5,6-Dihydro-2H-pyran-2-one
[CAS# 3393-45-1]

Identification

• Classification: Pharmaceutical intermediate >> Heterocyclic compound intermediate >> Pyran compound
• Name: 5,6-Dihydro-2H-pyran-2-one
• Synonyms: 5-Hydroxy-2-pentenoic acid delta-lactone; 5,6-Dihydro-2-pyranone; 5,6-Dihydro-alpha-pyrone; delta-2-Pentenolide
• Molecular Formula: C₅H₆O₂
• Molecular Weight: 98.10
• CAS Registry Number: 3393-45-1
• EC Number: 628-075-0

Properties

• Density: 1.123
• Boiling point: 234 °C
• Refractive index: 1.4827
• Flash point: 89 °C

Safety Data

• Risk Statements: 10
• Safety Statements: 23;24/25

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Flammable liquids	Flam. Liq.	3	H226