I = Insufficient data available to determine the compatibility
with the intended gas.
S = Satisfactory with use with the intended gas (dry anhydrous) at normal operating temperature of 70^oF

U = Unsatisfactory for use with the intended
gas.
C = Compatability depends on conditions of use.

NOTE:   This chart is intended as a guide only. Actual applications may include variables which can affect the compatability of certain materials with particular gases. Contact our gas supplier for additional compatibility information reguarding the gases being used. The user should be throughly familiar with the specific properties of the gas material compatability depends on conditions of use.