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2-Methyl Ethynyl Estradiol

2-Methyl Ethynyl Estradiol structure

CAS No.: 3240-39-9

Chemical Name:: 2-Methyl Ethynyl Estradiol

Synonyms: 2-Methyl-ethinylestradiol;Ethinylestradiol EP Imp M;2-Methyl Ethynyl Estradiol;Ethinylestradiol EP Impurity M;Ethinylestradiol EP Impurity M/2-Methyl Ethynyl Estradiol;ETHINYLESTRADIOL EP IMPURITY M (2-METHYL-ETHINYLESTRADIOL);2-Methyl-19-nor-17α-pregna-1,3,5(10)-trien-20-yne-3,17-diol;(17α)-2-Methyl-19-norpregna-1,3,5(10)-trien-20-yne-3,17-diol;Ethinylestradiol Impurity 13（Ethinylestradiol EP Impurity M）;19-Norpregna-1,3,5(10)-trien-20-yne-3,17-diol, 2-methyl-, (17α)-

CBNumber:: CB52558041

Molecular Formula:: C21H26O2

Molecular Weight:: 310.43

MDL Number:: MFCD20133780

MOL File:: 3240-39-9.mol

Last updated:2026-05-20 15:44:56

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2-Methyl Ethynyl Estradiol Properties

Melting point	172-175°C
Boiling point	463.3±45.0 °C(Predicted)
Density	1.19±0.1 g/cm3(Predicted)
storage temp.	Refrigerator
solubility	Chloroform (Slightly), DMSO (Slightly), Methanol (Slightly)
pka	10.61±0.60(Predicted)
form	Solid
color	White to Pale Yellow
FDA UNII	YD0T6YEK7D

2-Methyl Ethynyl Estradiol price More Price(6)

Manufacturer	Product number	Product description	CAS number	Packaging	Price	Updated	Buy
TRC	TRC-M304975-5MG	2-Methyl Ethynyl Estradiol	3240-39-9	5mg	$205	2026-06-03	Buy
TRC	TRC-M304975-10MG	2-Methyl Ethynyl Estradiol	3240-39-9	10mg	$384	2026-06-03	Buy
aablocks	AA00C9P8	2-Methyl Ethynyl Estradiol	3240-39-9	5mg	$284	2026-05-28	Buy
aablocks	AA00C9P8	2-Methyl Ethynyl Estradiol	3240-39-9	10mg	$428	2026-05-28	Buy
TRC	M304975	2-MethylEthynylEstradiol	3240-39-9	2mg	$85	2021-12-16	Buy

Product number	Packaging	Price	Buy
TRC-M304975-5MG	5mg	$205	Buy
TRC-M304975-10MG	10mg	$384	Buy
AA00C9P8	5mg	$284	Buy
AA00C9P8	10mg	$428	Buy
M304975	2mg	$85	Buy

2-Methyl Ethynyl Estradiol Chemical Properties, Uses, Production

Uses

2-Methylethynylestradiol is a 17α-ethynyl steroid. 2-Methylethynylestradiol is an impurity of Ethynylestradiol (E685100).

Uses

2-Methylethynylestradiol (Ethinylestradiol EP Impurity M) is a 17α-ethynyl steroid. 2-Methylethynylestradiol is an impurity of Ethynylestradiol (E685100).

2-Methyl Ethynyl Estradiol Preparation Products And Raw materials

Raw materials

Preparation Products

2-Methyl Ethynyl Estradiol Suppliers

Global Suppliers ( 34)

Supplier	Tel	Email	Country	ProdList	Advantage
J & K SCIENTIFIC LTD.	18210857532 18210857532	jkinfo@jkchemical.com	China	96815	76
Chemsky (shanghai) International Co.,Ltd	021-50135380	shchemsky@sina.com	China	15350	60
Cato Research Chemicals Inc.	020-81960175	min.he@cato-chem.com	China	1949	55
Quality Control Solutions Ltd.	0755-66853366 13670046396	orders@qcsrm.com	China	18188	56
Nanjing XiZe Biotechnology CO., Ltd.	025-66023220 15250997978	1511893459@qq.com	China	4777	55
BOC Sciences	16314854226	info@bocsci.com	United States	9909	65
Shanghai CR Corporation Limited	13917420128 13062833949	fred.wen@crcorporation.cn	China	9775	58
Shenzhen Polymeri Biochemical Technology Co., Ltd.	+86-400-002-6226	sales@rrkchem.com	China	57336	58
BOC Sciences	16314854226; +8616314854226	inquiry@bocsci.com	United States	19852	58
CR Corporation Limited		fred.wen@crcorporation.cn	China	8642	58

Supplier	Advantage
J & K SCIENTIFIC LTD.	76
Chemsky (shanghai) International Co.,Ltd	60
Cato Research Chemicals Inc.	55
Quality Control Solutions Ltd.	56
Nanjing XiZe Biotechnology CO., Ltd.	55
BOC Sciences	65
Shanghai CR Corporation Limited	58
Shenzhen Polymeri Biochemical Technology Co., Ltd.	58
BOC Sciences	58
CR Corporation Limited	58

3240-39-9 (2-Methyl Ethynyl Estradiol) Related Search:

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1,3,5(10)-ESTRATRIEN-17-ALPHA-ETHYNYL-3,17-BETA-DIOL-6-ONE (8S,9S,13S,14S,17R)-17-ethynyl-4,13-dimethyl-7,8,9,11,12,14,15,16-octahydro-6H-cyclopenta[a]phenanthrene-1,17-diol 4-Methyl Ethynyl Estradiol Ethinylestradiol 9,11-Dehydro Ethynyl Estradiol

Estrone

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2-Methyl Ethynyl Estradiol (17α)-2-Methyl-19-norpregna-1,3,5(10)-trien-20-yne-3,17-diol 2-Methyl-19-nor-17α-pregna-1,3,5(10)-trien-20-yne-3,17-diol Ethinylestradiol EP Impurity M ETHINYLESTRADIOL EP IMPURITY M (2-METHYL-ETHINYLESTRADIOL) Ethinylestradiol EP Imp M (8R,9S,13S,14S,17R)-17-ethynyl-2,13-dimethyl-7,8,9,11,12,14,15,16-octahydro-6H-cyclopenta[a]phenanthrene-3,17-diol Ethinylestradiol Impurity 13（Ethinylestradiol EP Impurity M） 19-Norpregna-1,3,5(10)-trien-20-yne-3,17-diol, 2-methyl-, (17α)- (8R,9S,13S,14S,17R)-17-ethynyl-2,13-dimethyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diol 2-Methyl-ethinylestradiol (8R,9S,13S,14S,17R)-17-Ethynyl-2,13-dimethyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diol (Ethinylestradiol Impurity) Ethinylestradiol EP Impurity M/2-Methyl Ethynyl Estradiol 3240-39-9 Impurities Intermediates & Fine Chemicals Pharmaceuticals Steroids