Product Information

CAS Number:


Additive Number:


Chemical and physical data

Formula : H3PO4

Molar Mass: 97.994 g·mol−1

Density : 1.6845 g/cm3

Melting point : 40–42 °C

Boiling point : 212 °C

 Other Names

Orthophosphoric Acid ** DO NOT USE **
Phosphoric acid, >=25% aqueous solution
Orthophosphoric acid, >=25%
White Phosphoric Acid
Orthophosphoric Acid
O-Phosphoric Acid, 10% V/V
Phosphoric Acid 5% w/v solution
Phosphoric acid, 75%
Phosphoric Acid, 75-95%
Phosphoric acid, 70%
Phosphoric acid, 85%
Premierchlor Salt Cell Cleaner
Hydrogen phosphate, >=25%
Bitumen Additive
Phosphoric acid, 81%
o-Phosphoric acid, >=25%
Phosphoric Acid, 10%
White Phosphoric acid, >=25%
Phosphoric Acid, 75-95% ** DO NOT USE **


What Is phosphoric acid?

Phosphoric acid is a colorless, odorless crystalline liquid. It gives soft drinks a tangy flavor and prevents the growth of mold and bacteria, which can multiply easily in a sugary solution. Most of soda’s acidity also comes from phosphoric acid.
Phosphoric acid is made from the mineral phosphorus, which is found naturally in the body. It works with calcium to form strong bones and teeth. It also helps support kidney function and the way your body uses and stores energy.

Types of phosphoric acid

Phosphoric acid, also known as orthophosphoric acid, is a triprotic acid that exists as a dense liquid. It is an irritant or corrosive to the skin, eyes, and other mucous membranes of both humans and laboratory animals. Its salts, though, exhibit a significantly lower irritancy potential. Moderate toxicity has been observed in mice when exposed via the inhalation route. Phosphoric acid is not genotoxic nor carcinogenic, but phosphate salts have been reported to promote the activity of known carcinogens. Phosphoric acid has enjoyed significant interest as a food additive to various cola drinks, causing great controversy with regard to the potential for harmful effects.

History of Phosphoric Acid

The history of phosphoric acid has been long. Hennig Brand (c. 1630-1710) was a merchant and alchemist in Hamburg, Germany, who discovered phosphorus around 1669. Like other alchemists at the time, the brand was looking for "philosopher's stone," a substance that seems to have changed shape. Base metals (such as lead) are converted to gold. Like many before him, he loved water (H 2O) and tried to combine it with hundreds of different substances. Around 1669 he heated the remains of urine on the stove until it turned red. He poured the liquid into a glass and covered it, it turned pale green. What he collected was phosphorus, which he called "Norber" in Greek .

Industrial phosphoric acid

Phosphoric acid is an important industrial chemical used as an intermediate in the fertilizer industry, for metal surface treatment in the metallurgical industry and as an additive in the food industry. The Phosphoric acid industry is spread out worldwide in Europe, Asia and America, including countries. Acids, such as phosphoric (H3PO4), sulfuric (H2SO4), nitric (HNO3), hydrochloric (HCl) and acetic (CH3COOH) acids, are broadly applied in many industries: chemical, fertilizers, mineral leaching, water purification, petroleum refining, food and metal production. Apatite is the most important PR applied in the production of industrial and food grade phosphoric acid. It is mainly of the fluoride and hydroxide type. Both rocks contain many impurities: fluoride (F−), chloride (Cl−), iron and aluminum oxides (Fe2O3, Al2O3); pyrites (ferrous sulfide, FeS) and fossilized organic matter. These interfere with production procedures, impair the phosphoric acid quality and enhance corrosion and deterioration of metallic and plastic materials used for fabrication of equipment and rubber linings for reactor walls.


Everything about phosphoric acid:
• It is a non-volatile, white crystalline solid in its purest form and in manufactures through phosphate rock treatment.

• Phosphoric acid is a non-toxic odorless acid with the Boiling point of 158 degree Celsius and a melting point of 42.35 degree Celsius.

• Phosphoric acid reacts in a different way from other mineral acids as it has 3 H-atoms which are replaceable and acidic.

• It can form three different classes of salts by reacting with bases.

• It is soluble in water and alcohol and the most common sources of it are an 85% aqueous solution. Other facts about this acid:

Phosphoric acid ph = 1.5

Phosphoric acid density = 1.8741

Why is phosphoric acid in Coke and other consumable products? Food and beverage manufacturers like it because it’s cheap, adds tartness and acts as a preservative.

Phosphoric acid uses in food and drink are legal. The U.S. Food and Drug Administration also allows it in processed cheeses and other dairy products to adjust their pH levels. Watch for these other names for phosphoric acid on ingredient labels:


orthophosphoric acid

phosphoric(V) acid

pyrophosphoric acid

triphosphoic acid

hydrogen phosphate

While there are many common phosphoric acid uses, scientific research confirms that ingestion of this acid may have a number of possible health repercussions.

Phosphoric acid state

Types of phosphoric acid: Phosphoric acid (fos-FOR-ik AS-id) melts at a temperature just above room temperature (about 20°C; 68°F), so would be expected to occur as a solid under those conditions. As a solid, the acid is a white crystalline material with a strong tendency to absorb moisture from the air. In fact, phosphoric acid may also occur as a supercooled liquid at room temperature. A supercooled liquid is one that remains in a liquid state at temperatures below its freezing point, at which temperature it would be expected to be a solid. As a liquid, phosphoric acid is a colorless, odorless, syrupy liquid whose character is sometimes described as sparkling.

Influence of pH-control in phosphoric acid treatment of titanium oxide and their powder properties

Calculation of phosphoric acid PH on the skin: Titanium oxide that has the photocatalytic activity is used as a white pigment for cosmetics. A certain degree of sebum on the skin is decomposed by the ultraviolet radiation in sunlight. In this work, titanium oxide was shaken with phosphoric acid at various pH to synthesize a novel white pigment for cosmetics. Their chemical composition, powder properties, photocatalytic activity, color phase, and smoothness were studied. The obtained materials indicated XRD peaks of titanium oxide, however, these peak intensity became weak by phosphoric acid treatment. These samples without heating and heated at 100 °C included the small particles with sub-micrometer size. The photocatalytic activity of the obtained powders became weak by phosphoric acid treatment at pH 4 and 5 to protect the sebum on the skin.

Phosphoric Acid and wet process

Phosphoric acid (H3PO4, also known as orthophosphoric acid or phosphoric (V) acid) is a mineral inorganic acid. Orthophosphoric acid refers to phosphoric acid in which the prefix ortho is used to distinguish the acid from related phosphoric acids, called polyphosphoric acids. Orthophosphoric acid, when pure, is a solid at room temperature and pressure. The most common source of phosphoric acid is an 85% aqueous solution that is colorless and nonvolatile but is sufficiently acidic to be corrosive. Because of the high percentage of phosphoric acid in this reagent, at least some of the orthophosphoric acid is condensed into polyphosphoric acids. For the sake of labeling and simplicity, the 85% represents the acid as if it was all orthophosphoric acid. Dilute aqueous solutions of phosphoric acid exist in the orthoform. Phosphoric acid (H3PO4) can be manufactured using either a thermal or a wet process. However, the majority of phosphoric acid is produced using the wet-process method. Wet-process phosphoric acid is used for fertilizer production. Thermal process phosphoric acid is commonly used in the manufacture of high-grade chemicals, which require a much higher purity. The production of wet-process phosphoric acid generates a considerable quantity of acidic cooling water with high concentrations of phosphorus and fluoride. This excess water is collected in cooling ponds that are used to temporarily store excess precipitation for subsequent evaporation and to allow recirculation of the process water to the plant for reuse.

Health Hazards Associated with Phosphoric Acid

Phosphoric acid can be very hazardous in the case of skin contact, eye contact, and ingestion. It can also cause irritation if vapors are inhaled. This chemical can cause damage to the skin, eyes, mouth, and respiratory tract. Because of the potential hazards posed by this chemical, it is important to use care when handling it.
Repeated or prolonged exposure to phosphoric acid mist can lead to chronic eye irritation, severe skin irritation, or prolonged respiratory tract issues.

Phosphoric Acid Safety & First Aid

When handing phosphoric acid, use a certified vapor respirator. Eye-wash stations and safety showers should be located near work stations as a precaution. A face shield, gloves and boots should also be used. In case of accidental exposure to phosphoric acid, follow these first aid guidelines:

Inhalation—Seek fresh air and immediate medical attention.

Eye Contact—Remove contact lenses if present. Immediately flush eyes with plenty of water for at least 15 minutes, and get medical attention.

Skin Contact—Wash skin with soap and water. Cover any irritated skin with an emollient. Seek medical attention.

Ingestion—Do NOT induce vomiting. Never give anything by mouth to an unconscious person.

Safe Storage & Disposal of Phosphoric Acid

Store phosphoric acid in a cool, well-ventilated area protected from moisture. Keep away from incompatible substances such as oxidizing agents, metals, combustible materials. This chemical should be stored in a metallic or coated fiberboard container using a strong polyethylene inner package. Dispose of this chemical in accordance with federal, state, and local environmental control regulations.

Phosphoric acid, with various grades and various applications

phosphoric acid is a white solid .In aqueous solution, the acid behaves as a triprotic acid, having three ionizable hydrogen atoms. The hydrogen ions are lost sequentially. It is a stronger acid than acetic acid, but weaker than sulfuric acid and hydrochloric acid. the ion H2PO4 is a very weak acid, and HPO4 2 is an extremely weak acid.

The difference between organic phosphorus and inorganic phosphorus

The most obvious difference between organic phosphorus and inorganic phosphorus

• This type of phosphorus is naturally present in food.

• Organic phosphorus is found in both animal and plant foods.

• When you eat organic phosphorus, only 40%-60% of the phosphorus is absorbed.

• This type of phosphorus is not found on the food label.

 Inorganic Phosphorus (Hidden or Added Phosphorus)

• This type of phosphorus is added to foods during processing for a specific purpose such as improving color, flavor, or stability.

• Common foods that have inorganic phosphorus are many processed, convenience, and fast foods.

• More than 90% of inorganic phosphorus may be absorbed after eating.

• Binders can help decrease the amount of phosphorus absorbed.

• This type of phosphorus is listed on food labels, under the ingredients section.

Phosphoric acid in metallurgy 

Chemical conversion coatings are applied to steel and aluminum surfaces to protect against corrosion. Phosphate solutions containing phosphoric acid with special active additives are used to protect steel vehicles, office furniture, aircraft, ships and commercial and military machinery. Phosphate conversion coatings are widely used to provide good protection against corrosion of steel sheets, especially in the automotive industry. Phosphoric acid is used in metallurgical applications to supplement the treatment of steel sheets used for the body of steel cars and steel machinery. 

The phosphate layer consists of several crystals of different sizes, which indicates the existence of empty space between these crystals. Phosphoric acid is used to remove rust from corroded surfaces. Black phosphate coating improves their corrosion resistance. Phosphoric acid solutions are used to clean equipment and machinery in industrial plants, for example, dairies. Fuel cells work to produce electricity with phosphoric acid as a liquid electrolyte. 

اسید فسفریک

Foods With Phosphoric Acid

Phosphoric acid, a common food additive, has been associated with decreased bone mineral density. A colorless, odorless substance, it is used in fertilizers and detergents as well as foods and beverages. Its purpose in the food industry is to give a sharp flavor to food or to serve as a preservative.

Soft Drinks

The most widely consumed source of phosphoric acid is soft drinks. Phosphoric acid is responsible for the characteristic biting taste associated with colas. Clear sodas contain citric acid instead of the phosphoric acid found in colas. In addition to colas, many sports drinks, bottled teas, punches and fruit-flavored beverages contain phosphoric acid.

Dairy Products

The salts of phosphoric acid are used in many dairy products to modify the proteins and alter the pH to produce a higher-quality product. The addition of phosphates derived from phosphoric acid to cheese results in smooth, shelf-stable products. Phosphoric acid or phosphates can also be found in milk, buttermilk.

Phosphoric acid in fabric softeners

Fabric and water softeners often contain phosphoric acid. Phosphoric acid removes calcium and magnesium ions from the water to prevent ions from sticking to the fabric.

Phosphoric acid esters, which are anionic antistatic agents, are used in conventional cation fabric softeners to add to the rinsing cycle of home automatic washing machines or for the final wash in the industrial fabric purification process. The use of these esters significantly reduces the static accumulation of synthetic fabrics, especially nylon, with cotton and increases softening. The compounds are preferably in the form of aqueous solutions, dispersions or emulsions.

Baking Soda

Phosphoric acid salts are combined with baking soda to produce baking powder, a leavening agent found in many baked goods. Baked goods that are leavened with baking powder instead of yeast will likely contain phosphates; these will be in the ingredient list on the food package.

Use of phosphoric acid in water treatment

For years, researchers have developed a variety of products for use in water treatment.

Phosphoric acid is used to treat groundwater that is exposed to iron and manganese. These waters are known as "red water" (from iron) and "black water" (from manganese). When iron and manganese are exposed to oxygen, they oxidize water and change color. This causes rust stains from iron or blackish brown manganese stains that can be seen around bathtub tubes or laundry.

Phosphoric acid is used to prevent this condition, which significantly reduces the presence of iron and manganese in drinking water.

Phosphoric acid in mouthwash

Phosphoric acid can be used to adjust the pH. In fluoride mouthwash products, it is used in combination with sodium or disodium phosphate to help maintain the pH or acidity of the product. When phosphoric acid is combined with fluoride and disodium phosphate, the fluoride solution forms acidic phosphate, which restores the material and prevents the enamel from dissolving.

Processed Foods

Other processed foods that may contain phosphoric acid include breakfast or cereal bars, flavored waters, bottled coffee beverages and processed meats. Many fresh meat and poultry products are enhanced with salt solutions to increase their moisture and flavor. These solutions also contain phosphoric acid or phosphate salts. Read ingredient lists on food packages to identify phosphorus-containing food additives, such as dicalcium phosphate, hexametaphosphate, sodium phosphate and tricalcium phosphate.

What are the side effects of phosphoric acid?

Ingestion: Can burn the lips, tongue, throat and stomach. Symptoms may include nausea, vomiting, stomach cramps and diarrhea. Permanent damage can result. Effects of Long-Term (Chronic) Exposure: At low concentrations: Can cause dry, red, cracked skin (dermatitis) following skin contact.

Phosphoric acid 85%

Is a multi-function agent, used for plant nutrition, pH adjustment and cleansing irrigation equipment (notably dripper lines) from lime precipitates. Phosphoric acid is an efficient source of phosphorus for plants. Phosphoric acid is suitable for Nutrigation of greenhouse crops, open field crops and fruit trees.

Phosphoric Acid Fuel Cells (PAFC)

Phosphoric Acid Fuel Cells were the first fuel cells to become commercially viable. According to the U.S. Dept of Energy, more than 270 phosphoric acid fuel cells were deployed in stationary applications in both the United States and abroad. PAFCs were first produced in the 1960s for utilization on the space shuttle.

Advantages of Phosphoric Acid

Consists of 100% plant nutrients

Free of chloride, sodium and other detrimental elements for plants

Free of insoluble matter

Ideal for the production of nutrient solutions

Is phosphoric acid harmful?

It’s actually more common to have too much phosphorus than not enough. Phosphorus is found naturally in many foods and phosphoric acid is used as an additive, so most people get enough in their diet.

Your body needs phosphorus, but too much of it can cause problems. excessive phosphorus intake can put you at risk for osteoporosis and heart disease. Calcium and phosphorus work together to form and maintain healthy teeth and bones. The minerals need to be balanced in order to be effective.

Too much phosphorus can decrease the amount of calcium in your body, leading to bone loss. It can also impair your body’s ability to use other minerals, such as iron, zinc, and magnesium.

Phosphoric acid is dangerous if you come into contact with it as a chemical substance. The toxic fumes can irritate your skin, eyes, and respiratory system

Why do food and beverage manufacturers even use this chemical at all?

They use it to give their processed products a sharper, tangier flavor. Plus, it also acts as a preservative.There are many common phosphoric acid uses. This compound can be found in cola beverages, bottled and canned iced teas, bottled and canned coffee beverages, breakfast cereal bars, nondairy creamers, as well as enhanced chicken and meat products.

Will phosphoric acid damage paint?

Phosphoric acid (like concrete etcher) won't affect the paint. Neutralize it with water, dry it off, and then wipe with wax/grease remover before applying a top coat.

What does phosphoric acid do to aluminum?

In order to create a surface coating that will allow for proper paint adhesion, simply using phosphoric acid on aluminum will not do. Since there is an invisible thin covering of aluminum oxide over the surface, the metal remains inert to corrosion from the atmosphere.

What is the role of phosphoric acid in aspirin synthesis?

Role of phosphoric acid in the synthesis of aspirin. Phosphoric acid serves as a catalyst to help speed up a reaction. Phosphoric acid donates H+ protons to other atoms around it, making it a protonation; therefore, as a catalyst, it transfers protons.

Why is Persianutab phosphoric acid the best?

Phosphoric acid is 85% liquid. 85% by weight is phosphoric acid and 15% by weight is water. Used in the manufacture of fertilizers and detergents and in food processing. Food quality 85% phosphoric acid is commonly used to control and regulate the pH of a variety of foods and beverages. This chemical is on the surface of food and should not be misinterpreted as a dangerous acid. A concentrated solution that can be diluted up to 25% for use in the analysis of sulfur dioxide using the aspiration method. Persian YouTube Company is a specialized company in the field of importing food and beverage products. Phosphoric acid 85% Persian YouTube is one of the best and highest quality examples of this acid. You can use this acid safely in your food products. This material has safety and health standards. To buy and know the price of this product, contact Persian YouTube experts and buy it from this company with 85% assurance of phosphoric acid quality.

Sales of phosphoric acid

Persian YouTube Company, active in the field of selling industrial and laboratory chemicals, is ready to provide services in the field of selling phosphoric acid with reasonable prices and excellent quality and in desired quantities to customers. For information on the Sales and prices of phosphoric acid product, you can contact the company's experts.

Purchase and price of phosphoric acid

Purchase and price of phosphoric acid in a variety of ways, you can buy it from local stores for convenience. However, you can buy phosphoric acid online from online stores. Be careful when buying phosphoric acid for what you want to do. Phosphoric acid has different uses, and in the following, we will acquaint you with its various applications for the convenience of buying phosphoric acid. We respect the needs of our customers and offer high quality products. Phosphoric acid of Persian YouTube company has high quality and reasonable price. For detailed information on product prices, please contact the company's sales department.

Phosphoric acid is a weak acid.

Phosphoric acid is partially decomposed in aqueous solution to produce small concentrations of hydrogen ions. Therefore, phosphoric acid is a weak acid. In other words, it is not a strong acid.

How can phosphoric acid be neutralized?

To neutralize phosphoric acid, just add an alkaline solution (soda and ammonia) regardless of strong or weak weather conditions. On the other hand, dissolve a base chemical in phosphoric acid such as magnesium oxide.

Does baking soda neutralize phosphoric acid?

Baking soda (sodium bicarbonate) is not very soluble in water. It is first rinsed with cold water to remove most of the acid, a solution containing a little baking soda is enough to neutralize the residual phosphoric acid.

Does phosphoric acid damage concrete?

The most common acids used to clean concrete and brick are hydrochloric acid and phosphoric acid. If the stain is deeper than the concrete surface, acid mashing will not remove it. It also does not remove previous coatings, oil deposits and other water-insoluble materials.

Is Phosphorus In Phosphoric Acid Harmful To The Kidneys? 

Too much phosphorus can be a problem for people whose kidneys are already damaged. Because in these sick people, the body tends to retain phosphorus, which causes the amount of phosphorus in the kidneys to increase. By accelerating the passage of more phosphate through the kidneys, it accelerates the microcalcification of the renal tubules. This can impair kidney function and also increase the risk of fatal heart attacks. 

Natural phosphate in plants is absorbed less than phosphate in animal protein, and added phosphate in food processing is absorbed much better and faster than phosphate in the natural state. 

Food labels can show people with kidney problems how much phosphorus they have. Because limiting phosphorus is very important for these people. 

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