Trichloroethylene was used as an industrial degreaser years ago, it was banned because it was highly carcinogenic. Now weaker derivatives are used, while they might still be referred to as trichloroethylene, it is not quite the same stuff, they have a similar make up and behave in the same way but do not cause cancer.
An alternative to trichloroethylene is tetrachloroethylene, also known as perchloroethylene (PERC). It is commonly used as a replacement solvent for degreasing and dry cleaning processes due to its similar properties but with fewer environmental and health concerns.
INTERESTING I WAS SUBJECTED TO IT IN 1956 AND DEVELOPED COLON CANCER 3 YEARS AGO, A FRIEND WHO ALSO WORKED WITH ME IN THE AIR FORCE ON THE SAME GUN GLEANING HAS DEVELOPED COLON CANCER. WOULD BE INTERESTED TO KNOW IF ANY OTHERS HAVE HAD CANCER/ tadmann75@gmail.com