Boron Trichloride (BCI3) Boron trichloride (BCl3) is a toxic, colorless, corrosive gas produced as a liquid under its own vapor pressure. Richmond, Virginia customers who want a high quality, local producer of boron trichloride should contact Arc3 Gases at (804) 644-4521.Boron trichloride has a number of known utilizations, including as a starting material for the manufacture of elemental boron. It has been normally associated with the preparation and refining of aluminium, magnesium, zinc, and copper alloys to eliminate nitrides, carbides, and oxides from molten metal, although many of these processes have moved away from North America.It still finds some use when mixed with other compounds as a soldering flux for alloys of aluminium, iron, zinc, tungsten, and monel. Most BCl3 in North America was used before in the creation of electrical resistors, to help create a carbon film over a ceramic base. At this time, most Ultra High Purity Boron Trichloride (BCl3) is utilized in plasma etching in semiconductor manufacturing. This gas etches metal oxides by formation of boron chlorates.Cylinder quantities of PurityPlus® High Purity Boron Trichloride are also distributed to many chemical research facilities and universities for use as a reagent in the synthesis of organic chemicals.