Home › Chemicals › Acetaldehyde CAS 75-07-0: Acetaldehyde (C2H4O) Identity CAS Number 75-07-0 Molecular Formula C2H4O IUPAC Name ethanal Molecular Weight 44.05 g/mol SMILES CC=OSynonyms ethanal, acetic aldehyde, MEAldehyde
2D Structure
Physical Properties Density 0.784 g/mL at 25°C Boiling Point 20.2°C Melting Point -123.4°C Flash Point -38.0°C Vapor Pressure 99.0 kPa at 20°C Refractive Index nD = 1.332 Dielectric Constant ε = 21.0
Safety & GHS Classification Flammable GHS05 Irritant
H224: Extremely flammable liquid and vapor H302: Harmful if swallowed H315: Causes skin irritation H319: Causes serious eye irritation H335: May cause respiratory irritation H341: Suspected of causing genetic defects H336: May cause drowsiness or dizziness Storage: EXTREME FIRE HAZARD — store in explosion-proof refrigerator. Very low boiling point (20.2°C). Suspected mutagen. Use in fume hood with explosion-proof equipment. Keep away from all ignition sources.
Material Compatibility Matrix Plastics Material Rating PTFE Excellent PVC Poor PE Good PP Good PEEK Excellent PVDF Good
Rubbers Material Rating Viton Fair NBR Severe Effect EPDM Fair Silicone Poor FKM Fair
Metals Material Rating Stainless 316 Excellent Aluminum Good Copper Good Brass Good
Applications Acetic acid production (Wacker process) Pyridine and pentaerythritol synthesis Flavor and fragrance agent (fruit aromas) Preservative (in combination with other agents) Silvering mirror manufacturing Fuel additive Polymer crosslinking agent External References: PubChem
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