What is phosphoric acid

Phosphoric acid is a crystalline acid obtained e.g. by treating phosphates with sulfuric acid, used in fertilizer and soap manufacture and food processing.

Due to its non-toxic properties, phosphoric acid is used by a variety of industries in multiple applications. Phosphoric acid can be found in cosmetic and skincare products, water treatment and metal cleaners, as well as fertilizer compounds. The chemical itself lends itself well to control the pH level of substances and as rust removal for metals including iron and steel.

  • Synonyms: orthophosphoric acid, phosphoric acid
  • INCI: Phosphoric Acid
  • Chemical formula: H3PO4
  • CAS # 7664-38-2
  • Hazard: Non-hazardous


Use the links below to view all package sizes for these specific products:

Phosphoric Acid 20%
Phosphoric Acid 55%
Phosphoric Acid 75%

Product Specifications

Appearancecolorless liquid
Tastetangy or sour
Solubilitiessolubleble in water
Density1.88 g/cm³
Boiling point316.4°F
Freezing point71°F
Molecular weight98
Weight per gallon14.0562 LBs
Classacid, phosphate, phosphate technical, phosphoric acid
GradesNF grade, NG/ACS, Reagent (ACS, AR), Reagent/U.V. Spectrophotometric, technical

Uses and Applications for Phosphoric acid

Phosphoric acid has many applications. Due to its non-toxic and mildly acidic nature, it is used in food flavoring, beverages, dental products, cosmetics, and skin care products. Industrially, it is used mainly in the production of phosphate fertilizers.

  • Coatings & Construction: metal finishers, corrosion inhibitors, removes mineral deposits,
    cement smears and hard water stains. It can act as an oxidizing agent to produce activated
    carbon products
  • Agriculture: fertilizer compounds. Phosphoric acid is also used as an additive and
    flavouring agent in animal or poultry feed.
  • HI&I: cleaning compounds, household cleaning agent, sanitizing agent
  • Pharmaceutical: dentistry as an etching solution to clean teeth, teeth whiteners
    or mouth washing liquids. It is also used commonly in anti-nausea medicines
  • Oil & Gas: petroleum
  • Personal Care: skin care products, cosmetics, shower gels, fragrances, hair care
    products and dyes, nail products, makeup
  • Other: water treatment, metal cleaners, rust removal agent, pH modifier

Quick Answers

Phosphoric acid is a weak acid used in personal skin care products, cosmetics as well as industrial cleaners and water treatments.

Knowing where to get phosphoric acid is probably just the beginning of your company’s chemical requirements. Don’t trust your critical phosphoric acid supply to just any company. Turn to the market leader in the United States and Canada for phosphoric acid distribution and benefit from our professional services and unbeaten track record on safe and reliable phosphoric acid delivery.

Your best approach will be to contact Brenntag North America. Brenntag is the established global market leader in ingredient and chemical distribution and can fully supply all your phosphoric acid and other chemical needs.

Phosphoric acid is available in bags, pails, kegs, metal drum, totes, and bulk quantities. You can view all phosphoric acids and package sizes on Brenntag Connect.

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