Potassium Carbonate is monoclinic crystal, white powder, granular crystal or prill. Potassium Carbonate is monoclinic crystal, white powder, granular crystal or prill. Potassium Carbonate CAS NUMBER:584-08-7Property:Potassium Carbonate is monoclinic crystal, white powder, granular crystal or prill. The relative density is 2.428 and the melting point is at 891 degree C .It is easily soluble in ...