Degeneration of the optic nerve and papillomacular bundle with resulting loss of central vision and blindness, which is progressive for several weeks, then usually becomes stationary with permanent central scotoma; the age of onset is variable, most often in the third decade; more males than females are affected.
Fluoridation Chemicals. The fluoride chemicals used to fluoridate drinking water are: hydrofluorosilicic acid, sodium fluorosilicate, and sodium fluoride. Unlike the fluoride compounds found in toothpaste or supplements, fluoridation chemicals are not pharmaceutical grade quality.They are, instead, unpurified industrial by-products that are collected in the air pollution control systems of certain industries.he fluoride chemicals used to fluoridate drinking water are: hydrofluorosilicic acid, sodium fluorosilicate, and sodium fluoride.
Fluorite has three main types of industrial uses depending on its grade.Metallurgical grade fluorite is used in iron and steel production. Fluorite is used as a flux to lower melting points of molten metals and remove impurities such as phosphorus and sulfur. Every ton of metal produced requires 20 to 60 pounds of fluorite. Ceramic grade fluorite is used to make ceramics and specialty glassware.