Skip to Content
MilliporeSigma
All Photos(3)

Key Documents

View All Documentation

222569

Sigma-Aldrich

Fomepizole

99%

Synonym(s):

4-Methylpyrazole

Sign Into View Organizational & Contract Pricing
All Photos(3)

About This Item

Empirical Formula (Hill Notation):
C4H6N2
CAS Number:
7554-65-6
Molecular Weight:
82.10
Beilstein/REAXYS Number:
105204
EC Number:
231-445-0
MDL number:
MFCD00005245
UNSPSC Code:
12352100
PubChem Substance ID:
24853343
NACRES:
NA.22

assay

99%

refractive index

n20/D 1.495 (lit.)

bp

99-100 °C/6 mmHg (lit.)

solubility

alcohol: soluble(lit.)
water: soluble(lit.)

density

0.993 g/mL at 25 °C (lit.)

SMILES string

Cc1cn[nH]c1

InChI

1S/C4H6N2/c1-4-2-5-6-3-4/h2-3H,1H3,(H,5,6)

InChI key

RIKMMFOAQPJVMX-UHFFFAOYSA-N

Gene Information

human ... ADH1A(124) , ADH1B(125) , ADH1C(126)

Looking for similar products? Visit Product Comparison Guide

General description

4-Methylpyrazole inhibits CYP2E1 activity[1]. It also acts as alcohol dehydrogenase inhibitor[2].

application

Fomepizole (4-Methylpyrazole) can be used as:
  • A reactant to prepare 4-methyl-1-phenyl-1H-pyrazole by reacting with bromobenzene via N-arylation using a copper catalyst.[3]
  • A starting material for the synthesis of 4-methyl-3(5)-nitropyrazole by nitration.[4]
  • A ligand in the preparation of gallium(III) complex of 4-methylpyrazole as potential antitumor and antiviral agent.[5]

Useful as an antidote in methanol and ethylene glycol poisoning.

Biochem/physiol Actions

Alcohol dehydrogenase inhibitor
Alcohol dehydrogenase inhibitor.[6]

pictograms

Exclamation mark
GHS07

signalword

Warning

Hazard Classifications

Acute Tox. 4 Oral - Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3

target_organs

Respiratory system

Storage Class

10 - Combustible liquids

wgk_germany

WGK 3

flash_point_f

204.8 °F - closed cup

flash_point_c

96 °C - closed cup

ppe

Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter

Choose from one of the most recent versions:

Certificates of Analysis (COA)

Lot/Batch Number
BGBC3873V
BGBC2403V
BGBC0278V
BGBB4937V
BGBB4937

Don't see the Right Version?

If you require a particular version, you can look up a specific certificate by the Lot or Batch number.

Search for a COA

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library

Marisa Battistella
The Annals of pharmacotherapy, 36(6), 1085-1089 (2002-05-23)
To assess the use of fomepizole in the treatment of ethylene glycol poisoning in the absence of hemodialysis. A MEDLINE search (1966-May 2001) of English-language literature pertaining to the use of fomepizole in ethylene glycol poisoning was performed. Key search
Jafar Shahraki et al.
Iranian journal of pharmaceutical research : IJPR, 12(4), 829-844 (2014-02-14)
In this research, we investigated the cytotoxic mechanisms of Cochlodinium polykrikoidescell lysate on isolated rat liver hepatocytes.This micro algae is responsible for a severe and widespread harmful algal bloom in the Persian Gulf and Gulf of Oman (2008-2009). Isolated hepatocytes
Nitropyrazoles 17. Synthesis of 1-(3, 5-dinitrophenyl)-4-methyl-3, 5-dinitropyrazole and the study of its chemical transformations
Zaitsev AA, et al.
Russian Chemical Bulletin, 58(10), 2122-2128 (2009)
Mild Conditions for Copper-Catalysed N-Arylation of Pyrazoles
Cristau H-J, et al.
European Journal of Organic Chemistry, 2004(4), 695-709 (2004)
Amanda M Barkley-Levenson et al.
Brain sciences, 11(1) (2021-01-23)
Central nervous system (CNS) hyperexcitability is a clinically significant feature of acute ethanol withdrawal. There is evidence for a genetic contribution to withdrawal severity, but specific genetic risk factors have not been identified. The gene glyoxalase 1 (Glo1) has been
View All Related Papers

Questions

Reviews

No rating value

Active Filters

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service