Mercury in liquid form is just not that hazardous given reasonable care. Over 50 years ago, I had a job that involved actually wading (really!) in liquid Mercury, and I did it for over two years without any health problems, even though I had essentially constant daily exposure. Liquid Mercury is not hazardous, but exposure to Mercury vapors, and ingestion of soluble Mercury salts is. At room temperature, vaporization of liquid Mercury is vanishingly small, so vapor exposure is no consideration at all. And there is no absorption through skin. Nonetheless, one must be extremely careful in using it to avoid spills. I have a small plastic bottle with perhaps 3 ounces (liquid measure, not weight) of Mercury I occasionally use for lead removal. I always use it outside, never inside, and always provide containment against any possible spillage during use. I have no idea where someone finds Mercury today. I've had my little bottle for many, many years, and keep it stored carefully inside another sealed container. Nothing beats it for lead removal.