4H-Pyran-4-one

  • g-Pyrone
  • 4-Pyrone
  • 4-Oxo-4H-pyran
Formula
C5H4O2
Structure

Registry Numbers and Inventories.
CAS
108-97-4
EC (EINECS/ELINCS)
203-634-8
22 24/25
Beilstein/Gmelin
105293
Beilstein Reference
5-17-09-00290

Properties.
Formula
C5H4O2
Formula mass
96.09
Melting point, °C
32 - 34
Boiling point, °C
210 - 215
Vapor pressure, mmHg
0.17 (25 C)
Density
1.195 g/cm3 (40 C)
Solubility in water
Soluble
Refractive index
1.5078 (67 C)
Heat of vaporization
44.9 kJ/mol

Hazards and Protection.
Storage
Keep tightly closed. Store under nitrogen. Store at 2-8 C
Protection
Compatible chemical-resistant gloves. Chemical safety goggles.
Respirators
Government approved respirator.
Small spills/leaks
Sweep up, place in a bag and hold for waste disposal. Avoid raising dust. Ventilate area and wash spill site after material pickup is complete.
Incompatibilities
Strong oxidizing agents.
Decomposition
Carbon monoxide, Carbon dioxide.

Fire.
Flash Point,°C
101
Fire fighting
Extinguish using Water spray. Carbon dioxide, dry chemical powder, or appropriate foam. Wear self-contained breathing apparatus and protective clothing to prevent contact with skin and eyes.
Hazards
Emits toxic fumes under fire conditions.

Health.
Exposure effects
   Skin
May cause skin irritation.
   Eyes
May cause eye irritation.

First aid
 
   Ingestion
If swallowed, wash out mouth with water provided person is conscious. Call a physician.
   Inhalation
If inhaled, remove to fresh air. If not breathing give artificial respiration. If breathing is difficult, give oxygen.
   Skin
In case of contact, immediately wash skin with soap and copious amounts of water.
   Eyes
In case of contact, immediately flush eyes with copious amounts of water for at least 15 minutes.

Transport.