CONCOA Precision Gas Controls

Ammonia (NH3)
DESCRIPTION (Ammonia):

At room temperature and atmospheric pressure, ammonia is a colorless, alkaline gas having a pungent odor. Ammonia dissolves readily in water. It is shipped as a liquefied gas under its own vapor pressure of 114 psig at 70° F. Typical uses for ammonia include soil fertilization, industrial refrigeration, metal treating operations, and the manufacture of alkalis, salts, dyes, pharmaceuticals and nylon.

PHYSICAL CONSTANTS (Ammonia):

Molecular Weight: 17.031
Vapor Pressure of pure liquid @ 70° F.: 114.1 psig
Specific Volume @ 70° F., 1 atm.: 22.6 cu.ft/lb
Boiling Point @ 1.0 atm. : -28.0° F
Triple Point @ 1 atm. : -107.9° F
Triple Point Pressure 45.58 mm Hg
Specific Gravity, Gas @ 0° C., 1 atm. (Air = 1): 0.5970
Density, Gas @ b.p.: 0.00089 g/ml
Density, Liquid @ b.p.: 0.674 g/ml
Critical Temperature: 270.4° F
Critical Pressure: 1639 psia
Critical Density: 0.235 g/ml
Latent Heat of Vaporization @ b.p. 589.4 BTU/lb
Flammable Limits in Air: 15-28% by volume
Autoignition Temperature: 635° F
Gross Heat of Combustion @ 60° F., 1 atm. 1483.8 BTU/ft3
Specific Heat, Gas @ 25° C., 1 atm. Cp: 0.5160 BTU/lb.° F
Specific Heat, Gas @ 25° C., 1 atm. Cv: 0.4065 BTU/lb.° F
Specific Heat Ratio, Gas @ 25° C., 1 atm., Cp/Cv: 1.269
Thermal Conductivity, Gas @ 0° C, 1 atm. : 5.22x10-4 cal/(sec) (cm2 )(° C/cm)
Viscosity, Gas @ 25° C., 1 atm. : 0.00918 centipoise
Viscosity, Liquid @ -33.5° C., 1 atm. : 0.266 centipoise
Heat of Formation, Gas @ 25° C.: -11.4 kcal/mole
Entropy, Gas @ 25° C., 1 atm. : 45.967 cal/mol ° C
Solubility in Water @ 0° C., 1 atm. : 42.8% by weight
Solubility in Methanol (absolute) : 29.3% by weight
Solubility in Ethanol (absolute) : 20.95% by weight

COMPATIBLE MATERIALS (Ammonia):

All equipment coming in contact should be constructed of iron or steel. All piping should be rigid steel. Steel reinforced neoprene should be used for short connections.

CYLINDER CONNECTIONS (Ammonia):

Standard CGA V-1 Cylinder Connection threaded: CGA 240, CGA 705
Standard CGA V-1 Cylinder Connection yoke: CGA 800, CGA 845
Standard CGA V-1 Cylinder Connection ultra high integrity: CGA 720