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What is phosphoric acid and what are its applications?

What is phosphoric acid and what are its applications?2021.01.08

What is Phosphoric acid and how is it manufactured?

Phosphoric acid, also known as orthophosphoric acid or phosphoric(V) acid, is a weak acid with the chemical formula H3PO4. It is normally encountered as a colorless syrup of 85% concentration in water. The pure compound is a colorless solid. The name "orthophosphoric acid" can be used to distinguish this specific acid from other "phosphoric acids", such as pyrophosphoric acid.

Phosphoric acid is produced industrially by two general routes. In the wet process a phosphate-containing mineral such as calcium hydroxyapatite is treated with sulfuric acid.

To produce food-grade phosphoric acid, phosphate ore is first reduced with coke in an electric arc furnace, to make elemental phosphorus. Silica is also added, resulting in the production of calcium silicate slag. Elemental phosphorus is distilled out of the furnace and burned with air to produce high-purity phosphorus pentoxide, which is dissolved in water to make phosphoric acid.

What are the main usages of phosphoric acid?

The dominant use of phosphoric acid is for fertilizers.

Also, it could be used in many applications, such as soaps and detergents, food industry, water treatment, toothpastes and others.



Main phosphate derivatives

Soaps and detergents


Food industry


Water treatment




Other applications

STPP (Na3P3O9), TCP, APP, DAP, zinc phosphate (Zn3(PO4)2), aluminium phosphate (AlPO4, H3PO4)


Food-grade phosphoric acid is used to acidify foods and beverages such as various colas and jams, providing a tangy or sour taste. Soft drinks containing phosphoric acid, which would include Coca-Cola, are sometimes called phosphate sodas or phosphates. 


Please check our summary page for Phosphoric Acid and Phosphates for below different phosphate derivatives:

1. Phosphoric Acid

2. Ammonium Phosphates

3. Potassium Phosphates

4. Sodium Phosphates

5. Calcium Phosphates

6. Urea Phosphate

OKCHEM Distribution Project for Phosphoric Acid and Phosphates

If you want to join us to be the distributor of Chinese factories for Phosphoric Acid and Phosphatesplease contact us at You may also make the application online at:

Below for your information are our factories of Phosphoric Acid and Phosphates. 

FISINO: FISINO has efficient team with 20 years’ experience in Phosphates industry, and we supply our clients with stable quality and diversified products for various applications.

SICHUAN OLLIANCE TECHNOLOGY CO.,LTD: The main products are mono ammonium phosphate (MAP), di-ammonium phosphate (DAP), NP/NPK compound fertilizers and soluble fertilizers, mono-potassium phosphate (MKP), urea phosphate (UP), potassium nitrate (NOP) and potassium sulphate (SOP).

SHIFANG QISHAN CHEMICAL CO. , LTD: The company mainly produces phosphate series of food additives, food-grade phosphate products are: food grade phosphoric acid, ammonium dihydrogen phosphate, diammonium phosphate, potassium dihydrogen phosphate, dipotassium hydrogen phosphate, sodium dihydrogen phosphate, Sodium, trisodium phosphate and so on.

Shifang Zhixin Chemical: the company is founded in 2008, is located in Shifang of Sichuan Province which is one of four famous phosphorous zones in China. Zhixin Chemical is a technology-based company and attaches great importance to technological innovation. Our products in line with ISO9001, HACCP, KOSHER, HALAL Certification standard.

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