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Phosphoric acid
Phosphoric acid, a common inorganic acid, is a clear, colorless, viscous solution with no odor. Unlike volatile substances, it doesn’t quickly decompose and shows minimal signs of oxidation. While its acidity is milder than hydrochloric acid, sulfuric acid, and nitric acid, it is more potent than acetic acid, boric acid, and similar compounds. Phosphoric acid readily dissolves in air and is miscible with water and ethanol.
| Product Name: | Phosphoric acid |
|---|---|
| CAS No.: | 7664-38-2 |
| Purity | 85% |
| Packing: | 300kg/drum |
| HScode: | 2809201900 |
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Description:
Preparation Method:
The process begins by vaporizing yellow phosphorus, followed by its oxidation through either air or superheated water vapor. This oxidation leads to the formation of phosphorus pentoxide, which is subsequently absorbed and purified using water. Another approach involves the use of nitric acid to oxidize phosphorus. Alternatively, tricalcium phosphate can be co-heated with dilute sulfuric acid, followed by filtration of the resulting filtrate and subsequent concentration to obtain the desired product.
Synonyms:
Phosphoric acid;Orthophosphoric acid;EVITs;WC-Reiniger;Sonac;Decon 4512;Kefo;3M Etching Liquid;C 134 (acid);C 434 (acid);C 134;C 434;Mikro Klene DF;K-etchant;SPA 2 (catalyst);SPA 2;TG 434;Ultra-Etch Gel;Uni-Etch;Ultraetch;Amberphos 54;HQ 54;Panavia Etching Agent;Conditioner 36;E 338;Total Etch;NSC 80804;Etchalite;Kerr Etchant;Y 11A06;Ultradent;K Etchant Gel;Acidum phosphoricum;Vococid;PC 400;SF 1;SF 1 (acid);28602-75-7;178560-73-1;959699-83-3;1021417-41-3;1053657-23-0;1196963-54-8;1643589-98-3;2055242-58-3
Characteristics:
| Molecular Formula | H3PO4 |
| Molar Mass | 97.99 |
| Density | 1.685 |
| Melting Point | 21℃ |
| Boling Point | 158℃ |
| Water Solubility | MISCIBLE |
| Vapor Presure | Vapour pressure, Pa at 25°C: |
| Vapor Density | 3.4 (vs air) |
| Appearance | Transparent liquid |
| Color | Unstable orthorhombic crystals or clear syrupy liquid|Colorless, sparkling liquid or transparent, crystalline solid, depending on concentration and temperature. |
| Odor | Odorless |
| PH | pH = 1.5 (0.1 N aqueous solution) |
| Storage Condition | Storage Room low temperature ventilation drying ,Separate storage with H Pore forming agent、caustic soda |
| Physical and Chemical Properties | appearance and properties: colorless transparent or slightly light color thick liquid, pure phosphoric acid for colorless crystals, odorless, with a sour taste. melting point (℃): 42.35 (pure) boiling point (℃): 261relative density 1.70 relative density (water = 1): 1.87 (pure) relative vapor density (Air = 1): 3.38 saturated vapor pressure (kPa): 0.67(25 ℃, pure) solubility: miscible with water, miscible with ethanol. |
| PSA | 87.57 |
| XLogP3 | 0.9286 |
| Toxicity | ADI 0 to 70 mg / kg (total phosphate content in terms of phosphorus, FAO / WHO, 2001). GRAS (FDA, § 182.1073, 2000). LD501530mg / kg (rat, oral). In case of daily intake of 2 ~ 4 g, it can cause mild diarrhea. The amount of sour agent used as a cola drink is 0.02% to 0.06%. |
| Flammability characteristics | Noncombustible Solid |
Use
Agriculture: Phosphoric acid is a vital raw material for producing essential phosphate fertilizers, including superphosphate and potassium dihydrogen phosphate. Additionally, it plays a crucial role in creating feed nutrients, such as calcium dihydrogen phosphate.
Industry: Phosphoric acid is important as a chemical raw material in various industrial applications. Its primary functions are as follows:
Surface Treatment: It forms an insoluble phosphate film on metal surfaces, effectively safeguarding them against corrosion.
Chemical Polishing: When combined with nitric acid, it serves as a chemical polish, enhancing the finishing quality of metal surfaces.
Production of Cleaning Products: Phosphoric acid is utilized as a raw material in washing supplies and as a pesticide precursor, specifically for phosphate esters.
Flame Retardant Materials: It is crucial in producing flame retardant materials containing phosphorus.
Food: Phosphoric acid finds application as a food additive, primarily serving as a sour agent and providing yeast nutrition. Notably, it is present in cola beverages. Additionally, phosphate, another essential food additive, can be a nutrient enhancer.
Medicine: Phosphoric acid is utilized to produce phosphorus-containing medications, including sodium glycerophosphate, a notable example.
FAQ:
Q1. What is the nature of phosphoric acid?
A1. Phosphoric acid is a remarkable liquid known for its colorless and odorless properties. It forms crystals and serves various industries, including chemical manufacturing, agriculture, and food processing. With the chemical formula H3PO4, it stands as a potent inorganic acid.
Q2. What are the practical uses of phosphoric acid?
A2. Phosphoric acid boasts a wide range of applications that make it highly versatile. It is vital in producing mono ammonium phosphate (MAP) and diammonium phosphate (DAP) fertilizers. Additionally, it finds its way into the food and beverage industry, functioning as a food additive and pH adjuster. Moreover, phosphoric acid contributes to metal treatment, detergent production, water treatment, and pharmaceutical manufacturing.
Q3. What are the available grades of phosphoric acid?
A3. Depending on the intended purpose, phosphoric acid is available in different grades. The commonly found grades include technical, food, and electronic. Technical-grade phosphoric acid primarily caters to industrial applications, while food-grade phosphoric acid adheres to strict purity standards for its utilization in the food and beverage sector. Furthermore, electronic-grade phosphoric acid attains even higher purity and serves the semiconductor industry.
Q4. Could you provide the specifications and properties of phosphoric acid?
A4. Phosphoric acid typically exhibits a concentration ranging from 75% to 85% for industrial applications, while food-grade phosphoric acid boasts a concentration of 85% or higher. This highly corrosive liquid demands careful handling. It possesses a high boiling point and readily mixes with water.
Q5. How is phosphoric acid packaged?
A5. Phosphoric acid is commonly available in bulk quantities, such as tankers or intermediate bulk containers (IBCs). Depending on specific requirements, it can also be supplied in drums, carboys, or smaller containers to cater to customers’ needs.
Q6. What safety precautions should one take while handling phosphoric acid?
A6. Handling phosphoric acid necessitates utmost caution due to its rugged nature, which can cause severe burns or eye damage if mishandled. Adequate personal protective equipment (PPE), such as gloves, goggles, and a lab coat, must be worn while working with phosphoric acid. Proper ventilation is crucial in the working area to avoid inhaling vapors. Storage should be in a cool, dry place, far from incompatible substances.
Q7. How should phosphoric acid be stored?
A7. For safe storage, phosphoric acid should be kept in a dedicated area away from ignition sources, heat, and direct sunlight. The storage area must have adequate ventilation and be secure. Containers should be tightly sealed to prevent leakage or evaporation. It is advisable to store phosphoric acid separately from other chemicals to avoid potential reactions.
Q8. How can I place an order for phosphoric acid?
A8. Placing an order for phosphoric acid is a simple process. As an inaugural step, it is requisite that you ascertain your possession of the requisite qualifications and conditions enabling the acquisition of chemicals of a hazardous nature. Don’t hesitate to contact our sales team using the provided contact details on our website. Our dedicated sales representatives will assist you with product information, pricing details, and logistics. When submitting your order, kindly specify the required quantity, grade, and any specific packaging preferences.
Q9. Do you offer technical support or documentation for phosphoric acid?
A9. Certainly! We take pride in providing our esteemed customers with comprehensive technical support and documentation. Our experienced team can readily assist you with product specifications, usage guidelines, and phosphoric acid safety data sheets (SDS). Feel free to contact us for any technical inquiries or further assistance.
Q10. What is the lead time for phosphoric acid orders?
A10. The lead time for phosphoric acid orders may vary depending on quantity, grade, and availability. Our sales team will provide an estimated lead time when you place your order. Rest assured; we strive to fulfill orders promptly and efficiently to meet the specific requirements of our valued customers.
Note: This FAQ is intended for general informational purposes only and should not be considered professional advice. It is crucial to consult a qualified expert or follow the specific recommendations provided by the manufacturer when handling or using phosphoric acid.
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