Shaanxi BLOOM Tech Co., Ltd. is one of the most experienced manufacturers and suppliers of h3po4 phosphoric acid cas 7664-38-2 in China. Welcome to wholesale bulk high quality h3po4 phosphoric acid cas 7664-38-2 for sale here from our factory. Good service and reasonable price are available.
H3po4 phosphoric acid, CAS 7664-38-2, the molecular formula H ∝ PO ₄ is a colorless and transparent solid crystal at room temperature, with a melting point of 42 ° C. When the temperature exceeds the melting point, it becomes a colorless and transparent viscous liquid. In industry and laboratories, phosphoric acid often exists in the form of an 85% aqueous solution, which is a colorless, odorless, non-volatile viscous liquid and an important chemical reagent. A medium strength ternary acid, phosphoric acid can gradually release three protons, forming three different protonated forms: H ₂ PO ₄⁻, HPO ₄² ⁻, and PO ₄³ ⁻. This characteristic gives it significant diversity in chemical reactions.
Phosphoric acid has a wide range of applications in industry and is an important raw material for the production of fertilizers, detergents, and food additives. In addition, phosphate plays a crucial role in nature and organisms, particularly in cellular energy conversion (such as ATP production and utilization) and bone formation. In addition, the buffering properties of phosphate make it an indispensable substance in laboratory research and drug preparation, widely used to maintain the pH stability of solutions. This characteristic provides important support for scientific research and medical applications.
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CF |
H3O4P |
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EM |
97.98 |
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MW |
97.99 |
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m/z |
97.98 (100.0%) |
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Elemental Analysis |
H, 3.09; O, 65.31; P, 31.61 |
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Morphological |
Solid or Viscous Liquid |
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Color |
Clear |
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Phosphoric acid is a ternary medium strong acid, which is ionized in three steps. It is not easy to volatilize and decompose, and has certain oxidizability. It has the generality of acid.
(1) Concentrated phosphoric acid can be co heated with sodium chloride to generate hydrogen chloride gas (with similar reaction with potassium iodide, sodium bromide, etc.), which belongs to the preparation of low boiling acid from high boiling acid. Principle: preparation of volatile acid from difficult volatile acid
(2) Phosphate ions have strong coordination ability and 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 in analytical chemistry to mask fe3+ ions. Concentrated phosphoric acid can dissolve tungsten, zirconium, silicon, iron silicide, etc., and form complexes with them.
(3) When phosphoric acid is dehydrated under strong heat, polyphosphate, pyrophosphoric acid, triphosphate and polymetaphosphoric acid are produced in turn. Triphosphate is a chain structure, and polyphosphate is a ring structure.
(4) H3po4 phosphoric acid should be noted that concentrated hot phosphoric acid can corrode silicon dioxide and generate heteropoly acids. Concentrated hot phosphoric acid can also decompose most minerals, such as chromite, rutile, ilmenite, etc.
we focus on the technology of Organic Synthesis since 2008, We can develop high-quality products, completely dependent on our exquisite R & D team. According to the statistics of Baifu data, in the first quarter of 2022, the market demand for phosphoric acid continued to increase. At present, the production capacity of the plant is about 17 tons per month, so there is enough productivity to supply the current market demand.
In addition to our company's sufficient productivity, we also have sufficient qualifications to provide to buyers for review. The businesses in the following figure have cooperated with us. We have won orders from each other with our professional knowledge and high-quality services.
Phosphoric acid (H3PO4), as an important inorganic acid, plays a key role in more than ten fields such as industry, agriculture, food, medicine, and new energy due to its acidity, buffering, chelating properties, and phosphorus source characteristics. Starting from the core application areas, the following systematically outlines their diversified uses and technical principles.
Phosphoric acid is the core raw material of the phosphate fertilizer industry, and about 80% of the world's phosphoric acid is used for agricultural production. It significantly promotes crop growth and increases yield by providing essential phosphorus elements (one of the three major nutrients of nitrogen, phosphorus, and potassium) to plants.
1. Phosphate fertilizer production
Calcium superphosphate: produced by reacting phosphoric acid with phosphate rock (mainly composed of calcium phosphate), containing 16% -20% available phosphorus (P2O5), widely used as base fertilizer and topdressing.
Diammonium phosphate (DAP): With a phosphorus content of 46%, it provides dual nutrition of nitrogen and phosphorus, and is suitable for crops such as corn and wheat. It can improve root development and stress resistance.
Potassium dihydrogen phosphate: a high concentration phosphate potassium compound fertilizer that can be quickly replenished with nutrients by foliar spraying, enhancing crop drought and cold resistance.
2. Feed Nutrients
Calcium dihydrogen phosphate: As a feed additive, H3po4 phosphoric acid provides phosphorus and calcium for livestock and poultry, promotes bone development and eggshell formation. For example, adding calcium dihydrogen phosphate to the feed of laying hens can increase egg production by 5% -8%.
Calcium hydrogen phosphate: used in ruminant animal feed to regulate rumen pH and improve feed utilization efficiency.
3. Technical Principle
Phosphorus is a key component of plant DNA, ATP (energy carrier), and cell membrane phospholipids. Phosphoric acid increases the availability of phosphorus by dissolving insoluble phosphorus compounds in soil, such as iron phosphate and aluminum phosphate, while inhibiting soil fixation of phosphorus and improving fertilizer utilization efficiency.
Phosphoric acid has the functions of seasoning, preservation, and nutritional enhancement in food, and its application must comply with GB 2760-2014 "National Food Safety Standard for the Use of Food Additives".
1. Acidulant
Carbonated beverages: Phosphoric acid gives cola and other beverages a refreshing sour taste, and adjusts the pH to 2.5-3.5 to inhibit microbial growth. For example, the phosphoric acid content in Coca Cola is about 0.05% -0.1%.
Jam and seasoning: compounded with citric acid to enhance the layered sour taste and extend shelf life.
2. Food processing aids
Meat water retention: Phosphates (such as sodium tripolyphosphate) chelate metal ions and improve the water holding capacity of muscle proteins, increasing the yield of processed meat products such as ham and sausage by 10% -15%.
Cheese production: As a coagulant, it promotes the coagulation of whey protein and improves the texture of cheese.
Nutritional reinforcement
Flour improvement: Phosphates can enhance dough strength, increase bread volume and softness.
Dairy products: as a source of yeast nutrition, promote fermentation and prevent contamination by miscellaneous bacteria.
technical advantage
The pKa values of phosphoric acid (2.12, 7.21, 12.67) enable it to exert buffering effects over a wide pH range and stabilize food systems. For example, in the process of beer saccharification, phosphoric acid can replace lactic acid to adjust the pH value and avoid odor generation.
The strong acidity and chelating properties of phosphoric acid make it a key raw material for metal surface treatment, detergent production, and chemical synthesis.
1. Metal surface treatment
Phosphating treatment: H3po4 phosphoric acid reacts with zinc and manganese salts to form a phosphate film, which covers the metal surfaces of automobiles and machinery, preventing rust and improving coating adhesion. For example, the salt spray resistance test time of the phosphating coating on the car body can be extended to over 1000 hours.
Chemical polishing: A mixture of phosphoric acid and nitric acid (ratio 3:1) is used for polishing aluminum products. By dissolving the protruding parts on the metal surface, the smoothness is improved, and the surface roughness Ra can be reduced to below 0.1 μ m.
2. Detergent production
Detergents: Modified phosphates (such as layered sodium disilicate) replace traditional sodium tripolyphosphate, softening water quality and preventing the re deposition of dirt, while reducing the risk of eutrophication in water bodies.
Industrial cleaning agent: a combination of phosphoric acid and surfactants, used to remove oil stains from metal equipment, with a cleaning efficiency that is 30% higher than that of a single surfactant.
3. Chemical raw materials
Phosphate synthesis: produces ammonium phosphate, disodium hydrogen phosphate, etc., used for water treatment (scale inhibitor), food additives, and pharmaceutical intermediates.
Flame retardant: Organophosphorus compounds (such as triphenyl phosphate) are used in plastics and textiles to inhibit combustion by promoting the formation of a carbon layer, and the oxygen index (LOI) can be increased to over 30%.
4. Technical challenge
Traditional phosphating processes contain heavy metals such as zinc and manganese, and require the development of chromium free phosphating solutions to meet environmental requirements. For example, titanium based phosphating solution has been applied in the aerospace field by catalyzing the formation of a film through titanium ions.
Pharmaceutical field: drug synthesis and formulation excipients
Phosphoric acid has both therapeutic and formulation functions in medicine, and its application must comply with the standards of the Chinese Pharmacopoeia.
1. Drug Synthesis
Antiviral drugs: Oseltamivir phosphate inhibits neuraminidase activity, blocks influenza virus release, and has a clinical cure rate of 80% -90%.
Iron supplement: Sodium iron phosphate is used for the treatment of iron deficiency anemia, and its bioavailability is 20% higher than that of ferrous sulfate.
2. Pharmaceutical adjunct
PH regulator: Phosphate buffer solution (such as PBS) maintains drug stability, for example, the pH of insulin injection should be controlled at 7.0-7.8 to prevent degradation.
Disintegrating agent: Calcium hydrogen phosphate promotes rapid disintegration of the drug in tablets, with a dissolution rate that meets USP standards.
3. Oral care
Phosphate toothpaste: removes dental plaque through chemical adsorption, but excessive use (concentration>5%) may erode enamel, and the dosage needs to be controlled.
New Energy Sector: Lithium Battery and Semiconductor Manufacturing
Derivatives of phosphoric acid show great potential in clean energy and high-end manufacturing.
1. Lithium battery positive electrode material
Lithium iron phosphate (LiFePO4): As the mainstream positive electrode material for power batteries, its theoretical specific capacity is 170mAh/g, and its cycle life is over 2000 times, with better safety than ternary materials. By 2024, the global production of lithium iron phosphate will account for over 60%, mainly used for new energy vehicles and energy storage systems.
2. Semiconductor cleaning
High purity phosphoric acid: Electronic grade phosphoric acid (purity ≥ 99.999%) is used in etching and cleaning processes in chip manufacturing, which can remove metal impurities (such as Fe, Cu) to ppb level and reduce chip defect rate.
3. Technological breakthrough
Lithium manganese iron phosphate (LMFP): By doping manganese, the voltage plateau is increased to 3.8V, and the energy density is 15% -20% higher than that of lithium iron phosphate, making it a candidate material for the next generation of power batteries.
Environmental Protection and Emerging Fields: Wastewater Treatment and Building Reinforcement
The application of phosphoric acid in the fields of environmental protection and construction is gradually expanding.
wastewater treatment
Heavy metal removal: Phosphate forms insoluble precipitates with lead and cadmium ions, and the concentration of heavy metals in the treated wastewater can be reduced to below 0.1mg/L, in compliance with the GB 8978-1996 discharge standard.
Phosphorus recovery: Recovering phosphate from wastewater to prepare slow-release fertilizers, achieving resource recycling.
Construction industry
Concrete retarder: H3po4 phosphoric acid delays cement hydration reaction, prolongs construction time, and is suitable for concrete pouring in high temperature environments.
Refractory material: Aluminum phosphate binder improves the strength and thermal shock resistance of refractory bricks, with a service temperature of up to 1600 ℃.
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