P

Pyrazine

IUPAC: pyrazine

C4H4N2 Organic Compounds CAS 290-37-9
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Quick Reference
Formula / NotationC4H4N2
CAS Number290-37-9
Molecular Weight80.09
Melting Point54 - 56 °C
Boiling Point115.00 to 116.00 °C. @ 760.00 mm Hg
Solubilityfreely soluble in water, organic solvents
AppearanceSolid with a strong odor like pyridine; [Merck Index] White crystalline solid with a strong odor; [Alfa Aesar MSDS]
Also Known As290-37-9; 1,4-Diazine; p-Diazine; Paradiazine; Piazine; 1,4-Diazabenzene; pyrazin; MFCD00006122; 1,4-Diazin; NSC-400221
CategoryOrganic Compounds

What is Pyrazine?

Pyrazine is a diazine that is benzene in which the carbon atoms at positions 1 and 4 have been replaced by nitrogen atoms. It has a role as a Daphnia magna metabolite. It is a member of pyrazines and a diazine.

Formula & Notation

C4H4N2

IUPAC Name: pyrazine

Other Names / Synonyms: 290-37-9; 1,4-Diazine; p-Diazine; Paradiazine; Piazine; 1,4-Diazabenzene; pyrazin; MFCD00006122; 1,4-Diazin; NSC-400221

Properties & Characteristics

Appearance: Solid with a strong odor like pyridine; [Merck Index] White crystalline solid with a strong odor; [Alfa Aesar MSDS]. Molecular formula: C4H4N2. Molecular weight: 80.09 g/mol. Boiling point: 115.00 to 116.00 °C. @ 760.00 mm Hg. Melting point: 54 - 56 °C. Solubility: freely soluble in water, organic solvents. LogP: -0.2.

Physical Data

PropertyValue
Melting Point54 - 56 °C
Boiling Point115.00 to 116.00 °C. @ 760.00 mm Hg
Molecular Weight80.09
Solubilityfreely soluble in water, organic solvents
AppearanceSolid with a strong odor like pyridine; [Merck Index] White crystalline solid with a strong odor; [Alfa Aesar MSDS]

Uses & Applications

Used as an industrial feedstock, solvent, pharmaceutical intermediate, flavoring agent, or chemical building block.

Safety Information

Flammable or irritant. Many organic compounds are flammable liquids or vapours. Keep away from ignition sources. Consult SDS for specific hazard data.

Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.

Key Facts

Term Pyrazine
Formula C4H4N2
CAS Number 290-37-9
Molecular Weight 80.09
Synonyms 290-37-9; 1,4-Diazine; p-Diazine; Paradiazine; Piazine; 1,4-Diazabenzene; pyrazin; MFCD00006122; 1,4-Diazin; NSC-400221

Frequently Asked Questions

Pyrazine is a diazine that is benzene in which the carbon atoms at positions 1 and 4 have been replaced by nitrogen atoms. It has a role as a Daphnia magna metabolite. It is a member of pyrazines and a diazine.

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Editorial standards: Chemical data is sourced from peer-reviewed literature, CAS Registry, NIST WebBook, and PubChem. Safety information reflects guidance from OSHA, ECHA, and IAEA. For educational purposes only — always consult official SDS documentation and qualified professionals before handling chemicals.