Pyrazine
Also known as: 1$l^{5},4-pyrazin-1-yliuM-1-yl, 1,4-Diazabenzene, 1,4-Diazine, EINECS 206-027-6, FEMA 4015, FEMA NUMBER 4015, MFCD00006122, Paradiazine, Piazine, Pyrazin, p-Diazine, pyrazine
Pyrazine (CAS 290-37-9) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C4H4N2 and a molecular weight of 80.088 g/mol. Key properties include a melting point of 50-56 °C(lit.), a boiling point of 118.6±13.0 °C at 760 mmHg, a density of 1.1±0.1 g/cm3 and a flash point of 55.6±0.0 °C. It is classified under GHS with signal word Danger and hazard statements H228, H315 — Causes skin irritation and H319 — Causes serious eye irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 290-37-9
- Jingsj CID
- J-1341179-6
- Molecular Formula
- C4H4N2
- Molecular Weight
- 80.088 g/mol
- Category
- Organic Compounds
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 50-56 °C(lit.) |
|---|---|
| Boiling Point | 118.6±13.0 °C at 760 mmHg |
| Density | 1.1±0.1 g/cm3 |
| Flash Point | 55.6±0.0 °C |
| Exact Mass | 80.037445 |
| PSA | 25.78000 |
| LogP | -0.28 |
| Vapor Pressure | 19.7±0.2 mmHg at 25°C |
| Refractive Index | 1.503 |
| Storage Conditions | Flammables area |
| Stability | Stable. Highly flammable. Incompatible with acids, oxidizing agents. |
| Additional Property | SOLUBLE |
GHS Safety & Compliance
- H228
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Customs & Trade Information
| HS Code | 2933990090 |
|---|---|
| Summary | 2933990090. heterocyclic compounds with nitrogen hetero-atom(s) only. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0% |
Frequently Asked Questions
What is the CAS number of Pyrazine?
The CAS number of Pyrazine is 290-37-9.
What are the molecular formula and molecular weight of Pyrazine?
Pyrazine has molecular formula C4H4N2 and molecular weight 80.088 g/mol.
Is Pyrazine hazardous?
Pyrazine has GHS signal word Danger and hazard statements H228; H315 — Causes skin irritation; H319 — Causes serious eye irritation.
What are the upstream and downstream products of Pyrazine?
For Pyrazine, Upstream Products: 2-Cyanopyrazine, Piperazine, Glycerol; Downstream Products: 2-(4-Methoxyphenyl)pyrazine, 2-Iodopyrazine, 2,2'-Bipyrazine.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Pyrazine (CAS 290-37-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1341179-6 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.