Pyrido[2,3-b]pyrazine

Also known as: 1,4,5-Triazanaphthalene, Pyrido(2,3-b)pyrazine, Pyridopyrazine, 5-Azaquinoxaline, 2,3-Pyridopyrazine, MFCD00053172

Pyrido[2,3-b]pyrazine (CAS 322-46-3) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C7H5N3 and a molecular weight of 131.13500 g/mol. Key properties include a melting point of 139-143 °C, a boiling point of 253.9ºC at 760 mmHg, a density of 1.27 g/cm3 and a flash point of 115.9ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 322-46-3
Jingsj CID: J-33230-9
Molecular Formula: C₇H₅N₃
Molecular Weight: 131.13500 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	139-143 °C
Boiling Point	253.9ºC at 760 mmHg
Density	1.27 g/cm3
Flash Point	115.9ºC
Exact Mass	131.04800
PSA	38.67000
LogP	1.02480
Refractive Index	1.665

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 Pyrido[2,3-b]pyrazine?

The CAS number of Pyrido[2,3-b]pyrazine is 322-46-3.

What are the molecular formula and molecular weight of Pyrido[2,3-b]pyrazine?

Pyrido[2,3-b]pyrazine has molecular formula C7H5N3 and molecular weight 131.13500 g/mol.

What are the upstream and downstream products of Pyrido[2,3-b]pyrazine?

For Pyrido[2,3-b]pyrazine, Upstream Products: trans-1,4-Dioxane-2,3-diol, 2,3-Diaminopyridine, 2,3-Dichloropyrido[2,3-b]pyrazine; Downstream Products: 1,2,3,4-tetrahydropyrido[2,3-b]pyrazine.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "Pyrido[2,3-b]pyrazine (CAS 322-46-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-33230-9 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.