4-Methylpyrazole hydrochloride
4-Methylpyrazole hydrochloride (CAS 56010-88-9) is a chemical compound with the formula C4H6N2 · HCl and a molecular weight of 118.56 g/mol. It is recognised for its role as an enzyme inhibitor, specifically acting on alcohol dehydrogenase. A key application is its use as an antidote in cases of methanol and ethylene glycol poisoning, where it helps to mitigate the toxic effects of these substances by blocking their metabolism. This compound is supplied by Tech Serve Solutions for research and industrial applications.
- IUPAC
- Fomepizole

Antidote for Poisoning
4-Methylpyrazole hydrochloride is medically employed as an antidote for poisoning caused by methanol and ethylene glycol. It functions by inhibiting alcohol dehydrogenase, thereby preventing the formation of toxic metabolites from these glycols.
Enzyme Inhibition Research
As a specific inhibitor of alcohol dehydrogenase, this compound is valuable in biochemical research. It allows scientists to study enzyme kinetics, metabolic pathways, and the physiological effects related to alcohol metabolism in various biological systems.
Biochemical Reagent
This chemical serves as a useful reagent in biochemical laboratories. Its defined inhibitory properties make it a precise tool for experiments requiring the controlled modulation of alcohol dehydrogenase activity.
| Molecular weight | 118.56 |
|---|---|
| Empirical formula | C4H6N2 · HCl |
| Assay | ≥95% |
| Storage temperature | 2-8°C |
| Application | Useful as an antidote in methanol and ethylene glycol poisoning.1 |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26-36 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is 4-Methylpyrazole hydrochloride used for?
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4-Methylpyrazole hydrochloride is primarily used as an antidote in cases of methanol and ethylene glycol poisoning. It also serves as a valuable biochemical reagent for studying alcohol dehydrogenase activity.
What are the CAS number and chemical formula for 4-Methylpyrazole hydrochloride?
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The CAS number for 4-Methylpyrazole hydrochloride is 56010-88-9, and its chemical formula is C4H6N2 · HCl.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 4-Methylpyrazole hydrochloride with an assay of ≥95%. We do not represent this product as USP, BP, or EP grade; it is suitable for research and general laboratory use.
How should 4-Methylpyrazole hydrochloride be handled safely?
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Handling requires caution due to irritant properties. Use a dust mask (N95 US type), eyeshields, and gloves. Ensure good ventilation, as it may cause respiratory irritation. Avoid breathing dust and wash hands thoroughly after handling.
Is 4-Methylpyrazole hydrochloride a controlled substance?
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The provided data does not indicate that 4-Methylpyrazole hydrochloride is a controlled substance.
How is 4-Methylpyrazole hydrochloride packed, shipped, and exported?
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4-Methylpyrazole hydrochloride is typically stored at 2-8°C. Tech Serve Solutions, as a global supplier, handles packaging, shipping, and export in compliance with all relevant regulations for chemical products.
How can I request a sample or quote for 4-Methylpyrazole hydrochloride?
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To request a sample or a quote, please contact the Tech Serve Solutions sales department through the website or by direct inquiry, specifying the product name and CAS number.
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