The other name for R134 gas is tetrafluoroethane.
a gas
R 134 is freon gas. In small amounts, the exposure to freon gas is not dangerous. In larger amounts, freon can cause respiratory issues.
R134
More than likely R134. Look at the placard on the A/C unit.
R134 .... IS freon.
r134
The A/C compressor is driven by a belt attached to the engine which runs on gasoline. The A/C unit contains R134 refrigerant which is a gas.
R134 is used, but have the leak fixed first.
Generally speaking that is the "R12 Freon" used in the air conditioning up until around 1995. After that R134 and R134a is used.
Should be R134
r134 a r134 a