Pyrazine

Name: Pyrazine
Brand: Vaqora Chemicals
SKU: VQ-039204

About Pyrazine

Listed under CAS 290-37-9, Pyrazine is a diazine derivative available from Vaqora Chemicals. Formula C4H4N2, molecular weight 80.09 g/mol. It is also known as 1,4-Diazine or p-Diazine.

Store in a tightly closed container in a cool, dry and well-ventilated place. The GHS classification uses the signal word “Danger”, so appropriate gloves, eye protection and ventilation are recommended.

It is commonly used for organic synthesis and API synthesis. It is used across pharmaceutical manufacturing and academic and industrial research.

We offer Pyrazine in 100 mg, 250 mg, 1 g and 5 g packs with a batch-specific COA, and ship to customers worldwide. A Safety Data Sheet (SDS) and technical specifications are available on request. Custom pack sizes, bulk quantities and specific analytical data can be arranged on request.

Typical applications

Organic synthesis
API synthesis

Industries

Specifications & identifiers

Chemical identifiers
Product name	Pyrazine
Catalogue No.	VQ-039204
CAS Number	290-37-9
IUPAC name	pyrazine
Molecular formula	C₄H₄N₂
Molecular weight	80.09 g/mol
Exact mass	80.0374
HSN code	2933
InChIKey	KYQCOXFCLRTKLS-UHFFFAOYSA-N
SMILES	C1=CN=CC=N1
PubChem CID	9261

Physical properties
Physical form	Other
LogP (XLogP3)	-0.2
H-bond donors / acceptors	0 / 2
TPSA	25.8 Å²
Synonyms	1,4-Diazine, p-Diazine, Paradiazine, Piazine, 1,4-Diazabenzene, pyrazin, 1,4-Diazin, pyrazine phase IV, pyrazine phase III, Piazine (obsol.), 1, 4-Diazabenzene, 1,4-Diazabenzene, 1,4-Diazine, Paradiazine, Piazine, p-Diazine

Safety & hazard information (GHS)

Flammable

Harmful / irritant

Signal word: Danger

Hazard statements

H225Highly flammable liquid and vapor
H228Flammable solid
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation

Precautionary statements: P210, P233, P240, P241, P242, P243, P261, P264, P264 + P265, P271, P280, P302 + P352, P303 + P361 + P353, P304 + P340, P305 + P351 + P338, P319, P321, P332 + P317, P337 + P317, P362 + P364, P370 + P378, P403 + P233, P403 + P235, P405

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 Pyrazine?

The CAS Registry Number of Pyrazine is 290-37-9. It is also known as 1,4-Diazine, p-Diazine, Paradiazine.

What is the molecular formula and molecular weight of Pyrazine?

Pyrazine has the molecular formula C4H4N2 and a molecular weight of 80.09 g/mol. Its IUPAC name is pyrazine.

Which grade and pack sizes of Pyrazine can I order?

We supply Pyrazine, in 100 mg, 250 mg, 1 g, 5 g packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Pyrazine?

Yes. Every lot of Pyrazine 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 Pyrazine be shipped internationally?

Yes. Pyrazine 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.