Argon fluoride

Formula :
CAS : 59680-91-0 

Used in excimer lasers for ocular structures.

Argon, Elemental

Formula : Ar
CAS : 7440-37-1 

A noble gas with the atomic symbol Ar, atomic number 18, and atomic weight 39.948. It is used in fluorescent tubes and wherever an inert atmosphere is desired and nitrogen cannot be used.