What is the density of nitrogen at 100 psi?

8.51 g/l at standard temperature (0 degrees Celsius,) but 7.93 g/l at room temperature (20 degrees Celsius).

1.251 g/l * 1 ATM / (100 psi * .0680459639 ATM/psi) = 8.51 g/l

1.251 g/l * 1 ATM / (100 psi * .0680459639 ATM/psi) / (293 K / 273 K) = 7.93 g/l