1-(5-Methyl-2-thienyl)ethanone

Modify Date: 2025-08-25 19:17:49

1-(5-Methyl-2-thienyl)ethanone structure	Common Name	1-(5-Methyl-2-thienyl)ethanone
	CAS Number	13679-74-8	Molecular Weight	140.203
	Density	1.1±0.1 g/cm3	Boiling Point	234.9±20.0 °C at 760 mmHg
	Molecular Formula	C₇H₈OS	Melting Point	24-28 °C(lit.)
	MSDS	USA	Flash Point	95.8±21.8 °C

Use of 1-(5-Methyl-2-thienyl)ethanone

2-Acetyl-5-methylthiophene is a constituent of coffee aroma.

Name	2-Acetyl-5-methylthiophene
Synonym	More Synonyms

Density	1.1±0.1 g/cm3
Boiling Point	234.9±20.0 °C at 760 mmHg
Melting Point	24-28 °C(lit.)
Molecular Formula	C₇H₈OS
Molecular Weight	140.203
Flash Point	95.8±21.8 °C
Exact Mass	140.029587
PSA	45.31000
LogP	1.71
Vapour Pressure	0.1±0.5 mmHg at 25°C
Index of Refraction	1.536

1-(5-Methyl-2-thienyl)ethanone MSDS(Chinese)

CHEMICAL IDENTIFICATION

RTECS NUMBER :: OB4972000

CHEMICAL NAME :: Ketone, methyl 5-methyl-2-thienyl

CAS REGISTRY NUMBER :: 13679-74-8

BEILSTEIN REFERENCE NO. :: 0110854

LAST UPDATED :: 199612

DATA ITEMS CITED :: 1

MOLECULAR FORMULA :: C7-H8-O-S

MOLECULAR WEIGHT :: 140.21

WISWESSER LINE NOTATION :: T5SJ B1 EV1

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Intraperitoneal

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 230 mg/kg

TOXIC EFFECTS :: Behavioral - convulsions or effect on seizure threshold Lungs, Thorax, or Respiration - other changes

REFERENCE :: APFRAD Annales Pharmaceutiques Francaises. (SPPIF, B.P.22, F-41353 Vineuil, France) V.1- 1943- Volume(issue)/page/year: 5,16,1947

Personal Protective Equipment	Eyeshields;Gloves;type N95 (US);type P1 (EN143) respirator filter
Hazard Codes	Xn: Harmful;Xi: Irritant;
Risk Phrases	R20/21/22
Safety Phrases	S36/37-S22
RIDADR	UN 3335 9
WGK Germany	3
RTECS	OB4972000
HS Code	2934999090

methylthiol structure

methylthiol

CAS#:554-14-3

Acetyl chloride structure

Acetyl chloride

CAS#:75-36-5

~97%

1-(5-Methyl-2-thienyl)ethanone Structure

1-(5-Methyl-2-t...

CAS#:13679-74-8

Literature: Altenhoener, Kai; Lamm, Jan-Hendrik; Mattay, Jochen European Journal of Organic Chemistry, 2010 , # 31 p. 6033 - 6037

methylthiol structure

methylthiol

CAS#:554-14-3

Ethanoic anhydride structure

Ethanoic anhydride

CAS#:108-24-7

~67%

1-(5-Methyl-2-thienyl)ethanone Structure

1-(5-Methyl-2-t...

CAS#:13679-74-8

Literature: SUMITOMO SEIKA CHEMICALS CO., LTD. Patent: EP1695972 A1, 2006 ; Location in patent: Page/Page column 7 ;

Precursor 3
CAS#:554-14-3 methylthiol CAS#:108-24-7 Ethanoic anhydride CAS#:75-36-5 Acetyl chloride
DownStream 9
CAS#:4282-31-9 Thiophene-2,5-d... CAS#:1918-79-2 5-Methly-2-thio... CAS#:40323-88-4 2-Ethyl-5-methy... CAS#:326-72-7 1,3-Butanedione...
CAS#:4066-41-5 5-Acetyl-2-thio... CAS#:31555-59-6 5-METHYL-THIOPH... CAS#:13792-96-6 2-[3,5-bis(5-me... CAS#:36901-17-4 1-(4-bromo-5-me...
CAS#:70624-30-5 2-(5-methylthio...

HS Code	2934999090
Summary	2934999090. other heterocyclic compounds. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

Acylation studies in the thiophene and furan series. IV. Strong inorganic oxyacids as catalysts. Hartough HD and Kosak AI.

J. Am. Chem. Soc. 69(12) , 3093-3096, (1947)

Palladium-catalysed direct 3-or 4-arylation of thiophene derivatives using aryl bromides. Dong JJ, et al.

Tetrahedron 50(23) , 2778-2781, (2009)

Efficient guaiazulene and chamazulene syntheses involving [6+4] cycloadditions. Mukherjee D, et al.

J. Am. Chem. Soc. 1010(1) , 251-252, (1979)

Thiophene, 2-acetyl-5-methyl-

1-(5-Methyl-2-thienyl)ethanone

1-(5-Methyl-2-thienyl)ethanone

2-Acetyl-5-methylthiophene

T5SJ BV1 E1

Ethanone, 1-(5-methyl-2-thienyl)-

1-(5-methylthien-2-yl)ethanone

Methyl 5-methyl-2-thienyl ketone

1-(5-Methyl-2-thienyl)ethan-1-one

1-(5-methylthiophen-2-yl)ethanone

MFCD00014529

EINECS 237-181-2

Ketone, methyl 5-methyl-2-thienyl

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Shanghai Nianxing Industrial Co., Ltd
China
Product Name: 1-(5-Methyl-2-thienyl)ethanone
Price: Check
Purity: 96.0%
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Shanghai Jizhi Biochemical Technology Co., Ltd
China
Product Name: 1-(5-Methyl-2-thienyl)ethanone
Price: ￥88.0/1g ￥148.0/5g
Purity: 95.0%
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DC Chemicals Limited
China
Product Name: 2-Acetyl-5-methylthiophene
Price: $Inquiry/100mg $Inquiry/250mg $Inquiry/500mg
Purity: 98.0%
Delivery: 3 Day
Contact: Tony Cao
Email: sales@dcchemicals.com

Dayang Chem (Hangzhou) Co., Ltd.
China
Product Name: 2-Acetyl-5-methylthiophene
Price: $Inquiry/100g $Inquiry/1kg $Inquiry/100kg $Inquiry/1000kg
Purity: 98.0%
Delivery: Inquiry
Contact: Ms Wang
Email: enquiry@dycnchem.com

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