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HomeProduct name list3-methylcyclopent-2-en-1-one

3-methylcyclopent-2-en-1-one

Synonym(s):3-Methyl-2-cyclopentenone

  • CAS NO.:2758-18-1
  • Empirical Formula: C6H8O
  • Molecular Weight: 96.13
  • MDL number: MFCD00001403
  • EINECS: 220-421-5
  • SAFETY DATA SHEET (SDS)
  • Update Date: 2024-11-17 16:00:36
3-methylcyclopent-2-en-1-one Structural

What is 3-methylcyclopent-2-en-1-one?

Description

May be prepared by dehydrohalogenation of 2-chloro-l-methylcyclopentan-3-one.

Chemical properties

clear light yellow to yellow-brownish liquid

Chemical properties

1-Methyl-1-cyclopenten-3-one has a sweet-floral, warm-spicy and diffusive yet quite tenacious odor.

Occurrence

Reported found in roasted onion, cooked pork, black tea, soybean and dried bonito

The Uses of 3-methylcyclopent-2-en-1-one

It is an important raw material and intermediate used in Organic Synthesis, Pharmaceuticals, Agrochemicals.

The Uses of 3-methylcyclopent-2-en-1-one

3-Methyl-2-cyclopentenone was used in the synthesis of 2-hydroxy-3-methyl-2-cyclopentenone.

Preparation

By dehydrohalogenation of 2-chloro-1-methyl-cyclopentan-3-one.

Definition

ChEBI: 3-Methyl-2-cyclopenten-1-one is a cyclic ketone.

Synthesis Reference(s)

Journal of the American Chemical Society, 101, p. 494, 1979 DOI: 10.1021/ja00496a044
The Journal of Organic Chemistry, 55, p. 371, 1990

General Description

3-Methyl-2-cyclopenten-1-one is a component of smoke flavoring.

Properties of 3-methylcyclopent-2-en-1-one

Melting point: 3-5 °C (lit.)
Boiling point: 74 °C/15 mmHg (lit.)
Density  0.980 g/mL at 20 °C 0.971 g/mL at 25 °C (lit.)
refractive index  n20/D 1.488(lit.)
FEMA  3435 | 1-METHYL-1-CYCLOPENTEN-3-ONE
Flash point: 150 °F
storage temp.  2-8°C
solubility  Soluble in DMSO
form  Liquid
color  Clear light yellow to yellow-brown
Odor at 1.00 % in dipropylene glycol. sweet fruity fatty
PH 4.9 (10g/l, H2O, 20℃)
Water Solubility  miscible
JECFA Number 1105
BRN  1280476
CAS DataBase Reference 2758-18-1(CAS DataBase Reference)
NIST Chemistry Reference 2-Cyclopenten-1-one, 3-methyl-(2758-18-1)
EPA Substance Registry System 3-Methyl-2-cyclopenten-1-one (2758-18-1)

Safety information for 3-methylcyclopent-2-en-1-one

Signal word Warning
Pictogram(s)
ghs
Exclamation Mark
Irritant
GHS07
GHS Hazard Statements H227:Flammable liquids
Precautionary Statement Codes P403+P235:Store in a well-ventilated place. Keep cool.

Computed Descriptors for 3-methylcyclopent-2-en-1-one

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