Borontrichloride

Boron trichloride Product Information Quality Code 3.0 4.5 Purity % volume >99.9 >99.995 Impurities ppm (where nothing else started) Cl2 <100 <25 COCl2 <900 <10 Si(X) <10 <10 CCI4 <1 General information Filling pressure at 15oC, bar: 1.1 Material recommendations: . Acid-resistant steel, monel, PTFE, PVC, hastelloy. Characteristics Liquefied gas, decomposes in water to hydrogen chloride and boric acid. Forms white fumes in humid air. Pungent odour. Highly corrosive. Health risks Highly toxic. Attacks the eyes and mucous membranes. Can cause lung damage. Transport ADR Class 2, 3(at) Physical data Molecular weight: 117.17Boiling point at 1.013 bar, C: 12.5Density (1.013 bar, 15 9oC) kg/m3: 5.18Vapour pressure at 0 C, bar: 0.63 20 C, bar: 1.3Flammability range in air, % (volume): Non combustible Specific volume (1.013 bar, 15 C), m3/kg: 0.193 Source Boron trichloride is produced by reacting together one of the following sets of ingredients. In each case the reaction requires elevated temperatures. a) Finely divided carbon plus boric acid and chlorine.b) Boric oxide plus the chloride of either sodium, potassium or lithiumc) Sodium boronfluoride plus magnesium chlorided) Boron carbide plus chlorine. Applications Boron trichloride is used as a chemical reagent in the pharmaceutical industry. Boron trichloride is used as a source of boron for ip-type doping of silicon by thermal diffusion or ion implantation. It is also used for dry plasma etching of aluminum and its alloys. Boron trichloride is used in refining metals such as aluminum, magnesium, zinc and copper alloys. By bubbling the gas through these molten metals nitrides, carbides and oxides are removed. The same technique is used to clean up castings of these metals. In this case occluded gases such as nitrogen, hydrogen and carbon monoxide are also removed from the casting. Boron trichloride may be used in the production of optical fibers. Boron trichloride is the starting material for the production of boron nitride, used as a refractory coating on such articles as crucibles etc. Boron trichloride is used as a carrier gas, as a catalyst in organic reactions, for manu facturing of electrical resistors.