Ammonium chloride, (sal ammoniac, NH4Cl) is available from RCFPL in two grades:

AMMONIUM CHLORIDE GRANULAR “C” is a high purity product which is naturally non-caking because of its unique particle size. These particles are 0.25 inch irregular nuggets, similar in size to rock salt. Because of the natural anti-caking properties of this size of granules, the product is chemically pure and is not treated with any anti-caking agent. Fine white ammonium chloride, with a particle size similar to table salt, requires treatment with anti-cakes to prevent rapid formation of hard-to-process chunks of caked material.
Unfortunately, anti-caking agents introduce unnecessary contaminants to galvanizing, plating, and other applications sensitive to impurities. These additives may cause difficulties in either performance and/or solution appearance and clarity. For example, the charts below show the clarity and color of solutions made up to 20% by weight with RCFPL Ammonium Chloride Granular “C” and a commercially available treated fine white Ammonium Chloride material.

The uses of ammonium chloride are many. Listed here are a very few applications. A principal use of ammonium chloride from RCFPL has been as a fluxing agent for hot dip galvanizing of steel and in the refining of zinc. Ammonium chloride provides fluxing action by reacting with molten zinc to form a stable melt containing zinc chloride and ammonium chloride.

The C and R grades are often used instead of formulated fluxes for their low cost and fast action. These grades are also used to rejuvenate flux blankets prepared with RCFPL* Galvanizing Fluxes. Unfortunately this will also generate higher levels of fume. Other applications for ammonium chloride include electrolyte for plating baths and/or batteries; fertilizer, personal care product formulations, pharmaceuticals, and other applications where the anticaking agent can cause problems.