4,5-Dimethyl-3-hydroxy-2,5-dihydrofuran-2-one

Bezeichnung:4,5-Dimethyl-3-hydroxy-2,5-dihydrofuran-2-one

CAS-Nr28664-35-9

Englisch Name:4,5-Dimethyl-3-hydroxy-2,5-dihydrofuran-2-one

CBNumberCB6466523

SummenformelC6H8O3

Molgewicht128.13

MOL-Datei28664-35-9.mol

4,5-Dimethyl-3-hydroxy-2,5-dihydrofuran-2-one physikalisch-chemischer Eigenschaften

Schmelzpunkt	26-29 °C(lit.)
Siedepunkt	184 °C(lit.)
Dichte	1.049 g/mL at 25 °C
Brechungsindex	n20/D 1.491(lit.)
FEMA	3634 \| 4,5-DIMETHYL-3-HYDROXY-2,5-DIHYDROFURAN-2-ONE
Flammpunkt	>230 °F
storage temp.	Sealed in dry,2-8°C
pka	9.28±0.40(Predicted)
Geruch (Odor)	at 0.01 % in propylene glycol. extremely sweet strong caramel maple burnt sugar coffee
Geruchsart	caramellic
JECFA Number	243
InChIKey	UNYNVICDCJHOPO-UHFFFAOYSA-N
LogP	-0.44
CAS Datenbank	28664-35-9(CAS DataBase Reference)
NIST chemische Informationen	2(5H)-furanone, 3-hydroxy-4,5-dimethyl-(28664-35-9)
EPA chemische Informationen	2(5H)-Furanone, 3-hydroxy-4,5-dimethyl- (28664-35-9)

Sicherheit

Kennzeichnung gefährlicher	Xn
R-Sätze:	20/22
S-Sätze:	36
WGK Germany	3
HS Code	29329990

Gefahreninformationscode (GHS)

4,5-Dimethyl-3-hydroxy-2,5-dihydrofuran-2-one Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R20/22:Gesundheitsschädlich beim Einatmen und Verschlucken.
S-Sätze Betriebsanweisung:
S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.
Chemische Eigenschaften
3-Hydroxy-4,5-dimethyl-2(5H)-furanone was found in, for example, fenugreek, coffee, sake, and florsherry. Its aroma characteristic changes from caramel-like at low concentrations to curry-like at high concentrations. A method described for its preparation comprises condensation of ethyl propionate with diethyl oxalate and reaction of the intermediately formed diethyl oxalylpropionate with acetaldehyde. Acidic decarboxylation of the ethyl 4,5-dimethyl-2,3-dioxodihydrofuran-4-carboxylate gives the title compound.
Chemische Eigenschaften
clear yellow liquid
Occurrence
Reported found in roasted Virginia tobacco, beef broth, beer, sherry, botryized wine, coffee, tea, fenugreek, sake and rice wine.
Verwenden
4,5-Dimethyl-3-hydroxy-2(5H)-furanone-13C3 is a labelled analogue of 4,5-Dimethyl-3-hydroxy-2(5H)-furanone (D473600). 4,5-Dimethyl-3-hydroxy-2(5H)-furanone is a fragrant compound that is a key indicator of maple syrup urine disease, a disorder affecting newborn children that is the result of its inability to properly metabolize Valine (V094205), Leucine (L330110) and Isoleucine (I820175). 4,5-Dimethyl-3-hydroxy-2(5H)-furanone is naturally found in fenugreek seeds, and is an odourant present in sherry wines.
Definition
ChEBI: Sotolone is a butenolide. It has a role as a metabolite.
Aroma threshold values
Aroma characteristics at 1.0%; sweet, strong brown, cyclotene and maple like, caramel, toffee, maltol-like and burnt, brown sugar fenugreek-like, cooked and syrupy.
Taste threshold values
Taste characteristics at 5–25 ppm; sweet, caramel, maple, walnut, brown sugar, nutty, cotton candy, fenugreek and celery-like, rum, roasted meaty with a honey nuance

4,5-Dimethyl-3-hydroxy-2,5-dihydrofuran-2-one Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

28664-35-9, 4,5-Dimethyl-3-hydroxy-2,5-dihydrofuran-2-one Verwandte Suche:

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