Molecular Formula: C₅H₁₀Cl₂O₂
Molar mass: 173.04 g/mol
EINECS: 203-920-2
Density: 1.18 g/cm³
Flash Point: 76.9 °C
Index of Refraction: 1.437
Boiling Point: 205.9 °C at 760 mmHg
Vapour Pressure: 0.35 mmHg at 25°C 
Water solubility: Slightly soluble in water
Appearance: A colorless liquid
Structure of Bis(2-chloroethoxy)methane (111-91-1):

XLogP3-AA: 1.2
H-Bond Donor: 0
H-Bond Acceptor: 2
Systematic Name of Bis(2-chloroethoxy)methane (111-91-1): 1-Chloro-2-(2-chloroethoxymethoxy)ethane 
SMILES: ClCCOCOCCCl 
InChI: InChI=1/C5H10Cl2O2/c6-1-3-8-5-9-4-2-7/h1-5H2 
InChIKey: NLXGURFLBLRZRO-UHFFFAOYAO 
Std. InChI: InChI=1S/C5H10Cl2O2/c6-1-3-8-5-9-4-2-7/h1-5H2 
Std. InChIKey: NLXGURFLBLRZRO-UHFFFAOYSA-N

Reported in EPA TSCA Inventory.

Poison by ingestion, inhalation, and skin contact. A skin and eye irritant. Combustible when exposed to heat or flame. Incompatible with oxidizers. To fight fire, use alcohol foam, foam, CO₂, dry chemical. When heated to decomposition it emits toxic fumes of Cl⁻. See also CHLORIDES.
 

Hazard Codes: Xi

 Bis(2-chloroethoxy)methane (111-91-1) also can be called Ethane, 2,2'-[methylenebis(oxy)]bis[1-chloro- ; Formaldehyde bis(.beta.-chloroethyl) acetal ; 1-Chloro-2-[(2-chloroethoxy)methoxy]ethane ; 1,1'-[methylenebis(oxy)]bis(2-chloroethane) ;and 1,1'-[methanediylbis(oxy)]bis(2-chloroethane) .