Pyrazine (CAS 290-37-9) Sigma-Aldrich

Pyrazine molecular structure — Molecular structure

The Sigma-Aldrich catalog lists 6 grades and pack sizes of Pyrazine (CAS 290-37-9). Pick the code you need and request a quote for price and lead time from Klar Chem.

CAS	290-37-9
Molecular formula	C4H4N2
Molecular weight	80.09 g/mol
IUPAC name	pyrazine
Synonyms	1,4-Diazine · p-Diazine · Paradiazine · Piazine · 1,4-Diazabenzene · pyrazin

Safety & Hazards (GHS) Warning

Irritant

H315 Causes skin irritation
H319 Causes serious eye irritation
H335 May cause respiratory irritation

⚠️ For information only (source: EU CLP harmonised classification and ECHA notifications, via PubChem); not a substitute for the official Safety Data Sheet (SDS).

Catalog codes and grades

Brand	Product / grade	Code
Sigma	PYRAZINE, 99+%	P56003-10G P56003-25G P56003-5G	Request Quote
Sigma	PYRAZINE, >=99%, FG	W401501-100G-K W401501-1KG-K W401501-SAMPLE-K	Request Quote

For information only; specifications and availability are confirmed at quotation. Prices are not listed.