Since the phaseout of R-12, R-134a has grown to become the standard refrigerant choice for household appliances, small self-contained refrigeration units, very large chillers, and automotive air conditioning.

R-134a is an HFC refrigerant, which requires POE lubricant to be used in the compressor.

NORMAL HANDLING AND STORAGE
NORMAL HANDLING: (Always wear recommended personal protective equipment.)
Avoid breathing vapors and liquid contact with eyes, skin or clothing. Do not puncture or drop cylinders, expose them to open flame or excessive heat. Use authorized cylinders only. Follow standard safety precautions for handling and use of compressed gas cylinders.
R-134A should not be mixed with air above atmospheric pressure for leak testing or any other purpose.