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| CAS No.: | 675-09-2 |
|---|---|
| Name: | 4,6-Dimethyl-2-pyrone |
| Article Data: | 28 |
| Molecular Structure: | |
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| Formula: | C7H8 O2 |
| Molecular Weight: | 124.139 |
| Synonyms: | Sorbicacid, 5-hydroxy-3-methyl-, d-lactone (6CI,7CI); 2,4-Dimethyl-a-pyrone; 4,6-Dimethyl-2-pyranone;4,6-Dimethyl-2-pyrone; 4,6-Dimethyl-2H-pyran-2-one; 4,6-Dimethyl-a-pyrone; Mesitene lactone; NSC402790 |
| EINECS: | 211-618-7 |
| Density: | 1.065 g/cm3 |
| Melting Point: | 48-50 ºC |
| Boiling Point: | 245 ºC |
| Flash Point: | 90.1 ºC |
| Solubility: | 242.4g/L(59.7 oC) |
| Appearance: | yellow solid |
| Safety: | Moderately toxic by intraperitoneal route. When heated to decomposition it emits acrid smoke and irritating fumes. See also COUMARIN. |
| PSA: | 30.21000 |
| LogP: | 1.25660 |
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Chemistry
IUPAC Name: 4,6-Dimethylpyran-2-one
Synonyms: 2,4-Dimethyl-alpha-pyrone ; 4,6-Dimethyl-2h-pyran-2-on ; 4,6-Dimethylcoumalin ; Mesitene lactone ; Sorbic acid, 5-hydroxy-3-methyl-, delta-lactone ; 4,6-Dimethyl-pyran-2-one ; 4,6-Dimethyl-alpha-pyrone ; 4,6-Dimethyl-2-pyrone
Molecular Structure : 
Molecular Formula: C7H8O2
Molecular Weight: 124.14
CAS NO: 675-09-2
EINECS: 211-618-7
Product Categories: Miscellaneous
Mol File: 675-09-2.mol
Index of Refraction: 1.485
Surface Tension: 30.5 dyne/cm
Density: 1.065 g/cm3
Flash Point: 90.1 °C
Melting point 48-50 ºC
Enthalpy of Vaporization: 48.21 kJ/mol
Boiling Point: 245 °C at 760 mmHg
Vapour Pressure: 0.0294 mmHg at 25°C
Appearance: 4,6-Dimethylcoumalin (CAS NO. 675-09-2) is white to light yellow crystal powder.
Toxicity Data With Reference
| 1. | ipr-mus LD50:750 mg/kg | APTOA6 Acta Pharmacologica et Toxicologica. 2 (1946),109. |
Consensus Reports
Reported in EPA TSCA Inventory.
Safety Profile
Moderately toxic by intraperitoneal route. When heated to decomposition it emits acrid smoke and irritating fumes. See also COUMARIN.
Safety Statements 24/25
S24/25: When 4,6-Dimethylcoumalin (CAS NO. 675-09-2) is used ,avoid contact with skin and eyes.
WGK Germany 3
RTECS UQ0700000
Specification
General Information: As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear.
Extinguishing Media: Use water spray, dry chemical, carbon dioxide, or chemical foam.
Handling: Avoid breathing dust, vapor, mist, or gas. Avoid contact with skin and eyes. Avoid ingestion and inhalation.
Storage: Store 4,6-Dimethylcoumalin (CAS NO. 675-09-2) in a cool, dry place. Store in a tightly closed container.