ALPHA-PYRONE
Synonym(s):α-Pyrone
- CAS NO.：504-31-4
- Empirical Formula: C5H4O2
- Molecular Weight: 96.08
- MDL number: MFCD00006639
- EINECS: 207-990-5
- SAFETY DATA SHEET (SDS)
- Update Date: 2024-06-27 15:48:13
What is ALPHA-PYRONE?
Chemical properties
clear yellow to brown liquid.
Polymerizes easily upon standing, particularly under alkaline conditions.
Very slightly soluble in water, soluble in
alcohol and oils.
Definition
ChEBI: 2H-pyran-2-one is the simplest member of the class of 2-pyranones that is 2H-pyran with an oxo substituent at position 2.
Synthesis Reference(s)
Journal of the American Chemical Society, 90, p. 2318, 1968 DOI: 10.1021/ja01011a020
Organic Syntheses, Coll. Vol. 6, p. 462, 1988
General Description
2H-Pyran-2-one (a-Pyrone) is a heterocyclic building block. Photochemistry of 2H-pyran-2-one has been investigated by laser flash photolysis with infrared detection. Ketene and a bicyclic lactone were obtained as major photoproducts.
Purification Methods
Dissolve -pyrone in Et2O, wash it with brine, dry (Na2SO4), f
Properties of ALPHA-PYRONE
| Melting point: | 8-9 °C |
| Boiling point: | 102-103 °C20 mm Hg(lit.) |
| Density | 1.197 g/mL at 25 °C(lit.) |
| refractive index | n |
| Flash point: | 94 °C |
| storage temp. | 2-8°C |
| form | Liquid |
| color | Clear yellow to brown |
| Odor | Pleasant hay-like, herbaceous-warm odor |
| BRN | 1511 |
Safety information for ALPHA-PYRONE
| 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. P301+P312:IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell. P302+P352:IF ON SKIN: wash with plenty of soap and water. P304+P340:IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
Computed Descriptors for ALPHA-PYRONE
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