Borates Borax

Sodium borate (borax) [1330-43-4] M 201.2, m 741 , d 2.37. Most of the water of hydration was removed from the decahydrate by evacuation at 25° for three days, followed by heating to 100° and evacuation with a high-speed diffusion pump. The dried sample was then heated gradually to fusion (above 966°), allowed to cool gradually to 200°, then tranferred to a desiccator containing P2O5 [Grenier and Westrum J Am Chem Soc 78 6226 1956]. [Pg.466]

Sodium, 22 700 ppm (2.27%) is the seventh most abundant element in crustal rocks and the fifth most abundant metal, after Al, Fe, Ca and Mg. Potassium (18 400 ppm) is the next most abundant element after sodium. Vast deposits of both Na and K salts occur in relatively pure form on all continents as a result of evaporation of ancient seas, and this process still continues today in the Great Salt Lake (Utah), the Dead Sea and elsewhere. Sodium occurs as rock-salt (NaCl) and as the carbonate (trona), nitrate (saltpetre), sulfate (mirabilite), borate (borax, kemite), etc. Potassium occurs principally as the simple chloride (sylvite), as the double chloride KCl.MgCl2.6H2O (camallite) and the anhydrous sulfate K2Mg2(S04)3 (langbeinite). There are also unlimited supplies of NaCl in natural brines and oceanic waters ( 30kgm ). Thus, it has been calculated that rock-salt equivalent to the NaCl in the oceans of the world would occupy... [Pg.69]

Benzoate can be used as an anodic inhibitor and is effective at preventing waterline attack. Phosphate is also sometimes included. Sodium borate (borax) is usually added to the formulation to provide an alkalinity reserve buffer. Typically, a copper inhibitor such as benzo-triazole (BTA) or tolyltriazole (TTA) also forms part of a formulation and is used to provide yellow metal (copper and brasses) protection. [Pg.395]

Acid A process for making sodium perborate by reacting sodium borate ( borax ) with sodium peroxide and hydrochloric acid ... [Pg.11]

Benson, W.H., W.J. Birge, and H.W. Dorough. 1984. Absence of mutagenic activity of sodium borate (borax) and boric acid in the Salmonella preincubation test. Environ. Toxicol. Chem. 3 209-214. [Pg.1582]

Solution A is a 0.1 molar soln of potassium dihydrogen phosphate, prepd by dissolving 13.61 g of ACS grade material in distd w and diluting to 1 liter Solution B is a 0.05 molar soln of sodium borate (borax) prepd by dissolving 19.10 g of ACS grade material in distd w and diluting to 1 liter... [Pg.166]

Sodium xylene sulfonate Sodium borate (borax)... [Pg.89]

Potassium Citrate (Haarman Reimer Corp.) Ethyl alcohol Calcium chloride Sodium borate (borax)... [Pg.90]

Due to their low dehydration temperatures and water solubilities, boric acid and sodium borates (borax pentahydrate and borax decahydrate) are mostly used as fire retardants in wood/cellulosic products such as timbers, plywood, particle board, wood fiber, paper products, and cotton products. In recent years, boric acid has also been used as fire retardant in epoxy intumescent coating, pheno-lics, urethane foam, and so on. When necessary, boric acid can be coated with silicone oil such as silicone to alleviate its water solubility in water-based coating. [Pg.211]

This gel is usually prepared by adding 1 part of a 4 mass % aqueous sodium borate (borax) solution to 3 or 4 parts of a 4 mass % aqueous poly(vinyI alcohol) solution. [Pg.252]

Crystalline Ferric Oxide.—Small crystals of ferric oxide may be obtained by fusing amorphous ferric oxide with sodium borate (borax), and extracting them from the cooled mass with the aid of dilute aqueous... [Pg.115]

Sodium Borate Borax Anhydrous Sodium Biborate Sodium Pyroborate Sodium Tetraborate Anhydrous ... [Pg.256]

Anhydrous, fused sodium borate, borax glass, fused borax. Powder or glass-like plates becoming Opaque on exposure to air. Slowly so] in water. [Pg.1358]

For type 4a the three-phase line LGSn runs through a pressure maximum between the triple point of the pure component II and the quadrupole point Q where a liquid and a gaseous phase coexist with the pure solid components I and II. This curve represents the vapour pressure curve above a solution saturated with solid component II it can be determined quite easily by experiment in a closed autoclave filled with component I and an excess of solid component II and has been found for aqueous solutions of NaCl, boric acid, borates, borax, etc. ... [Pg.111]

Zinc borate Borax Consolidated, Climax Molybdenum, Joseph Storey, Alcan Chemicals... [Pg.86]

Sodium borates Borax pentahydrate Na2O.2B2O3.5H2O 49... [Pg.67]

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