Heavy metals(as Pb)
Phosphoric acid or orthophosphoric acid, is a common inorganic acid, is a medium-strong acid.
Phosphoric acid or orthophosphoric acid, is a common inorganic acid, is a medium-strong acid.Phosphoric acid is mainly used in pharmaceutical, food, fertilizer and other industries, including as a rust resistance agent, food additives, dental and orthopedic surgery, EDIC preservatives, electrolytes, welding flux, dispersants, industrial preservatives, fertilizer as raw materials and component home cleaning products.Can be also used as a chemical reagent.
The dominant use of phosphoric acid is for fertilizers, consuming approximately 90% of production.
Food-grade phosphoric acid (additive E338) is used to acidify foods and beverages such as various colas and jams, providing a tangy or sour taste. The phosphoric acid also serves as a preservative. Soft drinks containing phosphoric acid, which would include Coca-Cola, are sometimes called phosphate sodas or phosphates. Phosphoric acid in soft drinks has the potential to cause dental erosion.Phosphoric acid also has the potential to contribute to the formation of kidney stones, especially in those who have had kidney stones previously.
Specific applications of phosphoric acid include:
l in anti-rust treatment by phosphate conversion coating or passivation
l to prevent iron oxidation by means of the Parkerization process
l as an external standard for phosphorus-31 nuclear magnetic resonance
l in phosphoric acid fuel cells
l in activated carbon production
l in compound semiconductor processing, to etch Indium gallium arsenide selectively with respect to indium phosphide
l in microfabrication to etch silicon nitride selectively with respect to silicon dioxide
l as a pH adjuster in cosmetics and skin-care products
l as a sanitizing agent in the dairy, food, and brewing industries
Phosphoric acid usually store phosphoric acid in a cool, well-ventilated area protected from moisture. Keep away from incompatible substances such as oxidizing agents, metals, combustible materials, and alkalis.
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