qThere are two kinds of CFCs:
freon-11 (CCl3F)
and freon-12 (CCl2F2).
q
qFreon-11
has been used:
q (1) as a propellant in spray cans
q (2) as a blowing agent for producing foams
q (3) to clean
semiconductor chips.
q
qFreon-12
has been used as
q (1) a refrigerant
q (2) working fluid in most car air conditioners.