Phosphoric acid, also known as orthophosphoric acid or monophosphoric acid, is a common inorganic acid with the chemical formula H3PO4. The appearance is colorless, transparent and syrupy liquid. It is odorless, sour, easily soluble in water and ethanol. And its solubility increases with increasing temperature. In addition, the density of orthophosphoric acid is usually greater than that of water, and the specific value generally varies with temperature and concentration. More importantly, phosphoric acid has many important applications in food, medical, fertilizer and other industries. Therefore, phosphoric acid can be used as food additives, dental and orthopedic surgery, rust inhibitors, electrolytes, fluxes, dispersants, industrial corrosives, fertilizer raw materials and household cleaning products.
Of course, if the concentration and impurity content of phosphoric acid H₃PO₄ are different, the color will also be different. As a leading manufacturer and exporter, Chemate phosphoric acid for sale (75% & 85%) mainly includes food grade and industrial grade. But their product specifications are different. Please check the table below and get the latest phosphoric acid price list!
| Item | Index | |||
| Food Grade Phosphoric Acid 75%/85% | Tech Grade Phosphoric Acid 75%/85% | |||
| Color/Hazen ≤ | 20 | 20 | 30 | 30 |
| Phosphoric acid (H3PO4) content, % ≥ | 85.0 | 75.0 | 85.0 | 75.0 |
| Arsenic (As) content, % ≤ | 0.00005 | 0.00005 | 0.005 | 0.005 |
| Fluorine (F) content, % ≤ | 0.001 | 0.001 | — | — |
| Heavy metal (Pb) content, % ≤ | 0.0005 | 0.0005 | 0.001 | 0.001 |
| (Fe) % ≤ | — | — | 0.002 | 0.002 |
| Easily oxidized substances (H3PO3) content, % ≤ | 0.012 | 0.012 | — | — |
| (CL) % ≤ | — | — | 0.0005 | 0.0005 |
| (SO4), % ≤ | — | — | 0.005 | 0.005 |
Applications of Different Grades Phosphoric Acid
Industrial Grade Phosphoric Acid 75%/85%
- Industrial grade phosphoric acid is used for removing dust from the metal surfaces.
- Can be used as rust converter by bringing it in direct contact with a rusted iron, or steel tools and other surfaces that are rusted.
- It is helpful in cleaning the mineral deposits, cement nous smears and hard water stains.
Food Grade Phosphoric Acid 75%/85%
The food grade phosphoric acid 75%/85% is mainly used as an acid agent for seasonings, canned foods, refreshing beverages, and as a nutrient for yeast (a nutritional source for yeast during brewing, which can prevent the reproduction of miscellaneous bacteria).
- Fertilizer grade phosphoric acid is the raw material for the production of important phosphate fertilizers (superphosphate, potassium dihydrogen phosphate, etc.), and also the raw material for the production of feed nutrients (calcium dihydrogen phosphate).
- Medical grade phosphoric acid is an important ingredient in over the counter medications to combat nausea.
- Dentistry: phosphoric acid is mixed with zinc powder and forms zinc phosphate, and it is useful in temporary dental cement. In orthodontics, zinc is used as an etching solution to help clean and roughen the surface of teeth.
- Water treatment. Phosphoric acid can be used in water treatment, including drinking water and industrial water. By adding an appropriate amount of phosphoric acid to the water, the deposition of scale and calcium and magnesium ions can be effectively prevented, thereby improving water quality.
- Metal surface treatment. The industrial grade phosphoric acid can be used for metal surface treatment, such as phosphating treatment of metals such as steel, aluminum and copper. Through phosphating treatment, a dense phosphating film can be formed on the metal surface to improve the corrosion resistance and wear resistance of the metal.
- Acidity. It is a medium-strong acid that can ionize hydrogen ions in aqueous solution, showing acidity.
- Stability. It is relatively stable at room temperature and not easy to volatilize, but phosphoric acid may decompose or react to form other phosphates under high temperature or alkaline environment.
- Reducibility. Phosphoric acid can show reducing properties under certain conditions and can undergo redox reactions with oxidants.
There are two main methods for preparing phosphoric acid: wet phosphoric acid and thermal phosphoric acid.
Wet phosphoric acid is produced by the reaction of sulfuric acid with phosphate rock. The process includes ore crushing, sulfuric acid leaching, filtration, purification, concentration and other steps.
Thermal phosphoric acid is produced by the reaction of phosphate rock with oxygen or silicon dioxide at high temperature.
Phosphoric acid is corrosive and irritating to human skin and eyes, and may even cause burns. Therefore, when using phosphoric acid, we must take strict safety precautions, such as wearing protective glasses, gloves, work clothes, etc. If you accidentally come into contact with phosphoric acid, you should immediately rinse with plenty of water and seek medical attention as soon as possible.
During the production and use of phosphoric acid, a certain amount of wastewater and waste residue will be generated. In order to protect the environment, it is necessary to strictly comply with environmental protection requirements and use appropriate treatment methods to treat these wastes. Wastewater can be treated through neutralization, precipitation, filtration and other processes, and then discharged after meeting the discharge standards; waste residue can be solidified or recycled. In addition, we should improve the production process level of phosphoric acid and reduce the generation of waste.
Why Choose Chemate COMPANY
Chemate technology Co., Ltd is a comprehensive company based on phosphorus chemical industry, integrating R&D, production, sales and service. Our products mainly include phosphoric acid, sodium tripolyphosphate (STPP), sodium hexametaphosphate (SHMP), trisodium phosphate(TSP), sodium acid pyrophosphate(SAPP), diammonium hydrogen phosphate(DAP) and other phosphate chemicals.
- As a leading manufacturer in China, Chemate has more than 15 years of experience in the phosphorus chemical industry.
- Chemate has its own factory and raw materials, production workshop, large warehouse and professional sales team.
- All of Chemate products have passed many quality certifications, such as ISO9001, SGS, HACCP, KOSHER, HALAL, etc.
- Our phosphoric acid chemicals have been exported to Vietnam, Philippines, Thailand, Indonesia, Saudi Arabia, Pakistan, Bangladesh, Chile, Ghana, Israel, Mexico, Brazil, Turkey, South Korea, Australia, Colombia, etc. At the same time, we have also established long-term and friendly cooperative relations with many new and old customers.
- We always try our best to provide the good quality products and competitive prices for all the clients. Looking forward to work with you!