4-Bromo-1-methyl-1H-pyrazole, 97%

About 4-Bromo-1-methyl-1H-pyrazole, 97%

4-Bromo-1-methyl-1H-pyrazole is a five-membered N-heterocycle carrying the CAS registry number 15803-02-8 with a typical assay of 97%. The compound has the formula C4H5BrN2, corresponding to a molecular weight of 161.0 g/mol. The IUPAC name is 4-bromo-1-methylpyrazole. It is also known as 1-Methyl-4-bromopyrazole or 1H-Pyrazole, 4-bromo-1-methyl-.

It is supplied as a liquid. Key physical data: a boiling point of 185-188 °C and a density of 1.558 g/mL at 25 °C. Keep containers tightly closed in a cool, well-ventilated area away from heat and ignition sources. Under GHS it is labelled “Danger”, so handle it with suitable PPE and consult the SDS.

Key uses span organic synthesis and API synthesis. Typical end-use sectors are pharmaceutical manufacturing and academic and industrial research.

Standard pack sizes are 5 g, 25 g and 1 kg, and every batch ships with a Certificate of Analysis (COA) and we export worldwide.

Typical applications

Organic synthesis
API synthesis

Industries

Specifications & identifiers

Chemical identifiers
Product name	4-Bromo-1-methyl-1H-pyrazole, 97%
Catalogue No.	VQ-012571
CAS Number	15803-02-8
IUPAC name	4-bromo-1-methylpyrazole
Molecular formula	C₄H₅BrN₂
Molecular weight	161 g/mol
Exact mass	159.9636
Purity / assay	97%
HSN code	29039990
InChIKey	IXJSDKIJPVSPKF-UHFFFAOYSA-N
SMILES	CN1C=C(C=N1)Br
PubChem CID	167433

Physical properties
Physical form	Liquid
Appearance	Liquid
Boiling point	185-188 °C
Density	1.558 g/mL at 25 °C
LogP (XLogP3)	0.9
H-bond donors / acceptors	0 / 1
TPSA	17.8 Å²
Synonyms	1-Methyl-4-bromopyrazole, 1H-Pyrazole, 4-bromo-1-methyl-, 4-bromo-1-methyl-pyrazole, 1-Mehtyl-4-bromo-1H-pyrazole, pyrazole, 4-bromo-1-methyl-, 4-Bromo-1-methyl-1H-pyrazole, 97%

Safety & hazard information (GHS)

Corrosive

Harmful / irritant

Signal word: Danger

Hazard statements

H315Causes skin irritation
H318Causes serious eye damage
H335May cause respiratory irritation

Precautionary statements: P261, P264, P264 + P265, P271, P280, P302 + P352, P304 + P340, P305 + P354 + P338, P317, P319, P321, P332 + P317, P362 + P364, P403 + P233, P405, P501

Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Frequently asked questions

What is the CAS number of 4-Bromo-1-methyl-1H-pyrazole, 97%?

The CAS Registry Number of 4-Bromo-1-methyl-1H-pyrazole, 97% is 15803-02-8. It is also known as 1-Methyl-4-bromopyrazole, 1H-Pyrazole, 4-bromo-1-methyl-, 4-bromo-1-methyl-pyrazole.

What is the molecular formula and molecular weight of 4-Bromo-1-methyl-1H-pyrazole, 97%?

4-Bromo-1-methyl-1H-pyrazole, 97% has the molecular formula C4H5BrN2 and a molecular weight of 161 g/mol. Its IUPAC name is 4-bromo-1-methylpyrazole.

Which grade and pack sizes of 4-Bromo-1-methyl-1H-pyrazole, 97% can I order?

We supply 4-Bromo-1-methyl-1H-pyrazole, 97% in (97%) grade, in 5 g, 25 g, 1 kg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with 4-Bromo-1-methyl-1H-pyrazole, 97%?

Yes. Every lot of 4-Bromo-1-methyl-1H-pyrazole, 97% is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can 4-Bromo-1-methyl-1H-pyrazole, 97% be shipped internationally?

Yes. 4-Bromo-1-methyl-1H-pyrazole, 97% is classified as hazardous, so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.