Air & Water Reactions
Highly flammable. Soluble in water.
Behavior in Fire: Vapor is heavier than air and may travel considerable distance to a source of ignition and flash back.
ChEBI: An aldehyde that consists of ethane bearing a formyl substituent. The parent of the class of propanals.
Vapors will irritate nose and throat, and may cause nausea and vomiting. Liquid causes eye irritation.
Propionaldehyde may form explosive peroxides. Reacts vigorously with oxidizing agents. Explosive in the form of vapor when exposed to heat or flame [Lewis]. Incompatible with strong bases and strong reducing agents. Vigorous polymerization reaction with methyl methacrylate. Polymerization may also occur in the presence of acids or caustics .
A clear colorless liquid with an overpowering fruity-like odor. Less dense than water. Flash point 15°F. Vapors are heavier than air.
the aldehyde with CaSO4 or CaCl2, and fractionally distil it under nitrogen or in the presence of a trace of hydroquinone (to retard oxidation). Blacet and Pitts [J Am Chem Soc 74 3382 1952] repeatedly distilled the middle fraction in a vacuum until it no longer gave a solid polymer when cooled to -80o. It is stored with CaSO4. [Beilstein 1 IV 3165.]