HFC-125 (R-125) is largely used in fire suppression system. HFC-125 is non-ozone depleting replacement for Halon 1301. HFC-125 in sufficient concentrations poses a health and safety hazard. At high temperatures, HFC-125 may decompose to produce highly toxic Hydrogen Fluoride gas.
Occupational Exposure Values - Compiled by ACGIH
(shown for reference only - verify latest values)