Additionally , selenium hexafluoride is designated as IDLH chemical with a maximum allowed exposure limit of 2 ppm .
In the U.S. , OSHA and ACGIH standards for selenium hexafluoride exposure is an upper limit of 0.05 ppm in air averaged over an eight - hour work shift .
Selenium hexafluoride is designated as IDLH chemical with a maximum allowed exposure limit of 2 ppm .
In the U.S. , OSHA and ACGIH standards for selenium hexafluoride exposure is an upper limit of 0.05 ppm in air averaged over an eight - hour work shift .