1,2-Dichloro-1,1,2,3,3-pentafluoropropane (HCFC-225bb)

Production and past use as a precision-cleaning and aerosol solvent; releases from older products and waste handling; emissions at facilities that used it [1][2].

Breathing vapors at work; leaks from stored products; living or working near industrial sites; skin or eye contact with liquid. Vapors can accumulate in low areas and displace oxygen [3][4].

Depletes the stratospheric ozone layer and contributes to climate change; short-term high exposure may cause dizziness, headache, and irregular heartbeat; liquid can cause frostbite on contact [1][3][4].

Workers in electronics/metal cleaning or aerosol use; people in poorly ventilated or confined spaces; those with heart or lung conditions may be more sensitive [3][4].

Prefer EPA SNAP-listed alternatives; use local exhaust ventilation/closed systems; check for leaks; follow the SDS and wear gloves/eye protection; dispose of legacy stocks per EPA rules [1][2].