Phosphoric acid for sale, also known as orthophosphoric acid is a kind of inorganic acid in transparent or colorless solid liquid. It is easily deliquesced in air, when it is heated, it will lose water to become pyrophosphoric acid, and then further lose water to become metaphosphoric acid. Phosphoric acid is mainly used in pharmaceutical, food, fertilizer and other industries, such as, as rustproofing agent, food additive, dental and orthopedic etchant, electrolyte, flux, dispersant, raw materials of fertilizer and household cleaning products. It can also be used as a chemical reagent, for that phosphate is a nutrient for all life.
- Product Name: 85% Phosphoric Acid
- Appearance: colorless, transparent thick liquid
- Tech Grade: Food&Fertilizer Grade
- Main Uses: Sour agents, yeast nutrition, water retention agent, leavening agent, stabilizer, coagulant, anti-knot agent, etc…
- CAS NO.: 7664-38-2
- Molecular Formular: H3PO4
- HS Code: 28092010
|Item||Phosphoric Acid (Food Grade)|
|Test method||FCC IV or gb3149-92|
|Phosphoric acid content % ≥||85%|
|Arsenic(As) content % ≤||0.00005|
|Fluorine(F) content % ≤||0.001|
|Chloride content(CI) % ≤||0.0005|
|Heavy metal (Pb)content % ≤||0.0005|
|Easily oxidized substances(H3PO3) % ≤||0.012|
|Sulfate content % ≤||0.005|
|Packing||20L or 200L plastic barrel, net weight 35Kg or 330Kg, 1650kg IBC tank|
Features of Phosphoric Acid
It is odorless, can absorb moisture from air and is easily soluble in water and ethanol. When dissolved, it can give off a lot of heat. Phosphoric acid is non-toxic, corrosive and can corrode quartz. It is a nonvolatile acid without oxidation.Orthophosphoric acid is a phosphoric acid composed of single phosphorus-oxygen tetrahedron. In the phosphoric acid molecule, the P atom is sp3 hybridized, three hybrid orbitals form three sigma bonds with the oxygen atom, and the other P-O bond is composed of a sigma bond from phosphorus to oxygen and two from oxygen to phosphorus consists of d-pπ bonds. The σ-bonding bond is formed by the coordination of a pair of lone pairs of electrons on a phosphorus atom to an empty orbital of an oxygen atom. The d←p bond is formed by overlapping two pairs of lone pairs of electrons in the py and pz orbitals of the oxygen atom and the dxz and dyz orbits of the phosphorus atom. Since the 3d energy level of the phosphorus atom is much higher than the 2p energy level of the oxygen atom, the molecular orbital of the composition is not very effective, so the P-O bond is a triple bond in terms of number. But from the perspective of bond energy and bond length, it is between single and double bonds. There are hydrogen bonds in pure H3PO4 and its crystalline hydrates, which may be the reason why the concentrated phosphoric acid solution is thick.
It is a medium-strong acid with a crystallization point of 21℃. When it is below this temperature, hemihydrate crystals are precipitated. In general, it doesn’t form crystals at temperatures above 10℃ or even lower, because it has a supercooling property. Actually, commercially available phosphoric acid deviates from its crystallization point below 21℃ and won’t crystallize immediately. However, as long as such a low temperature is maintained for a while, it is liable to produce knot crystals in a static state.
Phosphate crystallization is physical property rather than chemical property, like other liquid crystallizes. Its chemical property won’t change due to crystallization. Meanwhile, the quality of phosphoric acid won’t affected by crystallization. As long as the temperature is raised to make it melt or adding hot water to make it dilute and melt, it can still be used normally.
Phosphoric acid is ternary medium-strong acid, which can be ionized in three steps. It is not easy to volatilize, not easy to decompose. It also has a certain degree of oxidation, as well as the general property of acid.
Concentrated phosphoric acid can co-heated with sodium chloride to generate hydrogen chloride gas. It is called high boiling acid made to boiling acid. The principle is to produce volatile acid from volatile acid.
Phosphate ions have strong coordination ability, which can form soluble complexes with many metal ions. For example, Fe3 + and PO43- can form colorless soluble complexes [Fe (PO4) 2] 3- and [Fe (HPO4) 2]-. Using this property, PO43- is commonly used to masking Fe3 + ions in analytical chemistry. Concentrated phosphoric acid can dissolve tungsten, zirconium, silicon, iron silicide and form complexes with them.
Phosphoric acid will dehydrate when subjected to intense, and can produce pyrophosphoric acid, triphosphoric acid and polyphosphoric acid. Triphosphate is a chain structure, and polymetaphosphate is a cyclic structure.
The concentrated hot phosphoric acid can corrode silicon dioxide and produce heteropoly acid. It can also decompose most minerals, such as, chromite, rutile, ilmenite, etc...
According to different uses, phosphoric acid can be divided into several types, such as, food grade, fertilizer grade and industrial grade orthophosphoric acid. With different concentration and purity, they have a wide range of uses in their respective fields. So please pay attention to choose the suitable type for you.
Food Grade Phosphoric Acid Uses
Food grade phosphoric acid is generally produced by thermal method with no impurities affecting food safety, which should be in accordance with food safety standards.
Phosphoric acid is one of the common food additives, which can be used as a sour agents, yeast nutrition, water retention agent, leavening agent, stabilizer, coagulant, anti-knot agent, etc...
- Used as flavouring agent.
- Used as sour agent in canned, liquid, solid drinks and cool drinks, which can replace citric acid and malic acid.
- In the process of beer saccharification, the phosphoric acid can be used to adjust the PH value instead of lactic acid.
- Used as clarifying agent for sucrose in the sugar industry.
- In brewing industry, it can be used as yeast nutrient to prevent the reproduction of miscellaneous bacteria.
- Used as improver in flour.
Phosphoric Acid Uses in Fertilizer
Phosphoric acid is an important raw material for the production of phosphate fertilizer, as well as the raw material for the production of feed nutrients. It can also be combined with other kinds of chemicals to from compound fertilizer. The main varieties of phosphate fertilizer are calcium superphosphate, triple calcium superphosphorate, manoammonium phosphate, diammonium phosphate and compound fertilizer. Phosphoric acid fertilizer is very useful for the growth of plants, fruits, vegetables, etc... The efficiency and speed of phosphate fertilizer depend on the content of phosphorus pentoxide, soil property, fertilization method and crop types.
Phosphoric Acid Uses in Industries
- Used for phosphating treatment of metal surface steel pipes.
- Preparation of electrolytic polishing liquid and chemical polishing liquid.
- Used for the polishing of aluminum products.
- Used in the manufacture of various phosphates.
- In pharmaceutical industry, it can be used in the manufacture of sodium glycerophosphate, iron phosphate, adjust the PH value when produce penicillin.
- Used to make zinc phosphate as an adhesive for dental fillings.
- In plastics industry, it can be used as a catalyst for condensation of phenolic resin.
- Desiccant for the production of dyes and intermediates.
- In printing industry, it is used to prepare cleaning agent to wipe off stains on offset printing plate.
- When producing matches, it can be used to impregnating match stubble to make the burned match stubble not ash into charcoal, which is much safer to use.
- In metallurgy industry, it is used to produce refractory mud and improve the life of steel furnace.
- In rubber industry, used for slurry coagulant and production of inorganic binder raw materials.
- In water treatment industry, it can be used as water stabilizer and scale inhibitor.
Production Process of Phosphoric Acid
Thermal MethodFirstly, the electric furnace is used to restore phosphorus furnace and the phosphorus in the ore is sublimated and then cooled and liquefied by dust removal. Then the liquid phosphorus is burned, hydrated and defogged to make phosphoric acid. The thermal phosphoric acid has high energy consumption, but it can get high purity phosphoric acid. The production of phosphoric acid includes combustion of phosphorus and hydration of anhydride. The main production method of producing phosphoric acid is now the two-stage method, which refers to the process of producing phosphoric acid by condensing the steam of phosphorus in the electric furnace into liquid phosphorus and then combustion water.
Wet-process MethodThis method uses inorganic acid to decompose phosphate rock powder, and form crude phosphoric acid after filtration and separation and orthophosphoric acid is obtained after concentration. Wet-process phosphoric acid has lower cost than thermal phosphoric. But the impurity content is high, which can only be used to produce agricultural grade phosphorus compound fertilizer. After proper purification, the purity can be comparable to that of thermal orthophosphoric acid. In addition, according to different inorganic acids used, the wet-process phosphoric acid can be divided into sulfuric acid, nitric acid and hydrochloric acid. When sulfuric acid reacts with phosphate rock, there are usually two kinds of products, one is phosphoric acid in liquid phase, the other is calcium phosphate crystal with small solubility, so the liquid-solid separation is easy to realized. The so-called wet-process phosphoric acid is produced by decomposing phosphate rock with sulfuric acid. At different reaction temperatures and phosphoric acid concentrations, calcium sulfate has three forms, anhydrous calcium sulfate, calcium sulfate hemihydrate, calcium sulfate dihydrate. So the production process of wet-process orthophosphoric acid can be further divided into an anhydrous method, a semi-aqueous method, a dihydrate method and a semi-water-dihydrate method. At present, most factories are using the dihydrate method to produce.
The Storage And Transportation of Phosphoric AcidIt needs to be packed in special polyethylene plastic bucket with inner and outer cover sealing the barrel mouth tightly. The package should be clearly marked with the product name, specification, net weight, as well as the symbol of corrosive materials. It should be stored in a cool and ventilated warehouse. In cold winter area, pay attention to the insulation of high concentration phosphoric acid to prevent icing and container rupture leakage. It is nor allowed to be stored and transported together with alkali, toxic substances and other corrosive substances. During transportation, keep out of the rain and hot sun. During loading and unloading, it is necessary to take it lightly and avoid violent impact to prevent package container from breaking. If there is a fire, use dry sand or dry powder fire extinguisher to save.
Risk AnalysisReact with melt, it will give off hydrogen, which can form explosive mixture with air. Decomposition by heat will produce highly toxic phosphorus oxide flue gas. Vapor or mist of phosphoric acid is irritating to eyes, nose and throat. Oral fluids can cause nausea, vomiting, abdominal pain, bloody stools or shock. It is harmful to the environment and can cause pollution to water.
How to Keep Safety When Using Phosphoric AcidDuring transportation, ensure that the container won’t leak, collapse, fall or damage. The transport vehicle should be equipped with leak emergency treatment equipment. Operators must be specially trained and strictly follow the operating procedures. Meanwhile, operators are advised to wear self-suction filter mask, chemical safety glasses, wear rubber acid-resistant clothing and gloves. When diluting or preparing solutions, be careful to add the phosphoric acid to the water slowly to prevent overheating and splashing. Sealed operation, pay attention to ventilation. Be equipped with safe shower and eye wash equipment.
Phosphoric Acid Manufacturer
Chemate technology Co., Ltd is a comprehensive company integrating production, research and development, sales and service based on phosphorus chemical industry. With the characteristics of professional production, innovational research, resource intensification and intelligent production equipment, the phosphorus chemicals we produced are with high quality and accurate proportion, which has been well received by our clients. Customers can rest assured to purchase phosphoric acid for sale from our company.
Phosphoric Acid Price
The raw material price of chemical industry fluctuates greatly, and there are varieties of products specifications and models. So if you have any need, please feel free to call us and send us email to get price quickly. We will reply you in 24 hours. And we can guarantee that the phosphoric acid for sale in our company is with competitive price.