Molecular Formula: NH4Cl Ammonium Chloride, packed in Ribble Valley UK, supplied in aluminium doypack pouch with resealable zip grip and heat seal or plastic tub USES Biology and Agriculture In biological applications ammonium chloride acts as a nitrogen source and is used in fertilizers, as a feed supplement for cattle  and as an ingredient in nutritive media for yeast microbiological organisms Textile and Leather Ammonium chloride is used in the textile and leather industry in dyeing, tanning textile printing and to luster cotton. Metalwork Ammonium chloride is used as a flux in preparing metals to be tin coated, galvanized or soldered. It works as a flux by cleaning the  surface of work pieces by reacting with the metal oxides at the surface to form a volatile metal chloride. It is sold in blocks at hardware stores  for use in cleaning the tip of a soldering iron and can also be included in solder as flux. Other Applications Ammonium chloride is used in a ~5% aqueous solution to work on oil wells with clay swelling problems.  It is also used as electrolyte in Zinc–carbon batteries. Other uses include in hair shampoo, in the glue that bonds plywood, in cleaning products.