STP=0C, 1atm                    
Volume of Cerenkov vessel 120 cuft 3398 liters            
1 mole at STP 22.414 liters                
Air density (PDG02) 1.205 (g/l at 20C 1atm)              
                     
Warning: index and density may not all be at same nominal pressure and temperature            
          boiling     vapor    
    Index of   P threshold point @ 1atm   density pressure Ozone  
Gas Formula refraction sinThetaMax Gev/c C M. Weight g/l psi Depleting Flammable
FC 75 C8H16O 1.00274 0.0739 1.8841 102 257.36     No No
Perfluorohexane C6F14 1.002 0.0632 2.2057 54       No No
Isobutane C6H10 1.0019 0.0616 2.2630 -12 58.12 2.59   No Yes
Perfluoropentane C5F12 1.00172 0.0586 2.3786 54 288.04     No No
Perfluorobutane (20C) C4F10 1.00153 0.0553 2.5221 -2 238.03 10.12 32.5 No No
Freon114 (20C) C2Cl2F4 1.0014 0.0529 2.6367 4 170.92 7.15 27.6 Yes No
Freon C318 C4F6 1.001285 0.0506 2.7522 -6 200.03     No No
Freon12 CCl2F2 1.00108 0.0464 3.0023 -30 120.9     Yes No
Ethane C2H6 1.0009 0.0424 3.2890 -89 30.07     No Yes
Freon13 B1 CBrF3 1.000864 0.0415 3.3568 -168 148.9     Yes No
Freon116 C2F6 1.0008 0.0400 3.4886 -79 138.01     No No
Freon13 CClF3 1.000782 0.0395 3.5285 -81 104.46     Yes No
Freon14 CF4 1.00046 0.0303 4.6010 -128 88.01     No No
SF6 SF6 1.00044 0.0297 4.7044 ? 146.06     No Slight
CO2 (STP) CO2 1.00041 0.0286 4.8735     1.977   No No
Air (STP)   1.000293 0.0242 5.7652 -194   1.2931   No No
Air (20C)   1.000273 0.0234 5.9726 -194   1.205   No No
                     
Octofluoropropane (PFG-3218) C3F8       -37 188.2 8.40   No No
Tetrafluoroethane (R134a) C2H2F4       -27 102 4.55   No No
                     
              0.00 = density estimated from molecular weight