4,6-Dimethyl-2-pyrone Property

Melting point:

48-50 °C (lit.)

Boiling point:

170.92°C (rough estimate)

Density 

1.0538 (rough estimate)

refractive index 

1.3810 (estimate)

Flash point:

>230 °F

form 

Crystalline Low Melting Mass

color 

Yellow

Odor

at 10.00 % in dipropylene glycol. sweet caramel sugar green licorice balsam gourmand

Odor Type

caramellic

Water Solubility 

242.4g/L(59.7 ºC)

LogP

0.185 (est)

CAS DataBase Reference

675-09-2(CAS DataBase Reference)

NIST Chemistry Reference

2H-Pyran-2-one, 4,6-dimethyl-(675-09-2)

EPA Substance Registry System

2H-Pyran-2-one, 4,6-dimethyl- (675-09-2)

Safety

Safety Statements 

24/25

WGK Germany 

3

RTECS 

UQ0700000

HS Code 

29322985

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H302Harmful if swallowed

H319Causes serious eye irritation

Precautionary statements

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P270Do not eat, drink or smoke when using this product.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P301+P312IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P330Rinse mouth.

P501Dispose of contents/container to..…

4,6-Dimethyl-2-pyrone Chemical Properties,Usage,Production

Chemical Properties

white to light yellow crystal powder

Uses

4,6-Dimethyl-α-pyrone (Me₂1) has been used in the preparation of G₄C{Me₂1} via reacting with tetra-p-sulfocalix[4]arene (C) and guanidine hydrochloride (GCl). It may be used in the preparation of host-guest complex G₄C{Me₂1} by reacting with crystalline guanidinium-sulfonate-calixarene (G₄C). This complex on UV irradiation afforded 1,3-dimethylcyclobutadiene (Me₂CBD).

General Description

4,6-Dimethyl-α-pyrone was immobilized in a guanidinium-sulfonate-calixarene (G4C) crystalline network, which upon exposure to ultraviolet irradiation, transforms the entrapped 4,6-dimethyl-α-pyrone into a 4,6-dimethyl-β-lactone. Thin solid films layers of 4,6-dimethyl-α-pyrone on UV irradiation at -190°C were investigated.