Home › Chemicals › 1,1,1-Trichloroethane CAS 71-55-6: 1,1,1-Trichloroethane (C2H3Cl3) Identity CAS Number 71-55-6 Molecular Formula C2H3Cl3 IUPAC Name 1,1,1-trichloroethane Molecular Weight 133.4 g/mol SMILES CC(Cl)(Cl)ClSynonyms methyl chloroform, 1,1,1-trichloroethane, TCA, chlorothene
2D Structure
Physical Properties Density 1.322 g/mL at 25°C Boiling Point 74.0°C Melting Point -32.0°C Flash Point None°C Vapor Pressure 13.3 kPa at 20°C Refractive Index nD = 1.438 Dielectric Constant ε = 7.1
Safety & GHS Classification Irritant Health Hazard GHS09
H319: Causes serious eye irritation H336: May cause drowsiness or dizziness H361: Suspected of damaging fertility or the unborn child H373: May cause damage to organs through prolonged or repeated exposure H412: Harmful to aquatic life with long lasting effects Storage: Store in cool, well-ventilated area. Non-flammable but decomposes to phosgene and HCl under UV light. Store away from strong oxidizers, bases, and active metals. Use in fume hood.
Material Compatibility Matrix Plastics Material Rating PTFE Excellent PVC Poor PE Poor PP Fair PEEK Excellent PVDF Good
Rubbers Material Rating Viton Excellent NBR Fair EPDM Good Silicone Good FKM Excellent
Metals Material Rating Stainless 316 Excellent Aluminum Excellent Copper Excellent Brass Excellent
Applications Metal degreasing and cleaning solvent Electronics cleaning solvent (historical) Adhesive solvent Aerosol propellant (historical) Dry cleaning solvent (historical) Refrigerant manufacturing intermediate Laboratory solvent External References: PubChem
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