Pyrido[2,3-b]pyrazine

Modify Date: 2026-07-04 14:21:56

Pyrido[2,3-b]pyrazine Structure
Pyrido[2,3-b]pyrazine structure
Common Name Pyrido[2,3-b]pyrazine
CAS Number 322-46-3 Molecular Weight 131.13500
Density 1.27 g/cm3 Boiling Point 253.9ºC at 760 mmHg
Molecular Formula C7H5N3 Melting Point 139-143 °C
MSDS N/A Flash Point 115.9ºC

 Names

This table lists Chinese names, IUPAC names and various aliases of this chemical substance.

Name Pyrido[2,3-b]pyrazine
Synonym More Synonyms

 Chemical & Physical Properties

This table shows physicochemical parameters including melting point, boiling point, density, solubility and optical rotation. Missing data is marked as N/A.

Density 1.27 g/cm3
Boiling Point 253.9ºC at 760 mmHg
Melting Point 139-143 °C
Molecular Formula C7H5N3
Molecular Weight 131.13500
Flash Point 115.9ºC
Exact Mass 131.04800
PSA 38.67000
LogP 1.02480
Index of Refraction 1.665
InChIKey YEYHFKBVNARCNE-UHFFFAOYSA-N
SMILES c1cnc2nccnc2c1

 Toxicological Information

This table summarizes toxicological test data, acute & chronic toxicity and ecological hazard parameters for this chemical.

CHEMICAL IDENTIFICATION

RTECS NUMBER :
UV1151600
CHEMICAL NAME :
Pyrido(2,3-b)pyrazine
CAS REGISTRY NUMBER :
322-46-3
BEILSTEIN REFERENCE NO. :
0111634
LAST UPDATED :
199709
DATA ITEMS CITED :
1
MOLECULAR FORMULA :
C7-H5-N3
MOLECULAR WEIGHT :
131.15
WISWESSER LINE NOTATION :
T66 BN EN JNJ

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intravenous
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
180 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
CSLNX* U.S. Army Armament Research & Development Command, Chemical Systems Laboratory, NIOSH Exchange Chemicals. (Aberdeen Proving Ground, MD 21010) Volume(issue)/page/year: NX#03516

 Safety Information

This table covers safety warnings, protective measures, incompatible substances and disposal guidelines for this compound.

Hazard Codes Xn:Harmful;
Risk Phrases R20/21/22;R36/37/38
Safety Phrases S36/37/39-S26
RTECS UV1151600
HS Code 2933990090

 Synthetic Route

This table presents publicly reported synthetic routes, reaction conditions, reactants and product information of the compound.

~87%

Pyrido[2,3-b]pyrazine Structure

Pyrido[2,3-b]py...

CAS#:322-46-3

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Literature: Venuti, Michael C. Synthesis, 1982 , # 1 p. 61 - 63

~%

Pyrido[2,3-b]pyrazine Structure

Pyrido[2,3-b]py...

CAS#:322-46-3

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Literature: Chemistry - A European Journal, , vol. 13, # 6 p. 1754 - 1762

~%

Pyrido[2,3-b]pyrazine Structure

Pyrido[2,3-b]py...

CAS#:322-46-3

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Literature: Journal of the Chemical Society, , p. 1389,1392 Journal of the Chemical Society, , p. 303,307

~%

Pyrido[2,3-b]pyrazine Structure

Pyrido[2,3-b]py...

CAS#:322-46-3

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Literature: Journal of the Chemical Society, , p. 303,307

~%

Pyrido[2,3-b]pyrazine Structure

Pyrido[2,3-b]py...

CAS#:322-46-3

Learn More
Literature: Pharmaceutical Chemistry Journal, , vol. 16, # 11 p. 824 - 826 Khimiko-Farmatsevticheskii Zhurnal, , vol. 16, # 11 p. 1329 - 1332

 Precursor & DownStream

This table lists upstream starting materials and downstream derivative products related to this chemical.

Precursor  5

DownStream  1

 Customs

This table shows customs‑related data including HS‑code, tariff and regulatory conditions for import and export.

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%

 Synonyms

This table collects all English aliases, systematic names and CAS‑related synonyms of the compound.

1,4,5-Triazanaphthalene
MFCD00053172
2,3-pyridopyrazine
Pyrido(2,3-b)pyrazine
1,4,5-trazanaphthalene
1,4,5-Triazanaphthalin
Pyrido(3,2-b)pyrazine
EINECS 206-294-9
5-azaquinoxaline

 Pyrido[2,3-b]pyrazine | FAQ

This section contains frequently‑asked‑questions about this compound, including basic parameters, properties, storage conditions and corresponding answers.

Q: What is the SMILES notation of Pyrido[2,3-b]pyrazine?
A: SMILES notation of Pyrido[2,3-b]pyrazine is c1cnc2nccnc2c1.
Q: What is the CAS number of Pyrido[2,3-b]pyrazine?
A: CAS number of Pyrido[2,3-b]pyrazine is 322-46-3.
Q: What is the InChIKey of Pyrido[2,3-b]pyrazine?
A: InChIKey of Pyrido[2,3-b]pyrazine is YEYHFKBVNARCNE-UHFFFAOYSA-N.
Q: What English synonyms does Pyrido[2,3-b]pyrazine have?
A: English synonyms of Pyrido[2,3-b]pyrazine: 1,4,5-Triazanaphthalene, MFCD00053172, 2,3-pyridopyrazine, Pyrido(2,3-b)pyrazine, 1,4,5-trazanaphthalene, 1,4,5-Triazanaphthalin, Pyrido(3,2-b)pyrazine, EINECS 206-294-9, 5-azaquinoxaline.
Q: What is the melting point of Pyrido[2,3-b]pyrazine?
A: Melting point of Pyrido[2,3-b]pyrazine is 139-143 °C.
Q: What is the polar surface area (PSA) of Pyrido[2,3-b]pyrazine?
A: Polar surface area (PSA) of Pyrido[2,3-b]pyrazine is 38.67000.
Q: What is the safety information for Pyrido[2,3-b]pyrazine?
A: Safety information for Pyrido[2,3-b]pyrazine: S36/37/39-S26.
Q: What is the molecular weight of Pyrido[2,3-b]pyrazine?
A: Molecular weight of Pyrido[2,3-b]pyrazine is 131.13500.
Q: What is the molecular formula of Pyrido[2,3-b]pyrazine?
A: Molecular formula of Pyrido[2,3-b]pyrazine is C7H5N3.
Q: What is the English name of Pyrido[2,3-b]pyrazine?
A: The English name of Pyrido[2,3-b]pyrazine is Pyrido[2,3-b]pyrazine.

 Pyrido[2,3-b]pyrazinefactory

This table lists manufacturers and suppliers of this compound, including vendor names and product supply reference information.

Shanghai Nianxing Industrial Co., Ltd
Dayang Chem (Hangzhou) Co., Ltd.
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