Refrigerant R1234YF Possible Dangers

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The refrigerant is combustible in a specified mixture ratio with the surrounding air. Refer to REFRIGERANT R1234YF PHYSICAL AND CHEMICAL CHARACTERISTICS and REFRIGERANT R1234YF COMBUSTIBILITY/DECOMPOSITION .
Quick evaporation of the fluid can cause frostbite.
High vapor concentrations can cause headaches, dizziness, drowsiness, sleepiness and nausea and can even lead to loss of consciousness.