Period 6 element devices though concerns about the element's toxicity have led to mercury thermometers and sphygmomanometers being largely phased out in clinical environments in favor of alcohol-filled, galinstan-filled, digital, or thermistor-based instruments. It remains in use in scientific research applications and in amalgam material for dental restoration. It is used in lighting: electricity passed through mercury vapor in a phosphor tube produces short-wave ultraviolet light which then causes the phosphor to fluoresce, making visible light. Thallium is a chemical element with the symbol Tl and atomic number 81. This soft gray other metal resembles tin but discolors when exposed to air. The
Toxic Substances Control Act of 1976 safety standard. However, the EWG regarded CSIA as moving in the right direction because the EPA would have gained more authority to review existing chemicals and order companies to provide any relevant safety data about a specific chemical in question. Earthjustice further called for the final result of TSCA reform to be one that adequately protected workers continually exposed to hazardous chemicals, vulnerable populations, and communities most at risk because of high exposure to toxic chemicals. The CSIA would have required states to co-enforce any requirements laid out by the EPA, i.e. to have funding and man-power to enforce all