parts washer fluid questions

Yup. I had a 55 gallon drum of it that I was given when a machine shop went under. The old guy that owned it brought it back with him from the Navy. It was about 35 gallons in that 55 gallon drum with a ring lock lid. It was not a name brand. It just had a corrosive sticker on it and said carbon tetrachloride. When it would get "weak" I had another 55 gallon drum I would strain it into and them rinse the original out and put it back in and it was good as new. Worked great. The bottom of the barrel developed a pin hole I didn't know about and it leaked out between uses. Really pissed me off.