Toxicity of Molybdenum towards Humans

We distinguish between acute toxicity and chronic, or long, term toxicity. The occurrence of acute poisoning is easy to detect since it produces obvious and often dramatic symptoms and ultimately death. Most experimental studies of molybdenum poisoning have been concerned with possible acute toxic effects. It is clear from the data summarised here that acute molybdenum poisoning in human beings is very unlikely: a massive dose would be required [National Research Council 9, 1980]. Compared with some metals used industrially (antimony, arsenic, beryllium, cadmium, chromium, lead, mercury) molybdenum is of very low toxicity [Saunders, 1956; Browning, 1969; Ashmead, 1972; Nguyen-Phu-Lieh, 1971]