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Methylene Chloride

Names Preferred IUPAC nameDichloromethaneOther names Methylene bichloride; Methylene chloride gas; Methylene dichloride; Solmethine; Narkotil; Solaesthin; Di-clo; Refrigerant-30; Freon-30; R-30; DCM; MDCIdentifiers CAS Number75-09-23D model (JSmol)Interactive imageChEBICHEBI:15767ChEMBLChEMBL45967ChemSpider6104ECHA InfoCard100.000.763EC Number200-838-9KEGGD02330PubChemCID6344RTECS numberPA8050000UNII588X2YUY0AUN number1593 CompTox Dashboard(EPA)DTXSID0020868InChIInChI=1S/CH2Cl2/c2-1-3/h1H2Key: YMWUJEATGCHHMB-UHFFFAOYSA-NInChI=1/CH2Cl2/c2-1-3/h1H2Key: YMWUJEATGCHHMB-UHFFFAOYAGSMILESClCClProperties Chemical formulaCH2Cl2Molar mass84.93 g·mol Appearance Colorless liquid OdorFaint, minty, chloroform-like Density1.3266 g/cm (20 °C) Melting point−96.7 °C (−142.1 °F; 176.5 K) Boiling point39.6 °C (103.3 °F; 312.8 K) decomposes at 720 °C 39.75 °C (103.55 °F; 312.90 K) at 760 mmHg Solubility in water25.6 g/L (15 °C) 17.5 g/L (25 °C) 15.8 g/L (30 °C) 5.2 g/L (60 °C) SolubilityMiscible in ethyl acetate, alcohol, hexanes, benzene, CCl4, diethyl ether, CHCl3log P1.19 Vapor pressure0.13 kPa (−70.5 °C) 2 kPa (−40 °C) 19.3 kPa (0 °C) 57.3 kPa (25 °C) 79.99 kPa (35 °C) Henry's lawconstant (kH)3.25 L·atm/mol Magnetic susceptibility (χ)−46.6·10 cm/mol Refractive index (nD)1.4244 (20 °C) Viscosity0.43 cP (20 °C) 0.413 cP (25 °C) Structure Dipole moment1.6 D Thermochemistry Heat capacity(C)102.3 J/(mol·K) Std molarentropy(S298)174.5 J/(mol·K) Std enthalpy offormation(ΔfH298)−124.3 kJ/mol Std enthalpy ofcombustion(ΔcH298)−454.0 kJ/mol (from standard enthalpies of formation) Pharmacology Pharmacokinetics: Biological half-life<30 min (75% after 30 minutes, rats) ExcretionBreath (90% unmetabolized, 3% CO2, 2% CO, rats), urine Hazards Occupational safety and health (OHS/OSH): Eye hazardsIrritant GHS labelling: PictogramsSignal wordWarningHazard statementsH315, H319, H336, H351, H420Precautionary statementsP261, P280, P302+P352, P305+P351+P338, P308+P313NFPA 704 (fire diamond) 210Flash pointNone, but can form flammable vapor-air mixtures above ≈100 °C Autoignitiontemperature556 °C (1,033 °F; 829 K) Explosive limits13%-23% Lethal dose or concentration (LD, LC): LD50 (median dose)1.25 g/kg (rats, oral) 2 g/kg (rabbits, oral) LC50 (median concentration)24,929 ppm (rat, 30 min)14,400 ppm (mouse, 7 h) LCLo (lowest published)5000 ppm (guinea pig, 2 h)10,000 ppm (rabbit, 7 h)12,295 ppm (cat, 4.5 h)14,108 ppm (dog, 7 h) NIOSH (US health exposure limits): PEL (Permissible)25 ppm over 8 hours (time-weighted average), 125 ppm over 15 minutes (STEL) REL (Recommended)Ca IDLH (Immediate danger)Ca [2300 ppm] Legal statusBR:Class B1 (Psychoactive drugs)Supplementary data page Dichloromethane (data page)Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).Yverify ( ?)

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