AMMONIA NH3
General Characteristics
Ammonia is a colorless, pungent, flammable gas at atmospheric pressure and temperature. It is irritating to the mucous membranes and toxic in high concentrations. Ammonia is shipped as a liquefied gas under its own vapor pressure.
Physical Information
Molecular Weight
17.030
Flammability Limits in air
15 - 28%
Specific Gravity,
Gas @ 70&degF(21.1&degC),
1 atm(Air=1)
0.594
Density,
Gas @ 70&degF
(21.1&degC), 1 atm
0.04lbs/ft^3 (0.71ml/g)
Specific Volume,
Gas @ 70&degF
(21.1&degC), 1 atm
22.6ft^3/lb (1.411ml/g)
Boiling Point @ 1 atm
-28&degF (-33.4&degC)
Melting Point @ 1 atm
-107.9&degF (-77.8&degC)
Critical Temperature
270.4&degF (132.4&degC)
Toxicity
PEL
50 ppm
TLV-TWA
25 ppm
STEL
35 ppm
LC50RAT
7338 ppm
IDLH
500 ppm