product chemical refrigerants  r-11 , r-12 , r-22 , r-123 , r-134a , r-1141b , r-152a , r-404a , r-407c , r-410a chlorinated solvents   methylene chloride , perchloroethylene ,  trichloroethylene other products    acetone , amyl acetate , butyl acetate , butyl cellosolve