[1,2,4]Triazolo[4,3-a]pyridin-3(2H)-one

Modify Date: 2025-08-21 20:43:50

[1,2,4]Triazolo[4,3-a]pyridin-3(2H)-one Structure
[1,2,4]Triazolo[4,3-a]pyridin-3(2H)-one structure
 Common Name [1,2,4]Triazolo[4,3-a]pyridin-3(2H)-one
CAS Number 6969-71-7 Molecular Weight 135.123
Density 1.5±0.1 g/cm3 Boiling Point N/A
Molecular Formula C6H5N3O Melting Point 231°C
MSDS USA Flash Point N/A
Symbol GHS07
GHS07		 Signal Word Warning

 Names

Name 1,2,4-Triazolo[4,3-a]pyridin-3(2H)-one,
Synonym More Synonyms

 Chemical & Physical Properties

Density 1.5±0.1 g/cm3
Melting Point 231°C
Molecular Formula C6H5N3O
Molecular Weight 135.123
Exact Mass 135.043259
PSA 50.16000
LogP -1.17
Index of Refraction 1.739
Storage condition 2-8°C

 Safety Information

Symbol GHS07
GHS07
Signal Word Warning
Hazard Statements H315-H319-H335
Precautionary Statements P261-P305 + P351 + P338
Hazard Codes Xi
Risk Phrases R36/37/38
Safety Phrases S26-S36
RIDADR NONH for all modes of transport
HS Code 2933990090

 Synthetic Route

2-Chloropyridine structure

2-Chloropyridine

CAS#:109-09-1

Semicarbazide hydrochloride structure

Semicarbazide h...

CAS#:563-41-7

~49%

[1,2,4]Triazolo[4,3-a]pyridin-3(2H)-one Structure

[1,2,4]Triazolo...

CAS#:6969-71-7

Literature: AUSPEX PHARMACEUTICALS, INC. Patent: US2009/209550 A1, 2009 ; Location in patent: Page/Page column 25-26 ;
dl-1,2-diphenyl-1,2-ethanedithiol structure

dl-1,2-diphenyl...

CAS#:4231-61-2

~69%

[1,2,4]Triazolo[4,3-a]pyridin-3(2H)-one Structure

[1,2,4]Triazolo...

CAS#:6969-71-7

Literature: Rombouts, Frederik; Franken, Dennis; Martinez-Lamenca, Carolina; Braeken, Mirielle; Zavattaro, Chiara; Chen, Jinsheng; Trabanco, Andres A. Tetrahedron Letters, 2010 , vol. 51, # 37 p. 4815 - 4818
2-Chloropyridine structure

2-Chloropyridine

CAS#:109-09-1

N/A structure

N/A

CAS#:4426-72-6

~%

[1,2,4]Triazolo[4,3-a]pyridin-3(2H)-one Structure

[1,2,4]Triazolo...

CAS#:6969-71-7

Literature: US4465683 A1, ;
2-Hydrazinylpyridine structure

2-Hydrazinylpyridine

CAS#:4930-98-7

Urea structure

Urea

CAS#:57-13-6

~57%

[1,2,4]Triazolo[4,3-a]pyridin-3(2H)-one Structure

[1,2,4]Triazolo...

CAS#:6969-71-7

Literature: Sakai, Norio; Funabashi, Makoto; Minakata, Satoshi; Ryu, Ilhyong; Komatsu, Mitsuo Heterocycles, 2000 , vol. 53, # 2 p. 265 - 270
2-Bromopyridine structure

2-Bromopyridine

CAS#:109-04-6

~%

[1,2,4]Triazolo[4,3-a]pyridin-3(2H)-one Structure

[1,2,4]Triazolo...

CAS#:6969-71-7

Literature: Heterocycles, , vol. 53, # 2 p. 265 - 270
1-acetyl-1,2,4-triazolo[4,3-a]pyridinium-3-olate structure

1-acetyl-1,2,4-...

CAS#:51330-53-1

~%

acetic acid structure

acetic acid

CAS#:64-19-7

[1,2,4]Triazolo[4,3-a]pyridin-3(2H)-one Structure

[1,2,4]Triazolo...

CAS#:6969-71-7

Literature: Bulletin of the Chemical Society of Japan, , vol. 56, # 10 p. 2969 - 2973
Diethylamine structure

Diethylamine

CAS#:109-89-7

1-acetyl-1,2,4-triazolo[4,3-a]pyridinium-3-olate structure

1-acetyl-1,2,4-...

CAS#:51330-53-1

~%

N,N-Diethylacetamide structure

N,N-Diethylacetamide

CAS#:685-91-6

[1,2,4]Triazolo[4,3-a]pyridin-3(2H)-one Structure

[1,2,4]Triazolo...

CAS#:6969-71-7

Literature: Bulletin of the Chemical Society of Japan, , vol. 56, # 10 p. 2969 - 2973

 Customs

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

T56 ANVMNJ
T56 AN CNNJ BQ
[1,2,4]Triazolo[4,3-a]pyridin-3(2H)-one
EINECS 230-191-8
3-Hydroxytriazolo[4,3-a]pyridine
2H-[1,2,4]triazolo[4,3-a]pyridin-3-one
MFCD00022632
1,2,4-Triazolo[4,3-a]pyridin-3(2H)-one
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Chemsrc provides [1,2,4]Triazolo[4,3-a]pyridin-3(2H)-one(CAS#:6969-71-7) MSDS, density, melting point, boiling point, structure, formula, molecular weight etc. Articles of [1,2,4]Triazolo[4,3-a]pyridin-3(2H)-one are included as well.>> amp version: [1,2,4]Triazolo[4,3-a]pyridin-3(2H)-one

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