Home › Chemicals › Methyl tert-Butyl Ether (MTBE) CAS 1634-04-4: Methyl tert-Butyl Ether (MTBE) (C5H12O) Identity CAS Number 1634-04-4 Molecular Formula C5H12O IUPAC Name 2-methoxy-2-methylpropane Molecular Weight 88.15 g/mol SMILES COC(C)(C)CSynonyms MTBE, tert-butyl methyl ether, methyl t-butyl ether, 2-methoxy-2-methylpropane
2D Structure
Physical Properties Density 0.741 g/mL at 25°C Boiling Point 55.2°C Melting Point -109.0°C Flash Point -28.0°C Vapor Pressure 27.0 kPa at 20°C Refractive Index nD = 1.369 Dielectric Constant ε = 2.6
Safety & GHS Classification Flammable Irritant
H225: Highly flammable liquid and vapor H315: Causes skin irritation H336: May cause drowsiness or dizziness H411: Toxic to aquatic life with long lasting effects Storage: Store in cool, well-ventilated area away from ignition sources. Extremely flammable. Use explosion-proof equipment. Ground containers during transfer. Contamination of groundwater is a major environmental concern.
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 Gasoline oxygenate additive (octane booster) Laboratory solvent Chemical intermediate Extraction solvent Pharmaceutical manufacturing Chromatography solvent External References: PubChem
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