5-Oxo-4,5-dihydro-1H-[1,2,4]triazole-3-carboxylic acid

5-Oxo-4,5-dihydro-1H-[1,2,4]triazole-3-carboxylic acid structure

CAS No.: 4538-16-3

Chemical Name:: 5-Oxo-4,5-dihydro-1H-[1,2,4]triazole-3-carboxylic acid

Synonyms: AKOS AU36-M362;ASINEX-REAG BAS 10142521;5-oxo-1,2-dihydro-1,2,4-triazole-3-carboxylic acid;5-keto-1,2-dihydro-1,2,4-triazole-3-carboxylic acid;5-Oxo-4,5-dihydro-1H-[1,2,4]triazole-3-carboxylic acid;1H-1,2,4-Triazole-3-carboxylic acid, 2,5-dihydro-5-oxo-

CBNumber:: CB4129152

Molecular Formula:: C3H3N3O3

Molecular Weight:: 129.07

MDL Number:: MFCD00526072

MOL File:: Mol file

Last updated:2026-09-12 18:52:20

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5-Oxo-4,5-dihydro-1H-[1,2,4]triazole-3-carboxylic acid Properties

Melting point	205 °C (decomp)(Solv: water (7732-18-5))
Density	2.22±0.1 g/cm3(Predicted)
storage temp.	2-8°C, stored under nitrogen
pka	-2.21±0.20(Predicted)
Appearance	White to off-white Solid

SAFETY

Risk and Safety Statements

Symbol(GHS)	GHS07
Signal word	Warning
Hazard statements	H302-H315-H319-H335
Precautionary statements	P261-P280-P301+P312-P302+P352-P305+P351+P338
Hazard Codes	Xi
HazardClass	IRRITANT

5-Oxo-4,5-dihydro-1H-[1,2,4]triazole-3-carboxylic acid price More Price(27)

Manufacturer	Product number	Product description	CAS number	Packaging	Price	Updated	Buy
Activate Scientific	AS125090	5-Oxo-4,5-dihydro-1H-[1,2,4]triazole-3-carboxylic acid 95%	4538-16-3	1g	$162	2026-06-04	Buy
Activate Scientific	AS125090	5-Oxo-4,5-dihydro-1H-[1,2,4]triazole-3-carboxylic acid 95%	4538-16-3	5g	$577	2026-06-04	Buy
Matrix Scientific	034125	5-Oxo-4,5-dihydro-1H-[1,2,4]triazole-3-carboxylic acid hydrate	4538-16-3	1.00g	$378	2026-05-18	Buy
aablocks	AA00D99C	5-Oxo-4,5-dihydro-1H-[1,2,4]triazole-3-carboxylic acid 96%	4538-16-3	250mg	$96	2026-05-28	Buy
aablocks	AA00D99C	5-Oxo-4,5-dihydro-1H-[1,2,4]triazole-3-carboxylic acid 96%	4538-16-3	1g	$235	2026-05-28	Buy

Product number	Packaging	Price	Buy
AS125090	1g	$162	Buy
AS125090	5g	$577	Buy
034125	1.00g	$378	Buy
AA00D99C	250mg	$96	Buy
AA00D99C	1g	$235	Buy

5-Oxo-4,5-dihydro-1H-[1,2,4]triazole-3-carboxylic acid Chemical Properties, Uses, Production

Uses

5-Oxo-2,5-dihydro-1H-1,2,4-triazole-3-carboxylic Acid is used in preparation of the fused tri-cyclic compound as pde3/pde4 dual inhibitor.

5-Oxo-4,5-dihydro-1H-[1,2,4]triazole-3-carboxylic acid Preparation Products And Raw materials

Raw materials

Preparation Products

5-Oxo-4,5-dihydro-1H-[1,2,4]triazole-3-carboxylic acid Suppliers

Global Suppliers ( 21)

Supplier	Tel	Email	Country	ProdList	Advantage
Wuhan Chemwish Technology Co., Ltd	86-027-67849912	sales@chemwish.com	China	35884	56
Bide Pharmatech Ltd.	400-164-7117 18317119277	product02@bidepharm.com	China	40000	60
JW & Y Pharmlab Co., Ltd.	021-64340559	xinyu_shi@jwypharmlab.com.cn	China	11999	58
Changzhou Hopschain Chemical Co.,Ltd.	85528066 13775048983	sales@hopschem.com	China	31548	55
SHANGHAI FDC-CHEMICAL CO.,LTD	021-61469567 13774476675	sales@fdc-chemical.com	China	10000	58
Shaanxi Dideu Medichem Co. Ltd	+86-29-81139210 17389186172	1077@dideu.com	China	3999	58
Shanghai Haohong Pharmaceutical Co., Ltd.	400-8210725 4008210725	malulu@leyan.com	China	54996	58
Block Chemical Technology (Shanghai) Co., LTD	021-20432219 13918097649	li_jinfei@acblock-lab.com	China	9964	58
SHAANXI?DIDEU?MEDICHEM CO.LTD	17691182729 17392216275	1073@dideu.com	China	9993	58
Aikon International Limited	025-58851090 19370895928	2850281427@qq.com	China	8014	58

Supplier	Advantage
Wuhan Chemwish Technology Co., Ltd	56
Bide Pharmatech Ltd.	60
JW & Y Pharmlab Co., Ltd.	58
Changzhou Hopschain Chemical Co.,Ltd.	55
SHANGHAI FDC-CHEMICAL CO.,LTD	58
Shaanxi Dideu Medichem Co. Ltd	58
Shanghai Haohong Pharmaceutical Co., Ltd.	58
Block Chemical Technology (Shanghai) Co., LTD	58
SHAANXI?DIDEU?MEDICHEM CO.LTD	58
Aikon International Limited	58

View Latest Price from 5-Oxo-4,5-dihydro-1H-[1,2,4]triazole-3-carboxylic acid manufacturers

Image	Update time	Product	Price	Min. Order	Purity	Supply Ability	Manufacturer
	2026-08-07	5-OXO-45-DIHYDRO-1H-[124]TRIAZOLE-3-CARBOXYLIC ACID 4538-16-3	$11.00-25.00	1KG	99%	200000KG	Shaanxi Dideu Medichem Co. Ltd

5-OXO-45-DIHYDRO-1H-[124]TRIAZOLE-3-CARBOXYLIC ACID
4538-16-3
$11.00-25.00
99%
Shaanxi Dideu Medichem Co. Ltd

5-Oxo-4,5-dihydro-1H-[1,2,4]triazole-3-carboxylic acid Spectrum

5-OXO-4,5-DIHYDRO-1H-[1,2,4]TRIAZOLE-3-CARBOXYLIC ACID(4538-16-3)¹HNMR

4538-16-3 (5-Oxo-4,5-dihydro-1H-[1,2,4]triazole-3-carboxylic acid) Related Search:

1,2,4-Triazole

AKOS AU36-M362 ASINEX-REAG BAS 10142521 5-keto-1,2-dihydro-1,2,4-triazole-3-carboxylic acid 5-oxo-1,2-dihydro-1,2,4-triazole-3-carboxylic acid 1H-1,2,4-Triazole-3-carboxylic acid, 2,5-dihydro-5-oxo- 5-Oxo-4,5-dihydro-1H-[1,2,4]triazole-3-carboxylic acid 4538-16-3