Gallium highly reactive (rubidium and caesium) nor highly toxic (mercury) and can therefore be used in metal-in-glass high-temperature thermometers. It is also notable for having one of the largest liquid ranges for a metal, and for having (unlike mercury) a low vapor pressure at high temperatures. Gallium's boiling point, 2673 K, is more than eight times higher than its melting point on the absolute scale, the greatest ratio between melting point and boiling point of any element. Unlike mercury, liquid gallium metal wets glass and skin, along with most other materials (with the exceptions of quartz, graphite, and Teflon), making it
International Institute of Risk & Safety Management International Institute of Risk & Safety Management The International Institute of Risk & Safety Management (IIRSM) is a professional membership body for safety practitioners worldwide. It is a registered British Charity (number 1107666) and UK Company limited by guarantee (number 5310696). IIRSM have two main membership streams. A “health and safety practitioner stream”, for those qualified or studying to be health and safety practitioners, and a “specialist stream”, for those who are qualified to degree or NVQ level 4 (or equivalent) and above, in a profession associated with health and safety practice but who hold no health and safety practitioner