IUPAC Name:Nonan-5-one
Synonyms : Dibutyl ketone
Molecular Structure:
Molecular Formula: C₉H₁₈O
Molecular Weight: 142.24
CAS NO: 502-56-7
EINECS: 207-946-5
Mol File: 502-56-7.mol
Density : 0.826
Melting point: -50 ºC
Boiling point: 186-187 ºC
Refractive index : 1.418-1.42
Flash point: 65 ºC
Surface Tension: 26.5 dyne/cm
Enthalpy of Vaporization: 42.62 kJ/mol
Vapour Pressure: 0.553 mmHg at 25°C
BRN : 1743583
Appearance: 5-Nonanone (CAS NO.502-56-7)  is clear colourless to slightly yellow liquid.

Reported in EPA TSCA Inventory.

Safety Statements 23-24/25
S23:Do not breathe vapour.
S24/25:Avoid contact with skin and eyes.
RIDADR UN 1224 3/PG 3
WGK Germany 3
RTECS RA8230000
PackingGroup III
HS Code 29141990

DOT Classification:  3; Label: Flammable Liquid

1.General Description : Colorless to light yellow liquid. Floats on water. Freezing point is 21°F.
2.Air & Water Reactions : 5-Nonanone (CAS NO.502-56-7)  is highly flammable.
3.Reactivity Profile : 5-Nonanone (CAS NO.502-56-7) are reactive with many acids and bases liberating heat and flammable gases (e.g., H₂). The amount of heat may be sufficient to start a fire in the unreacted portion of the ketone. Ketones react with reducing agents such as hydrides, alkali metals, and nitrides to produce flammable gas (H₂) and heat. Ketones are incompatible with isocyanates, aldehydes, cyanides, peroxides, and anhydrides. They react violently with aldehydes, HNO₃, HNO₃ + H₂O₂, and HClO₄. May attack some forms of plastics .
4.Health Hazard :Inhalation causes irritation of nose and throat. Ingestion causes irritation of mouth and stomach. Contact with eyes or skin causes irritation.