| 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 Properties |
| Molecular Weight |
17.030 |
| Flammability Limits in air |
15 - 28% |
Specific Gravity,
Gas @ 70°F(21.1°C), 1 atm(Air=1) |
0.594 |
Density,
Gas @ 70°F(21.1°C), 1 atm |
0.04lbs/ft^3 (0.71ml/g) |
Specific Volume,
Gas @ 70°F(21.1°C), 1 atm |
22.6ft^3/lb (1.411ml/g) |
| Boiling Point @ 1 atm |
-28°F (-33.4°C) |
| Melting Point @ 1 atm |
-107.9°F (-77.8°C) |
| Critical Temperature |
270.4°F (132.4°C) |
| Toxicity |
| PEL |
50 ppm |
| TLV-TWA |
25 ppm |
| STEL |
35 ppm |
| LC50RAT |
7338 ppm |
| IDLH |
500 ppm |
