Aluminum Magnesium Potassium Ammonium Sodium Lithium Producer perchlorate perchlorate perchlorate perchlorate perchlorate perchlorate
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چکیده
Commercial interest in perchlorates began in the late 1890s/early 1900s in Europe and the United States as a direct result of the pioneering efforts in rockets and their propulsion systems (Mendiratta et al. 1996). The production of ammonium perchlorate, the largest component of solid rocket propellants, far outpaced that of the other perchlorates listed in Table 4-1. Their commercial manufacture began later, and it was not until 1928 when GFS Chemicals began producing magnesium perchlorate for use as a dessicant (GFS 1997) that these salts became available on the U.S. market. Up until 1940, the total worldwide production of perchlorates had not exceeded 3.6 million pounds. An abrupt change in production was realized with the onset of World War II and the resulting increase in demand for rocket and missile propellants. Annual perchlorate production quickly increased to 36 million pounds because of this demand and remained at a high level thereafter (Mendiratta et al. 1996). By 1974, U.S. perchlorate production had reached 50 million pounds (Vogt et al. 2005).
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2. Relevance to Public Health 2.1 Background and Environmental Exposures to Perchlorates in the United States
Perchlorates are high melting point inorganic salts that are soluble in water. There are five perchlorate salts that are manufactured in substantial amounts: magnesium, potassium, ammonium, sodium, and lithium perchlorate. Perchlorates are powerful oxidizing agents and at elevated temperatures, they can react explosively. The production volume of ammonium perchlorate far outpaces the other salt...
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Contamination of freshwater resources, fresh produce and some processed foods by perchlorate (ClO4 -) is a growing problem in the United States. The anion perchlorate is a naturally occurring as well as an anthropogenic chemical which occurs as salts of ammonium, sodium and potassium. The natural sources of perchlorate include Chilean caliche which is mined for use as a natural source of NaNO3 ...
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