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3-Methylisothiazole-5-carboxylic acid

3-Methylisothiazole-5-carboxylic acid structure

CAS No.: 66975-83-5

Chemical Name:: 3-Methylisothiazole-5-carboxylic acid

Synonyms: 3-methyl-1,2-thiazole-5-carboxylic acid;5-Isothiazolecarboxylicacid, 3-methyl-;3-Methylisothiazole-5-carboxylic acid

CBNumber:: CB81508491

Molecular Formula:: C5H5NO2S

Molecular Weight:: 143.16

MDL Number:: MFCD11110341

MOL File:: 66975-83-5.mol

Last updated:2026-05-28 04:21:16

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3-Methylisothiazole-5-carboxylic acid Properties

Melting point	206 °C (decomp)
Boiling point	187.8±33.0 °C(Predicted)
Density	1.418±0.06 g/cm3(Predicted)
pka	1.30±0.10(Predicted)
form	solid
color	Beige

SAFETY

Risk and Safety Statements

Symbol(GHS)	GHS07
Signal word	Warning
Hazard statements	H302-H312-H315-H319-H332-H335
Precautionary statements	P261-P264-P270-P271-P280-P301+P312-P302+P352-P304+P340-P305+P351+P338-P330-P332+P313-P337+P313-P362-P403+P233-P405-P501
HazardClass	IRRITANT
HS Code	2934999090

3-Methylisothiazole-5-carboxylic acid price More Price(26)

Manufacturer	Product number	Product description	CAS number	Packaging	Price	Updated	Buy
Apolloscientific	OR346142	3-Methyl-isothiazole-5-carboxylic acid ≥95%	66975-83-5	25mg	$55	2026-06-04	Buy
Apolloscientific	OR346142	3-Methyl-isothiazole-5-carboxylic acid ≥95%	66975-83-5	500mg	$617	2026-06-04	Buy
Apolloscientific	OR346142	3-Methyl-isothiazole-5-carboxylic acid ≥95%	66975-83-5	1g	$985	2026-06-04	Buy
Activate Scientific	AS68811	3-Methyl-isothiazole-5-carboxylic acid 95%	66975-83-5	1g	$522	2026-06-04	Buy
aablocks	AA00FCKE	3-methyl-1,2-thiazole-5-carboxylic acid 95%	66975-83-5	100mg	$248	2026-05-28	Buy

Product number	Packaging	Price	Buy
OR346142	25mg	$55	Buy
OR346142	500mg	$617	Buy
OR346142	1g	$985	Buy
AS68811	1g	$522	Buy
AA00FCKE	100mg	$248	Buy

3-Methylisothiazole-5-carboxylic acid Chemical Properties, Uses, Production

3-Methylisothiazole-5-carboxylic acid Preparation Products And Raw materials

Raw materials

Preparation Products

3-Methylisothiazole

3-Methylisothiazole-5-carboxylic acid Suppliers

Global Suppliers ( 14)

Supplier	Tel	Email	Country	ProdList	Advantage
Jiangsu Aikon Biopharmaceutical R&D co.,Ltd.	025-66028182 17714375163	yftan@aikonchem.com	China	16674	50
Amadis Chemical Company Limited	571-89925085	sales@amadischem.com	China	131885	58
Yujinpharma(Tianjin) Technology Co.,Ltd.	13370351217 kungfu1217@1	kungfu1217@163.com	China	7991	58
Guangzhou Yuheng Pharmaceutical Technology Co., Ltd	+8613580539051	joe@yuhengpharm.com	CHINA	21135	58
Taizhou Nanfeng Pharmaceutical Research Institute	nanfengpharma@126.co 18616377689	nanfengpharma@126.com	China	20008	58
Block Chemical Technology (Shanghai) Co., LTD	021-20432219 13918097649	li_jinfei@acblock-lab.com	China	9964	58
Taizhou Chuanxu Pharmaceutical Technology Co., Ltd.	chuanxupharma@126.co	chuanxupharma@126.com	China	9982	58
Nantong Xinqisheng Biotechnology Co., Ltd.	13635551869 13690496888	liujianhong90@126.com	China	1000	58

Supplier	Advantage
Jiangsu Aikon Biopharmaceutical R&D co.,Ltd.	50
Amadis Chemical Company Limited	58
Yujinpharma(Tianjin) Technology Co.,Ltd.	58
Guangzhou Yuheng Pharmaceutical Technology Co., Ltd	58
Taizhou Nanfeng Pharmaceutical Research Institute	58
Block Chemical Technology (Shanghai) Co., LTD	58
Taizhou Chuanxu Pharmaceutical Technology Co., Ltd.	58
Nantong Xinqisheng Biotechnology Co., Ltd.	58

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3-Methylisothiazole-5-carboxylic acid 5-Isothiazolecarboxylicacid, 3-methyl- 3-methyl-1,2-thiazole-5-carboxylic acid 66975-83-5