Molecular Weight

88.01

Flammability Limits in air

Nonflammable

Specific Gravity,
Gas @ 70&degF(21.1&degC),
1 atm(Air=1)

3.05

Density,
Gas @ 70&degF
(21.1&degC), 1 atm

0.228lbs/ft^3 (3.65g/l)

Specific Volume,
Gas @ 70&degF
(21.1&degC), 1 atm

4.4ft^3/lb (275ml/g)

Boiling Point @ 1 atm

-198.2&degF (-127.9&degC)

Melting Point @ 1 atm

-304.2&degF (-186.8&degC)

Critical Temperature

50.0&degF (-45.6&degC)