Preparation of borax is the basic raw material boron-containing compound, almost all containing boron can be prepared by the borax. They metallurgy, steel, machinery, military, tools, paper, tubes, chemical and textile sectors have an important and wide range of uses. 3. hydrochloric acid titration solution (0.1mol / L), preparation: take hydrochloric acid 9.0mL, add water to make into 1000mL, shake, have 0.1mol / L hydrochloric acid titrant. To about 0.4g, accurately weighed, add water 25ml dissolved, add 0.05% methyl orange solution 1 drop titration with hydrochloric acid solution (0.1mol / L) titrated to orange-red, boil for 2 minutes, cooled, as the solution is yellow and continue titration until the solution was orange-red, and neutral glycerol (glycerin take 80ml, 20ml water and phenolphthalein indicator solution 1 drop of sodium hydroxide (0.1mol / L) titrated to pink) 80ml and phenolphthalein indicator solution 8 drops, titrated with sodium hydroxide solution (0.1mol / L) to a pink color. Each 1ml of sodium hydroxide (0.1mol / L) is equivalent to 9.534mg of Na2B4O7.10H2O. Herbicide for non-farming area Destuctive weeding, addition to individual, mixed with sodium chlorate, sodium chlorate to reduce flammability. In refrigerators, freezers, air conditioners and other refrigeration equipment welding repairs often as (inactive) flux for purifying the metal surface. Remove oxides on the metal surface; adding a certain percentage of sodium chloride in borax. Compound sodium fluoride, potassium chloride can be used as an active flux for soldering copper pipe and steel pipe, steel pipe and steel pipe between the refrigeration equipment. [Occurrence and composition] produced in the evaporation of salt lake sediments and dry arid regions in Salt Lake with rock salt, trona, Ulexite, thenardite, mirabilite potassium, calcium Glauber's salt, gypsum, calcite, saltpeter sodium carbonate Glauber's salt and other associated rare sulfate. In dry air, dehydration becomes easy to tripartite borax borax as a white powder. Character identification borax borax and shape due to the different processing methods are different, borax, have fall-shaped or bowl-shaped. Fall with irregular shaped conical, cone coupling on a rope-like clusters; bowl-shaped upper portion is slightly recessed, surface uneven, with which the columnar, granular crystals, semicircular lower than smooth. Today more goods irregular blocks, Shandong borax, sizes. It is colorless transparent or white translucent; glass-like sheen. Long home in the air, easy to wind into a white powder. Lighter in body, brittle and fragile. Odorless, slightly salty taste first, after microstrip sweet, slightly cool feeling. Soluble in water, soluble in boiling water or glycerol. Colorless and transparent, clean, crisp lightweight body preferably borax | Three-ping Chemical | borax factory provided by the Jinan Chemical Co., Ltd. three levels. Borax | Three-ping Chemical | borax factory in Jinan three ping Chemical Co. (www.sanpinghuagong.com) this year introduced a new upgrade, the above picture is for reference only, please call the telephone or pictures on this page, for the latest information, contact Person: Su Jingli.