Home › Chemicals › Isopentane CAS 78-78-4: Isopentane (C5H12) Identity CAS Number 78-78-4 Molecular Formula C5H12 IUPAC Name 2-methylbutane Molecular Weight 72.15 g/mol SMILES CC(C)CCSynonyms 2-methylbutane, isopentane, isoamyl hydride
2D Structure
Physical Properties Density 0.62 g/mL at 25°C Boiling Point 27.7°C Melting Point -159.9°C Flash Point -51.0°C Vapor Pressure 92.0 kPa at 20°C Refractive Index nD = 1.354 Dielectric Constant ε = 1.84
Safety & GHS Classification Flammable Irritant Health Hazard GHS09
H224: Extremely flammable liquid and vapor H304: May be fatal if swallowed and enters airways H336: May cause drowsiness or dizziness H411: Toxic to aquatic life with long lasting effects Storage: EXTREME FIRE HAZARD — store in explosion-proof refrigerator. Boiling point 27.7°C — evaporates rapidly at room temperature. Use explosion-proof equipment only.
Material Compatibility Matrix Plastics Material Rating PTFE Excellent PVC Fair PE Good PP Good PEEK Excellent PVDF Good
Rubbers Material Rating Viton Severe Effect NBR Severe Effect EPDM Severe Effect Silicone Poor FKM Severe Effect
Metals Material Rating Stainless 316 Excellent Aluminum Excellent Copper Excellent Brass Excellent
Applications Polyurethane foam blowing agent Geothermal power plant working fluid Laboratory solvent Gasoline blending component Chromatography solvent Environmental testing (volatiles analysis) External References: PubChem
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