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

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

1-(5-Methyl-2-thienyl)ethan-1-one Structure
1-(5-Methyl-2-thienyl)ethan-1-one
  • CAS No.13679-74-8
  • Chemical Name:1-(5-Methyl-2-thienyl)ethan-1-one
  • CBNumber:CB8245960
  • Molecular Formula:C7H8OS
  • Formula Weight:140.2
  • MOL File:13679-74-8.mol
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.)
  • FEMA 4643 | 2-ACETYL-5-METHYLTHIOPHENE
  • refractive index n20/D 1.561(lit.)
  • 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)
  • Substances Added to Food (formerly EAFUS) 2-ACETYL-5-METHYLTHIOPHENE
  • EWG's Food Scores 1
  • FDA UNII 2HS3I278W9
  • NIST Chemistry Reference 2-Acetyl-5-methylthiophene(13679-74-8)
  • UNSPSC Code 12352100
  • NACRES NA.22
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
  • NFPA 704:
    0
    2 0
Hazard and Precautionary Statements (GHS)
  • Symbol(GHS)
  • Signal wordWarning
  • Hazard statements H302
  • Precautionary statements P301+P312a-P330-P501a-P264-P270-P301+P312+P330-P501
1-(5-Methyl-2-thienyl)ethan-1-one Price More Price(2)
  • Brand: Sigma-Aldrich(India)
  • Product number: 533610
  • Product name : 2-Acetyl-5-methylthiophene
  • Purity: 98%
  • Packaging: 25G
  • Price: ₹28707.9
  • Updated: 2022/06/14
  • Buy: Buy
  • Brand: TCI Chemicals (India)
  • Product number: A1181
  • Product name : 2-Acetyl-5-methylthiophene
  • Purity: min. 96.0 %
  • Packaging: 5G
  • Price: ₹4000
  • Updated: 2022/05/26
  • Buy: Buy

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