Can I go back to R12 from Freeze12??

[AdMaven]

Right after I bought my 89 300E, I took it to have my A/C recharged. They did a leak detection and found none but suggested I use Freeze12.

What did I know?? This was before I found this forum.

Now I'm reading horror stories in this forum about my car exploding from Freeze12 (20% propane, etc) and am scared to death!!

Can I have my A/C flushed thoroughly and go back to R12 or have I ruined it?

I live in the desert and don't want to convert to R134 because it is in the 100's out here in the summer.