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nature : NaNO3 called Chile saltpeter. Natural production of sodium nitrate. Na2O with 36.5%, N2O563.5. Trigonal system. Appearing dense block, HUSK - or salt-China collectivities. White, light yellow or brown. Glass luster. Hardness 1.5 ~ 2. Density 2.24 ~ 2.29. Soluble in water and taste-Chatham. Chemical industry for caustic soda, nitrate, potassium nitrate and black powder; The metallurgical industrial use sodium nickel refining saltpeter for the strong oxidant; Glass cleaner industrial agent; Agriculture for the production of fertilizers. Production in dry or desert areas, mainly from decomposed organic matter decomposition by denitrifying bacteria and the role of nitrate and sodium in the soil quality latched onto.
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