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Basic Information
CAS No.: 13679-74-8
Name: 1-(5-Methyl-2-thienyl)ethan-1-one
Article Data: 25
Molecular Structure:
Molecular Structure of 13679-74-8 (1-(5-Methyl-2-thienyl)ethan-1-one)
Formula: C7H8OS
Molecular Weight: 140.206
Synonyms: Ketone,methyl 5-methyl-2-thienyl (6CI,7CI,8CI);1-(5-Methyl-2-thienyl)ethanone;2-Methyl-5-acetylthiophene;5-Methyl-2-thienylmethyl ketone;Methyl 5-methyl-2-thienyl ketone;
EINECS: 237-181-2
Density: 1.106 g/cm3
Melting Point: 24-28 °C(lit.)
Boiling Point: 234.9 °C at 760 mmHg
Flash Point: 95.8 °C
Appearance: white to light yellow crystal powder
Hazard Symbols: HarmfulXn, IrritantXi
Risk Codes: 20/21/22
Safety: 36/37-22
PSA: 45.31000
LogP: 2.25910
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Chemistry

Product Name: 1-(5-Methyl-2-thienyl)ethan-1-one
The MF of 1-(5-Methyl-2-thienyl)ethan-1-one(13679-74-8) is C7H8OS.

                                 
The MW of 1-(5-Methyl-2-thienyl)ethan-1-one(13679-74-8) is 140.2.
Synonyms: 1-(5-methyl-2-thienyl)ethan-1-one;Ethanone, 1-(5-methyl-2-thienyl)-;Ketone, methyl 5-methyl-2-thienyl;ketone,methyl5-methyl-2-thienyl;1-(5-methyl-2-thienyl)-ethanon;1-(5-Methyl-2-thienyl)ethanone;1-(5-Methyl-thiophen-2-yl)-ethanone;5-Methyl-2-acetylthiophene
Product Categories: Thiophene&Benzothiophene;Thiophens;Building Blocks;Heterocyclic Building Blocks;Thiophenes
Mol File: 13679-74-8.mol
EINECS: 237-181-2 
Surface Tension: 37.3 dyne/cm 
Density: 1.106 g/ml 
Flash Point: 95.8 °C 
Enthalpy of Vaporization: 47.16 kJ/mol 
Boiling Point: 234.9 °C at 760 mmHg 
Vapour Pressure: 0.0517 mmHg at 25°C
BRN: 110854
CAS DataBase Reference: 13679-74-8(CAS DataBase Reference)
NIST Chemistry Reference: 13679-74-8(NIST)

Toxicity Data With Reference

1.   

ipr-mus LD50:230 mg/kg

   APFRAD    Annales Pharmaceutiques Francaises. 5 (1947),16.

Safety Profile

A poison by intraperitoneal route. A flammable liquid. When heated to decomposition it emits toxic vapors of SOx.
Safety information of 1-(5-Methyl-2-thienyl)ethan-1-one(13679-74-8):
Hazard Codes: Xn,Xi
Risk Statements: 20/21/22
R20/21/22:Harmful by inhalation, in contact with skin and if swallowed ;
Safety Statements: 36/37-22
S36/37:Wear suitable protective clothing and gloves ;
S22:Do not breathe dust ;
WGK Germany: 3
RTECS: OB4972000
Hazard Note: Irritant

Standards and Recommendations

DOT Classification:  3; Label: Flammable Liquid

Specification

The 1-(5-Methyl-2-thienyl)ethan-1-one(13679-74-8) is stable under normal temperatures and pressures but incompatible with strong oxidizing agents.Hazardous decomposition products are carbon monoxide, oxides of sulfur, carbon dioxide.