General
Synonyms: butal, butaldehyde, butanal, butyl aldehyde, n-butyl aldehyde, butyric aldehyde, n-butyraldehyde, butalyde
Molecular formula: C4H8O
CAS No: 123-72-8
EC No: 204-646-6
Physical data
Appearance: colourless liquid with a very unpleasant smell
Melting point: -96 C
Boiling point: 75 C
Specific gravity: 0.800
Vapour pressure: 91.5 mm Hg at 20 C
Flash point: 12 F
Explosion limits: 1.4% - 12.5%
Autoignition temperature: 446 F
Stability
Stable. Incompatible with oxidizing agents, strong bases, strong reducing agents, strong acids. Highly flammable.
Toxicology
Harmful if swallowed, inhaled or absorbed through skin. Extremely destructive of mucous membranes, eyes and skin. Stench! Possible sensitizer. Corrosive - causes burns. High exposure may cause a build-up of fluid in the lungs (pulmonary edema), a medical emergency.
Inhalation may be fatal.
Toxicity data
IHL-RAT LC50 174 mg/m3/30m
SKN-RBT LD50 3560 mg kg-1
Risk phrases
R11 R20 R21 R22 R34.
Personal protection
Safety glasses and gloves. Effective ventilation.
Safety phrases
S2 S9 S29 S33.
