PHOSPHINE PH3
General Characteristics
Phosphine is a highly toxic, flammable, colorless gas with an odor similar to that of decaying fish. The odor is subjective and therefore not reliable, and should not be used to detect the presence of the gas. It is subject to spontaneous combustion. Phosphine is shipped as a liquefied gas under its own vapor presure.
Physical Information
Molecular Weight
34.04
Flammability Limits in air
Non Available
Specific Gravity,
Gas @ 70&degF(21.1&degC),
1 atm(Air=1)
1.28
Density,
Gas @ 70&degF(21.1&degC), 1 atm
0.0955lb/ft^3 (1.53g/l)
Specific Volume,
Gas @ 70&degF(21.1&degC), 1 atm
10.47ft^3/lb (0.65l/g)
Boiling Point @ 1 atm
-125.99&degF (-87.77&degC)
Melting Point @ 1 atm
-208.8&degF (-133.8&degC)
Critical Temperature
124.9&degF (51.6&degC)
Critical Pressure
947.9 psia (65.4 bar)
Toxicity
PEL /TLV
0.3 ppm
STEL
1 ppm
LC50
20 ppm
IDLH
200 ppm