if approved by the compressor manufacturer, then yes, if not, then no...
R22
No.
R22
R22
R22 r123
r22
R22
No, because R22 is a 'harmless' gas. Just observe the material safety data sheet (msds) and keep it on hand.
After 1992- r134A Before 1992- R22 but it need to be retrofitted for R134 if it hasn't been done already. It is ILLEGAL to use R22 in autos.
No, refrigerants cannot be blended.
No
ef22a is a refrigerant. It is used in place of R22. It is a Hydrocabon refrigerant. Very efficient.....