Anhydrous Ammonia (NH3) Ammonia (NH3) is a pungent, colorless, toxic gas more properly called anhydrous ammonia. When ammonia is used in combination with carbon dioxide to produce urea, it is the building block chemical for most agricultural fertilizers. Until the end of the nineteenth century, just about all fertilizers were organic in the modern sense. They were derived from composting agricultural, animal and human waste. As the world population grew, so did its need to feed itself. Far to many years of slash and burn agriculture, along with raising the same crops in the same fields for scores of years had led to severe soil depletion. Imported guano was getting pricey as crops yields were falling. Haber’s process of directly combining nitrogen and hydrogen to create ammonia created an entire synthetic fertilizer industry in Europe and North America. Once good quality, plentiful and inexpensive ammonia came on the market, in addition to agricultural chemicals, a cutting-edge synthetic dye industry developed, as well as the first successful automatic document duplication process. In our time most world-scale ammonia is created and directly used in the agriculture industries. Cylinder quantities of Anhydrous 99.99% Pure Ammonia are also used in agricultural and fertilizer research, metal treatment, wastewater treatment and pharmaceuticals, and when mixed with water to create aqueous ammonia, in cleaning products. Ultra High Purity Ammonia, 99.999% is used as a blending component in calibration gases for emission and personal hygiene monitoring, as well as some specialty semiconductor manufacturing. Indianapolis customers looking for a reliable, local source to produce ammonia specialty gases should contact American Welding & Gas, Inc.. Their strong record of service in the area coupled with the backing from PurityPlus® Specialty Gases makes giving them an easy decision.