IUPAC Name: Ethyl N-[(ethoxycarbonylamino)methyl]carbamate
Synonyms of Methylene diurethan (CAS NO.3693-53-6): Bis(N-ethoxycarbonylamino)methane ; Diethyl methylenebiscarbamate ; Diethyl methylenedicarbamate ; Methylene bisurethane ; Methylene diurethane ; N,N-Methylene-bis(ethyl carbamate) ; Carbamic acid, methylenebis-, diethyl ester (9CI) ; Diethyl methylenedicarbamate
CAS NO: 3693-53-6
Molecular Formula: C₇H₁₄N₂O₄
Molecular Weight : 190.1971
Molecular Structure:
EINECS: 223-011-4
H bond acceptors: 6
H bond donors: 2
Freely Rotating Bonds: 6
Polar Surface Area: 59.08Ų
Index of Refraction: 1.448
Molar Refractivity: 45.21 cm³
Molar Volume: 168.6 cm³
Surface Tension: 37 dyne/cm
Density: 1.127 g/cm³
Flash Point: 151.1 °C
Enthalpy of Vaporization: 56.84 kJ/mol
Boiling Point: 326.2 °C at 760 mmHg
Vapour Pressure: 0.000219 mmHg at 25°C
Melting Point: 130-131°C

Risk Statements: 40
R40: Limited evidence of a carcinogenic effect.
Safety Statements : 22-36/37
S22: Do not breathe dust. 
S36/37: When Methylene diurethan (CAS NO.3693-53-6) is used,wear suitable protective clothing and gloves.
RTECS: FC2200000

Questionable carcinogen with experimental tumorigenic data. When heated to decomposition it emits toxic fumes of NO_x. See also CARBAMATES.