4, 5-Dimethyl-3-Hydroxy-2, 5-Dihydrofuran-2-One; CAS 28664 -35-9

Colour
Yellow
Shelf Life
2-3 Years
Lead Time
5-7 Working Days
Transport
Air/Express/Sea
MOQ
10g
Site Audit
Available
Certificates
ISO9001/SGS
Stocks
in Stock
Package
1kg/5kg/10kg/25kg
Purity
99%
Samples
Available
Transport Package
Drum/Bottle/Bags
Trademark
Yunbang
Origin
China
Reference Price
Please contact us for quote
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Product Description

4,5-Dimethyl-3-hydroxy-2,5-dihydrofuran-2-one;CAS 28664-35-9

4, 5-Dimethyl-3-Hydroxy-2, 5-Dihydrofuran-2-One; CAS 28664-35-9
 
 
4,5-Dimethyl-3-hydroxy-2,5-dihydrofuran-2-one Chemical Properties
Melting point 26-29 °C(lit.)
Boiling point 184 °C(lit.)
density 1.049 g/mL at 25 °C
FEMA 3634 | 4,5-DIMETHYL-3-HYDROXY-2,5-DIHYDROFURAN-2-ONE
refractive index n20/D 1.491(lit.)
Fp >230 °F
storage temp. Sealed in dry,2-8°C
pka9.28±0.40(Predicted)
form neat
JECFA Number243
InChIKeyUNYNVICDCJHOPO-UHFFFAOYSA-N
CAS DataBase Reference28664-35-9(CAS DataBase Reference)
NIST Chemistry Reference2(5H)-furanone, 3-hydroxy-4,5-dimethyl-(28664-35-9)
EPA Substance Registry System2(5H)-Furanone, 3-hydroxy-4,5-dimethyl- (28664-35-9)
 
Safety Information
Hazard Codes Xn
Risk Statements 20/22
Safety Statements 36
WGK Germany 3
HS Code 29329990
 
4,5-Dimethyl-3-hydroxy-2,5-dihydrofuran-2-one Usage And Synthesis
Chemical Propertiesclear yellow liquid
Chemical Properties3-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 propi onate with di ethyl ox alate and reaction of the intermediately formed diethyl oxalylpropionate with ac etaldehyde. Acidic decarboxylation of the ethyl 4,5-dimethyl-2,3-dioxodihydrofuran-4-carboxylate gives the title compound.
OccurrenceReported found in roasted Virginia tobacco, beef broth, beer, sherry, botryized wine, coffee, tea, fenugreek, sake and rice wine.
Aroma threshold valuesAroma 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 valuesTaste 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; CAS 28664-35-9
 
4, 5-Dimethyl-3-Hydroxy-2, 5-Dihydrofuran-2-One; CAS 28664-35-94, 5-Dimethyl-3-Hydroxy-2, 5-Dihydrofuran-2-One; CAS 28664-35-94, 5-Dimethyl-3-Hydroxy-2, 5-Dihydrofuran-2-One; CAS 28664-35-94, 5-Dimethyl-3-Hydroxy-2, 5-Dihydrofuran-2-One; CAS 28664-35-9
Company Informations:

Hunan Yunbang Pharmaceutical Co., Ltd. (Yunbangpharm) located in Changsha High-tech Industrial Park, Hunan. It is a high-tech enterprise specializing in the research and development, production and sales of Pharmaceutical raw materials, Pharmaceutical intermediates(API) and Fine chemicals. Based in China, Yunbangpharm has been providing suitable solutions for many domestic,foreign pharmaceutical companies and traders. Excellent quality, good reputation and authentic price have won the praise of the majority of customers.
The company adheres to the corporate tenet of "We do not produce medicines, but help pharmaceutical companies make good medicines".

We can provide customers with customized processing, research and development services;
We can develop high-end Pharmaceutical and chemical products with high technical difficulties,high barriers and unique production processes;
We can provide 100 grams Grade, kilograms, and hundred kilograms of raw material pharmaceutical intermediates and other products.
We can perform -100°C to 300°C reaction.

R&D strength is the company's core competitiveness.Yunbangpharm has maintains a good cooperation relationship with many Universities and Research institutes locally, which can quickly transform R&D results into industrial production.

Our goal : To achieve the integrated upgrade of Pharmaceutical intermediates, raw materials and high-end chemical products, adhere to "serving pharmaceutical companies, creating our brands" to provide customers with high-quality and low-cost pharmaceutical and chemical products, realizing Win-win cooperation and common development.

 

Organic Intermediate

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