive Index	1.612
Storage Conditions	2-8°C
Stability	Stable. Incompatible with strong oxidizing agents.
Additional Property	acetic acid: 0.1 M, clear, faintly yellow \| <0.1 g/100 mL at 20 ºC

GHS Safety & Compliance

Health HazardSignal word: Warning

H351 — Suspected of causing cancer

Activity & Biological Data

Additional Information	[1]. In Schaechter, M.; Engleberg, N. C.; DiRita, V. J. et al. Schaechter's Mechanisms of Microbial Disease. Hagerstown, MD: Lippincott Williams & Wilkins. p. 28. [2]. http://www.drugs.com/monograph/metronidazole.html [3]. Cohen, S.H., et al., Clinical practice guidelines for Clostridium difficile infection in adults: 2010 update by the society for healthcare epidemiology of America (SHEA) and the infectious diseases society of America (IDSA). Infect Control Hosp Epidemiol,

Additional Information

[1]. In Schaechter, M.; Engleberg, N. C.; DiRita, V. J. et al. Schaechter's Mechanisms of Microbial Disease. Hagerstown, MD: Lippincott Williams & Wilkins. p. 28. [2]. http://www.drugs.com/monograph/metronidazole.html [3]. Cohen, S.H., et al., Clinical practice guidelines for Clostridium difficile infection in adults: 2010 update by the society for healthcare epidemiology of America (SHEA) and the infectious diseases society of America (IDSA). Infect Control Hosp Epidemiol,

Customs & Trade Information

HS Code	2933290090
Summary	2933290090. other compounds containing an unfused imidazole ring (whether or not hydrogenated) in the structure. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

Frequently Asked Questions

What is the CAS number of Metronidazole?

The CAS number of Metronidazole is 443-48-1.

What are the molecular formula and molecular weight of Metronidazole?

Metronidazole has molecular formula C6H9N3O3 and molecular weight 171.154 g/mol.

Is Metronidazole hazardous?

Metronidazole has GHS signal word Warning and hazard statements H351 — Suspected of causing cancer.

What are the upstream and downstream products of Metronidazole?

For Metronidazole, Upstream Products: Metronidazole benzoate, benzoic acid, Ethylene oxide; Downstream Products: 4-Amino-3,5-dimethyl-4H-1,2,4-triazole, 1-(2-bromoethyl)-2-methyl-5-nitro-1H-imidazole.

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

Last updated: 8/21/2026

How to cite: Jingsj. "Metronidazole (CAS 443-48-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1318872-2 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.