ChemicalBook > CAS DataBase List > 1-(5-Methyl-2-thienyl)ethan-1-one

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

Product Name
1-(5-Methyl-2-thienyl)ethan-1-one
CAS No.
13679-74-8
Chemical Name
1-(5-Methyl-2-thienyl)ethan-1-one
Synonyms
methylthienylcetone;-Methyl-5-acetylthiophene;2-Acetyl-5-metylthiophene;5-Methyl-2-acetylthiophene;2-ACETYL-5-METHYLTHIOPHENE;Thiophene, 2-acetyl-5-methyl;1-(5-Methyl-2-thienyl)ethanone;1-(5-methyl-2-thienyl)-ethanon;2-Acetyl-5-methylthiophene,98%;2-Acetyl-5-methylthiophene >
CBNumber
CB8245960
Molecular Formula
C7H8OS
Formula Weight
140.2
MOL File
13679-74-8.mol
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1-(5-Methyl-2-thienyl)ethan-1-one Property

Melting point:
24-28 °C(lit.)
Boiling point:
65-67 °C1 mm Hg(lit.)
Density 
1.106 g/mL at 25 °C(lit.)
refractive index 
n20/D 1.561(lit.)
FEMA 
4643 | 2-ACETYL-5-METHYLTHIOPHENE
Flash point:
>230 °F
storage temp. 
under inert gas (nitrogen or Argon) at 2–8 °C
form 
Low Melting Crystalline Mass, Powder or Crystals
Specific Gravity
1.119
color 
White to pale yellow
Odor
at 1.00 % in propylene glycol. sweet spicy honey hawthorn almond acacia hyacinth caramellic graham cracker
Odor Type
spicy
Sensitive 
Light Sensitive
JECFA Number
2107
BRN 
110854
LogP
2.04
CAS DataBase Reference
13679-74-8(CAS DataBase Reference)
NIST Chemistry Reference
2-Acetyl-5-methylthiophene(13679-74-8)
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Safety

Hazard Codes 
Xn,Xi
Risk Statements 
20/21/22
Safety Statements 
36/37-22
RIDADR 
UN 3335
WGK Germany 
3
RTECS 
OB4972000
Hazard Note 
Irritant
HazardClass 
STENCH
HS Code 
29349990
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Warning
Hazard statements

H302Harmful if swallowed

Precautionary statements

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P270Do not eat, drink or smoke when using this product.

P330Rinse mouth.

P501Dispose of contents/container to..…

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
S552038
Product name
METHYL 5-METHYL-2-THIENYL KETONE
Purity
AldrichCPR
Packaging
250mg
Price
$179
Updated
2024/03/01
Sigma-Aldrich
Product number
533610
Product name
2-Acetyl-5-methylthiophene
Purity
98%
Packaging
25g
Price
$421
Updated
2024/03/01
TCI Chemical
Product number
A1181
Product name
2-Acetyl-5-methylthiophene
Purity
>96.0%(GC)
Packaging
5g
Price
$60
Updated
2024/03/01
Alfa Aesar
Product number
A11282
Product name
2-Acetyl-5-methylthiophene, 98%
Packaging
5g
Price
$51.65
Updated
2024/03/01
Alfa Aesar
Product number
A11282
Product name
2-Acetyl-5-methylthiophene, 98%
Packaging
25g
Price
$187.65
Updated
2024/03/01
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1-(5-Methyl-2-thienyl)ethan-1-one Chemical Properties,Usage,Production

Chemical Properties

white to light yellow crystal powder

Uses

2-Acetyl-5-methylthiophene may be used in the preparation of:

  • 2-ethyl-5-methylthiophene
  • (5-methylthiophen-2-yl)glyoxal
  • (2E)-1-(5-methylthiophen-2-yl)-3-(pyridin-3-yl)prop-2-en-1-one
  • ethyl 3-(5-methylthiophen-2-yl)-3-oxopropanoate

Definition

ChEBI: 2-acetyl-5-methylthiophene is a thiophene that is substituted by acetyl and methyl groups at positions 2 and 5, respectively. It has a role as a flavouring agent. It is an aromatic ketone, a member of thiophenes and a methyl ketone.

General Description

2-Acetyl-5-methylthiophene is a volatile organic compound formed during the reaction between L-cysteine and dihydroxyacetone in glycerine or triglyceride solvent system. It can be prepared by reacting 2-methylthiophene with acetic anhydride. 2-Acetyl-5-methylthiophene undergoes palladium-catalyzed cross-coupling reaction with aryl bromides to form C-4 arylated product. It reacts with 1,2-bis(5-formyl-2-methylthiophen-3-yl)cyclopentene via Aldol condensation to form a chalcone with photochromic property. The standard molar enthalpies of combustion, formation and vaporization of 2-acetyl-5-methylthiophene are 4341.9 ± 1.8kJ/mol, 158.0 ± 2.1kJ/mol and 62.0 ± 2.6kJ/mol, respectively.

Safety Profile

A poison by intraperitoneal route. A flammable liquid. When heated to decomposition it emits toxic vapors of SOx.

1-(5-Methyl-2-thienyl)ethan-1-one Preparation Products And Raw materials

Raw materials

Preparation Products

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

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View Lastest Price from 1-(5-Methyl-2-thienyl)ethan-1-one manufacturers

JINING XINHE CHEMICAL CO., LTD
Product
1-(5-Methyl-2-thienyl)ethan-1-one 13679-74-8
Price
US $0.00-0.00/kg
Min. Order
1kg
Purity
98%
Supply Ability
10ton
Release date
2024-07-20
Career Henan Chemical Co
Product
1-(5-Methyl-2-thienyl)ethan-1-one 13679-74-8
Price
US $1.00/KG
Min. Order
1G
Purity
98%
Supply Ability
100kg
Release date
2018-08-12

13679-74-8, 1-(5-Methyl-2-thienyl)ethan-1-oneRelated Search:

1-(5-Methyl-2-thienyl)ethan-1-one 2-Methyl-5-propionylthiophene 2-ACETYL-3-AMINO-5-PHENYLTHIOPHENE 2-ACETYL-5-CYANOTHIOPHENE 5-Acetylthiophene-2-carboxylic acid 1-(3-methyl-2-thienyl)ethan-1-on 1-(4-methyl-2-thienyl)ethan-1-one 2-Acetylthiophene 1-[3-AMINO-5-(4-CHLOROPHENYL)-2-THIENYL]ETHAN-1-ONE 2-ACETYL-3-AMINO-5-T-BUTYLTHIOPHENE 1-{5-[3-(DIMETHYLAMINO)PROP-1-YNYL]-2-THIENYL}ETHAN-1-ONE 1-(5-ETHYL-THIOPHEN-2-YL)-ETHANONE 3-(2-ACETYL-5-TERT-BUTYL-THIOPHEN-3-YLCARBAMOYL)-ACRYLIC ACID N-(2-ACETYL-5-TERT-BUTYL-THIOPHEN-3-YL)-SUCCINAMIC ACID 1-(3,5-DIMETHYL-2-THIENYL)ETHAN-1-ONE 2-[5-(2-CHLOROACETYL)-2-THIENYL]ACETIC ACID N1-(2-ACETYL-5-PHENYLTHIEN-3-YL)-2-CHLOROACETAMIDE N1-[2-ACETYL-5-(TERT-BUTYL)-3-THIENYL]-2,3,3-TRICHLOROACRYLAMIDE

  • 1-(5-methyl-2-thiophenyl)ethanone
  • 1-(5-methyl-2-thienyl)ethan-1-one
  • 2-Acetyl-5-Methylthiophene, 98% 25GR
  • 1-(5-methyl-2-thienyl)-ethanon
  • 1-(5-Methyl-2-thienyl)ethanone
  • 1-(5-Methyl-thiophen-2-yl)-ethanone
  • 5-Methyl-2-acetylthiophene
  • Ethanone, 1-(5-methyl-2-thienyl)-
  • Ketone, methyl 5-methyl-2-thienyl
  • ketone,methyl5-methyl-2-thienyl
  • Methyl 5-methyl-2-thienyl ketone
  • -Methyl-5-acetylthiophene
  • methylthienylcetone
  • Thiophene, 2-acetyl-5-methyl
  • 2-ACETYL-5-METHYLTHIOPHENE
  • 2-Acetyl-5-methylthiophene,98%
  • 2-Acetyl-5-methylthiophene &gt
  • 1-(5-Methyl-2-thienyl)ethan-1-one ISO 9001：2015 REACH
  • 2-Acetyl-5-metylthiophene
  • 13679-74-8
  • Thiophenes
  • Heterocyclic Building Blocks
  • KETONE
  • Building Blocks
  • Building Blocks
  • Heterocyclic Building Blocks
  • Thiophenes
  • Thiophene&Benzothiophene
  • Thiophens