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2-methylthieno[2,3-d]pyrimidin-4(3H)-one

2-methylthieno[2,3-d]pyrimidin-4(3H)-one structure

CAS No.: 21582-51-4

Chemical Name:: 2-methylthieno[2,3-d]pyrimidin-4(3H)-one

Synonyms: 2-methylthieno[3,2-d]pyrimidin-4-ol;2-methylthieno[2,3-d]pyrimidin-4-ol;2-METHYL THIENO[2,3-d]PYRIMIDINE-4-OL;2-methylthieno[2,3-d]pyrimidin-4(3H)-one;2-Methyl-3H-thieno[2,3-d]pyrimidin-4-one;Thieno[2,3-d]pyrimidin-4(1H)-one, 2-methyl-;2-Methyl-3,4-dihydro-4-oxothieno[2,3-d]pyrimidine;2-Methyl-3,4-dihydro-4-oxothieno[2,3-d]pyrimidine;2-methylthieno[2,3-d]pyrimidin-4(3H)-one(SALTDATA: FREE);2-methylthieno[2,3-d]pyrimidin-4(3H)-one ISO 9001：2015 REACH

CBNumber:: CB51079569

Molecular Formula:: C7H6N2OS

Molecular Weight:: 166.2

MDL Number:: MFCD00706457

MOL File:: 21582-51-4.mol

MSDS File:: SDS

Last updated:2026-07-28 08:09:06

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2-methylthieno[2,3-d]pyrimidin-4(3H)-one Properties

Melting point	204-206℃
Density	1.53
storage temp.	Storage temp. 2-8°C
pka	10.871±0.20(predicted)
form	solid
Appearance	Off-white to gray Solid
InChI	InChI=1S/C7H6N2OS/c1-4-8-6(10)5-2-3-11-7(5)9-4/h2-3H,1H3,(H,8,9,10)
InChIKey	YAGLWUMMXGHFDI-UHFFFAOYSA-N
SMILES	C1(C)=NC(=O)C2C=CSC=2N1
UNSPSC Code	12352200
NACRES	NA.21

SAFETY

Risk and Safety Statements

Symbol(GHS)	GHS07
Signal word	Warning
Hazard statements	H302
Precautionary statements	P280-P305+P351+P338
Hazard Codes	Xn
Risk Statements	22
WGK Germany	WGK 3
HS Code	2934999090
Storage Class	11 - Combustible Solids
Hazard Classifications	Acute Tox. 4 Oral

2-methylthieno[2,3-d]pyrimidin-4(3H)-one price More Price(27)

Manufacturer	Product number	Product description	CAS number	Packaging	Price	Updated	Buy
Sigma-Aldrich	JRD0266	2-Methyl-3,4-dihydro-4-oxothieno[2,3-d]pyrimidine Aldrich	21582-51-4	1g	$454	2026-04-30	Buy
Biosynth	WAA58251	2-Methylthieno[2,3-d]pyrimidin-4-ol	21582-51-4	0.5g	$354	2026-06-05	Buy
Biosynth	WAA58251	2-Methylthieno[2,3-d]pyrimidin-4-ol	21582-51-4	5g	$1416	2026-06-05	Buy
Heterocyclics	JR-12522	2-Methyl-3,4-dihydro-4-oxothieno[2,3-d]pyrimidine 97%	21582-51-4	1g	$130	2026-06-05	Buy
Heterocyclics	JR-12522	2-Methyl-3,4-dihydro-4-oxothieno[2,3-d]pyrimidine 97%	21582-51-4	5g	$405	2026-06-05	Buy

Product number	Packaging	Price	Buy
JRD0266	1g	$454	Buy
WAA58251	0.5g	$354	Buy
WAA58251	5g	$1416	Buy
JR-12522	1g	$130	Buy
JR-12522	5g	$405	Buy

2-methylthieno[2,3-d]pyrimidin-4(3H)-one Preparation Products And Raw materials

Raw materials

Preparation Products

2-methylthieno[2,3-d]pyrimidin-4(3H)-one Suppliers

Global Suppliers ( 51)

Supplier	Tel	Email	Country	ProdList	Advantage
Yancheng Orgunion Pharmaceutical Sci & Tech Co., Ltd.	0515-89701588 13770166955	orgunion@orgunion.com	China	620	55
J & K SCIENTIFIC LTD.	18210857532 18210857532	jkinfo@jkchemical.com	China	96815	76
Meryer (Shanghai) Chemical Technology Co., Ltd.	4006356688 18621169109	market03@meryer.com	China	40202	62
Shanghai Yuanding Chem. Sci. & Tech. Co., Ltd.	21-57721279 18121011378	sales@shydchem.com.cn	China	998	56
SuZhou ShiYa Biopharmaceuticals, Inc.	86(512)5235 8471 17715136450	sales@shiyabiopharm.com	China	4167	58
Zhengzhou Alfachem Co., Ltd.	0371-53765687 18937137882	3969243885@qq.com	China	7734	55
Shanghai YuanYe Biotechnology Co., Ltd.	15026964105	2881489226@qq.com	China	89667	60
Shanghai Chaolan Chemical Technology Center	QQ：65489617 13301690235	Sales@ATKchemical.com	China	9729	58
Amadis Chemical Company Limited	571-89925085	sales@amadischem.com	China	131885	58
Aikon International Limited	025-58859352 15955137747	sales01@aikonchem.com	China	16021	58

Supplier	Advantage
Yancheng Orgunion Pharmaceutical Sci & Tech Co., Ltd.	55
J & K SCIENTIFIC LTD.	76
Meryer (Shanghai) Chemical Technology Co., Ltd.	62
Shanghai Yuanding Chem. Sci. & Tech. Co., Ltd.	56
SuZhou ShiYa Biopharmaceuticals, Inc.	58
Zhengzhou Alfachem Co., Ltd.	55
Shanghai YuanYe Biotechnology Co., Ltd.	60
Shanghai Chaolan Chemical Technology Center	58
Amadis Chemical Company Limited	58
Aikon International Limited	58

View Latest Price from 2-methylthieno[2,3-d]pyrimidin-4(3H)-one manufacturers

Image	Update time	Product	Price	Min. Order	Purity	Supply Ability	Manufacturer
	2026-08-20	2-methylthieno[2,3-d]pyrimidin-4(3H)-one 21582-51-4	$1.10	1g	99.00%	100 Tons Min	Dideu Industries Group Limited

2-methylthieno[2,3-d]pyrimidin-4(3H)-one
21582-51-4
$1.10
99.00%
Dideu Industries Group Limited

2-methylthieno[2,3-d]pyrimidin-4(3H)-one Spectrum

2-methylthieno[2,3-d]pyrimidin-4(3H)-one(21582-51-4)¹HNMR

21582-51-4 (2-methylthieno[2,3-d]pyrimidin-4(3H)-one) Related Search:

3-(4-Oxo-3,5,6,7-tetrahydro-4H-cyclopenta[4,5]thieno[2,3-d]pyrimidin-2-yl)propanoic acid 2,5-Dimethyl-4-oxo-3,4-dihydro-thieno[2,3-d]pyrimidine-6-carboxylic acid ethyl ester 3-Amino-2,6-dimethyl-3H-thieno[2,3-d]pyrimidin-4-one 3-Amino-6-ethyl-2-methylthieno[2,3-d]pyrimidin-4(3H)-one 3-(4-Oxo-3,4,5,6,7,8-hexahydro-benzo[4,5]thieno[2,3-d]pyrimidin-2-yl)-propionic acid

2-methyl-3,5,6,7-tetrahydro-4H-cyclopenta[4,5]thieno[2,3-d]pyrimidin-4-one AKOS 94123 SPECS AH-262/31831062 AKOS 92543

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2-methylthieno[2,3-d]pyrimidin-4(3H)-one 2-methylthieno[2,3-d]pyrimidin-4-ol 2-methylthieno[3,2-d]pyrimidin-4-ol 2-methylthieno[2,3-d]pyrimidin-4(3H)-one(SALTDATA: FREE) 2-Methyl-3H-thieno[2,3-d]pyrimidin-4-one 2-Methyl-3,4-dihydro-4-oxothieno[2,3-d]pyrimidine Thieno[2,3-d]pyrimidin-4(1H)-one, 2-methyl- 2-methylthieno[2,3-d]pyrimidin-4(3H)-one ISO 9001：2015 REACH 2-METHYL THIENO[2,3-d]PYRIMIDINE-4-OL 2-Methyl-3,4-dihydro-4-oxothieno[2,3-d]pyrimidine 21582-51-4