... % and 85% / Technical Phosphoric Acid / Phosphoric Acid food grade Phosphoric Acid 75%,80% and 85%min,food grade,tech grade ... (p4). Technical grade n phosphoric acidn can be directlyn used nas n polishingn agentnn for aluminium products, n rustn products, rust ... preventer for steel andn iron,n phosphating agent, metaln cleanser,n organic synthesis catalyst, fine electronic plating. Food ...