Silver Mercury. Mercury (also known as quicksilver) is the only metal which is liquid at room temperature - it is well known for it's use in thermometers, but it is also widely used in scientific research, for dental restoration and in lighting. Mercury forms alloys with different metals easily - these alloys (called amalgams) can be used for creating dental fillings and are in use to create long-life batteries. IT'S MAIN APPLICATIONS ARE: AS CATALYST FOR THE PRODUCTION OF PVC (POLYVINYL CHLORIDE) IN ENERGY EFFICIENT CFL (COMPACT FLUORESCENT LIGHT) BULBS IN CATHODE CELLS IN INDUSTRIAL CHEMICALS IN PAINTS