1) Colour: Light yellow colour softer powder 2) Produce process: Spray dry process/ Filter press 3) Basicity: at 70-85% 4) Water insoluble matter: lowest at 0.1%max 5) Iron content (Fe+) : 0.1%max. 6) lowest heavy metal content, health 7) The solution: is colourless to light yellow liquid 8) Certificate approved by NSF ANSI/60 certification 9) Used for drinking water treatment.