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Boric acid is also commonly used as a disinfectant in hospitals. Borax inancient times have already known for the Arab alchemists, they get borax from Tibet, China. Boron is a rare earthelements in other countries. However, in China,there is a wealth of borax ore, boron in China is not a rare element, but a highyield elements!Although borax marked dealings has a longhistory, however, the pure, free form boron, until 1808 made by the UnitedKingdom of David France Gailvsake and Taina. Pure boron is a dark brown,rust-like boron powder, togetherwith aluminum to heat and melt, after cooling, can be obtained chunks ofcrystalline boron. Boron crystal is very hard, the same as diamond, and theyare heat-resistant, the melting point of 2075 ° C, it was used in themechanical industry instead of expensive diamond manufacturing cutting toolsand drill. Now, it is heated with a platinum wire is energized Boron tribromidevapor, at 1500 the borontribromide decomposition and get pure boron.The use of free state boron is not too large. In industry,added the millionth of boron to the aluminum, copper, nickel and other metals,can improve the mechanical properties of these metals. The uses of borax is muchbroader than the free stateof the boron, in industry it use to make porcelain, especially fusible glazeenamel. The borax also been used to manufacture a variety of heat-resistantglass and a filler as soap.In the point of chemical, borax has aspecial purpose: use a small circle made of platinum wire, dipped in a littleborax and put the heating on gas or alcohol lamp. At the beginning, borax willemerge in a number of small bubbles crystal water - heat evaporation, and thenmelt into a colorless liquid. After cooling, became a colorless transparentsolid, like a glass bead-like, firmly stick the small circle which made ofplatinum wire. If you are then dipped in a little metal oxide platinum wire onthe lights on the heat, cold, beads been significant on a variety of colors.E.g. dipped metallic cobalt oxide, the beads were blue; dip of chromium oxidegreen beads; dipped iron oxide, as a yellow beads (heat as a brown). Inanalytical chemistry, it is called borate beads reaction. Use different colorsof boric acid beads, can analysis of various metals. Now, metal powder supplier commonly useboric acid beads reaction to analysis of the metallic minerals collected in thewild, because this method of chemical analysis is very simple, you can quicklydetermine the chemical composition of the sample. Likewise, borax is often usedas a rust remover. Because when borax heated, melting the metal oxides on thesurface - rust. In addition, also used in fireworks borax, because when it isheated, it can radiate beautiful green light.What worth mentioning is that the boraxgradually became a important role in agriculture - Boron. It has been foundthat the boron content in the plants is not much, and only one hundredthousandth of the dry weight of plants to about one ten thousandth;, however,it is indispensable. If the soil lack of boron, flax, hemp and alfalfa plantswill stop growing, and even death. Sunflower lack of boron, will show up shriveledgrain, oil content decreased. If the beet lack of boron will have dry rot - theunderground stem rot away; lack of boron legume nodule development will also beaffected. According to the study, boron is one of the essential trace element inplant growth, plays a very important role in regulating carbohydrate metabolismof its plants. Apply the right amount into the fields to meet the needs of thecrops of boron. But boron application rate must be appropriate, not the morethe better; if use too much, the crops will be spared death, even the sheep atesuch crops leaves will get the enteritis, such enteritis in veterinary medicineknown as boron enteritis.Source:http://www.mhcmp.com
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