You are purchasing 1 lb. of 99.5+% Ammonium Chloride (label says 99+%).  YOUR SAMPLE will be re-bottled from a 100 lb. drum.  This is not the pre-treated material that contains free-flowing agents.  It is very pure with a minimum purity of 99.5%.  For Lab or R&D; use only.  NOT for food or drug use.