3,4-dimethyl 2-hydroxy-2-cyclopenten-1-one

Synonym(s):Caramel pentadione

CAS NO.：13494-06-9
Empirical Formula: C7H10O2
Molecular Weight: 126.15
MDL number: MFCD00143063
EINECS: 236-810-8
SAFETY DATA SHEET (SDS)
Update Date: 2024-07-16 16:27:54

3,4-dimethyl 2-hydroxy-2-cyclopenten-1-one Structural

What is 3,4-dimethyl 2-hydroxy-2-cyclopenten-1-one?

Chemical properties

slightly yellow to light beige crystalline powder

Occurrence

Reported found as a constituent in coffee.

The Uses of 3,4-dimethyl 2-hydroxy-2-cyclopenten-1-one

3,4-Dimethyl-1,2-cyclopentanedione is a useful protective agent for food products.

Preparation

By alkylation of 3,5-dicarbetoxy-4-methyl-cyclopentane-1,2-dione followed by hydrolysis and decarboxylation of the resulting 3,5-dicarbetoxy-3,4-dimethyl-cyclopentane-1,2-di-one

Aroma threshold values

Detection: 17 to 20 ppb

Taste threshold values

Taste characteristics at 10 ppm: brown, sweet, sugary, maple and caramellic.

Properties of 3,4-dimethyl 2-hydroxy-2-cyclopenten-1-one

Melting point:	68-72 °C(lit.)
Boiling point:	194.28°C (rough estimate)
Density	1.0579 (rough estimate)
refractive index	1.4690 (estimate)
FEMA	3268 \| 3,4-DIMETHYL-1,2-CYCLOPENTADIONE
storage temp.	Inert atmosphere,2-8°C
solubility	Chloroform (Soluble), Methanol (Slightly)
form	Crystalline Powder
color	Slightly yellow to light beige
Odor	at 1.00 % in dipropylene glycol. sweet maple caramel sugar fenugreek licorice
Water Solubility	slightly soluble
JECFA Number	420
CAS DataBase Reference	13494-06-9(CAS DataBase Reference)
NIST Chemistry Reference	1,2-Cyclopentanedione, 3,4-dimethyl-(13494-06-9)
EPA Substance Registry System	1,2-Cyclopentanedione, 3,4-dimethyl- (13494-06-9)

Safety information for 3,4-dimethyl 2-hydroxy-2-cyclopenten-1-one

Signal word	Warning
Pictogram(s)	Exclamation Mark Irritant GHS07
GHS Hazard Statements	H302:Acute toxicity,oral H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation
Precautionary Statement Codes	P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.