Potassium Bisulfate CAS 7646-93-7
Factory wholesale Potassium Bisulfate CAS 7646-93-7
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- Purity:99.8%
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Name: Potassium Bisulfate
CAS: 7646-93-7
MOQ: 1KG
Directory Guidance on Potassium Bisulfate
Chemical Structure
Basic Info:
| Melting Point | 214 °C(lit.) |
| Boiling Point | Decomposes [STR93] |
| Bulk Density | 1140kg/m3 |
| Density | 2.32 g/mL at 25 °C(lit.) |
| Storage Temp. | Store at +5°C to +30°C. |
Potassium Bisulfate Introduction:
Potassium Bisulfate is an inorganic compound with the chemical formula KHSO₄. At room temperature, it usually exists in the form of colorless transparent crystals or white powder. As a strongly acidic salt, Potassium Bisulfate possesses unique physicochemical properties. In terms of crystal structure, it belongs to the monoclinic crystal system, and potassium ions and bisulfate ions in the lattice are combined through ionic bonds. This compound has good stability in a dry environment, but it will gradually decompose to form potassium pyrosulfate when the temperature exceeds 200℃, accompanied by the release of sulfur trioxide gas. This thermal decomposition property makes it have special applications in specific industrial fields, such as being used as an acid source in high-temperature treatment processes.
From the perspective of physical and chemical properties, the solubility of Potassium Bisulfate in water is significantly temperature-dependent. At 25℃, its solubility is 36.3g/100mL water. As the temperature rises to 100℃, the solubility can increase to 121g/100mL. This high solubility characteristic makes its operational flexibility in aqueous solution systems significantly better than that of other acidic salts. The solution is strongly acidic. The pH value of a 25% aqueous solution is approximately 1.3, which is comparable to the acid strength of concentrated sulfuric acid. It is worth noting that Potassium Bisulfate also has outstanding solubility in alcohol solvents, which demonstrates unique value in the application of organic reaction catalysts. In addition, the hygroscopicity of this compound is lower than that of similar sulfates, which provides convenient conditions for its storage and transportation.
In terms of safety of use, although Potassium Bisulfate is not flammable, its strong acidity has obvious corrosive effects on metal materials and biological tissues. Operators must strictly wear protective equipment when exposed to high-concentration solutions, and should be kept away from alkaline substances and reducing agents during storage. Special attention should be paid to ventilation conditions when used in confined spaces, because its decomposition will produce irritating gases. In industrial applications, pH online monitoring systems are often used to control reaction conditions in real time to effectively reduce potential risks. Although this compound is not listed as a major hazardous substance, its waste liquid treatment must follow the acidic wastewater specifications, and conventional neutralization treatment requires the consumption of a large amount of alkaline substances.
Nature and Specifications:
| Item | Specification |
| Product Name | Potassium Bisulfate |
| CAS No. | 7646-93-7 |
| Appearance | Powder |
| Shelf Life | 2 years |
| Packing | As Your Requirements |
| Form | Solid |
| Color | White |
| Specific Gravity | 2.322 |
| PH | 1 (50g/l, H2O, 20℃) |
Product service:
- Certificate Of Analysis (COA)
- Material Safety Data Sheet (MSDS)
- Route of synthesis (ROS)
- Method of Aanlysis (MOA)
- Nuclear Magnetic Resonance (NMR)
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- Factory audit
The Application Situation Of Potassium Bisulfate
Potassium Bisulfate is widely employed for surface treatment of metals. As an electroplating conductive salt, Potassium Bisulfate helps improve coating uniformity and bonding strength while providing greater controllability over metal dissolution than its traditional pickling counterpart. Furthermore, when applied as an etching process on special alloys such as titanium, its low volatility and good controllability of dissolution make for more precise processing quality of precision devices.
The chemical production field requires the largest amount of Potassium Bisulfate. In the synthetic resin industry, it can be used as an acidic regenerant for cation exchange resins, and its regeneration efficiency is approximately 15% higher than that of sulfuric acid. During the pigment manufacturing process, the Potassium Bisulfate solution can stabilize the pH value of the color paste system and prevent color differences caused by the hydrolysis of metal ions. The preparation of certain special greases requires it as a structural regulator, and its unique ionic properties contribute to the formation of a stable colloidal structure. In addition, in the petroleum refining process, the combination of catalysts containing Potassium Bisulfate can enhance cracking efficiency and reduce coking.
The demand for Potassium Bisulfate in the field of environmental protection has increased significantly in recent years. As a new type of wastewater treatment agent, it has shown a good effect in the removal of heavy metal ions. The bisulfate ions in the solution can form insoluble sulfate precipitates with various metal cations and at the same time have an oxidizing and decomposing effect on certain organic pollutants. Compared with traditional flocculants, this treatment method has the advantages of fast reaction speed and less sludge production. In the flue gas desulfurization system, the Potassium Bisulfate slurry can achieve a capture efficiency of over 98% for low-concentration sulfur dioxide. The by-products, after treatment, can be used as agricultural fertilizers, forming a resource recycling chain.
Potassium Bisulfate is used extensively within the pharmaceutical industry as an acidic catalyst, especially during organic synthesis reactions. Antibiotic synthesis processes often incorporate it to adjust pH values of reaction systems, further increasing purity and yield of products. Potassium Bisulfate can also be found used as disintegrants that rapidly decompose tablets upon coming in contact with water; such applications have stringent purity standards (USP/EP).
Although it is not a major market in agricultural applications, Potassium Bisulfate plays a significant role in the nutritional regulation of specific crops. When its aqueous solution is used for soil improvement, it can effectively regulate the pH value of alkaline soil and provide the potassium and sulfur elements needed by plants at the same time. Some foliar fertilizers of economic crops contain trace amounts of Potassium Bisulfate, which enhances the stress resistance of the crops by regulating the osmotic pressure of cells. In recent years, its usage proportion in soilless cultivation nutrient solution formulas has gradually increased, especially in hydroponic systems, where it can maintain an acidic solution environment and prevent the precipitation of nutrient elements.
The Advantages Of Potassium Bisulfate
Potassium Bisulfate liquid acidic strength is equivalent to that of 60% sulfuric acid, but its corrosiveness and volatility are significantly reduced, which has a major improvement for equipment protection and operational safety. After it was used to replace hydrochloric acid in the production of modified starch, the equipment overhaul cycle was extended by 2 to 3 times. During transportation and storage, the solid form of Potassium Bisulfate avoids the risk of liquid acid leakage, increasing the content of effective acidic substances per unit volume by more than 40%. These characteristics reduce the cost of material storage and transportation by approximately 25%, especially with significant benefits in long-distance transportation.
In terms of reaction controllability, Potassium Bisulfate stands out particularly. Compared with volatile acids such as hydrochloric acid, it loses very little acidic components in high-temperature reactions, which is conducive to maintaining a stable reaction environment. After using it instead of sulfuric acid in some esterification reactions, the side reactions were reduced by approximately 18%, and the color of the product was significantly improved. The buffering property of the solution enables it to have better regulation accuracy in ph-sensitive reactions, which is crucial for the quality control of pharmaceutical intermediate synthesis. In the continuous production process, the Potassium Bisulfate system is more likely to achieve automatic control, and the equipment cleaning frequency is reduced by more than 50% compared with the traditional acid process.
Environmental protection performance is one of the core competitiveness of this product. The pollution load throughout the entire life cycle is significantly lower than that of traditional acidic substances, and the sulfur emissions during the production process are reduced by 30% to 40%. When dealing with the same acidic requirements, the amount of waste residue produced by the Potassium Bisulfate system is only 1/5 of that of the sulfuric acid process. Its decomposition product, potassium element, has natural ecological affinity and will not cause the problem of heavy metal accumulation in the soil. In the application of cleaning agents in the electronics industry, the formula containing Potassium Bisulfate has a toxicity reduction of over 90% compared to the hydrofluoric acid system, and the difficulty of wastewater treatment is correspondingly reduced. These environmental protection advantages make it highly favored in green chemical process transformation projects.
In terms of economic benefits, the long-term usage cost of Potassium Bisulfate has strong competitiveness. Although the procurement cost per unit mass is higher than that of ordinary sulfuric acid, its utilization efficiency is 20% -30% higher.The specially designed sustained-release formulation can extend the effective action time by 3-5 times and greatly reduce the frequency of supplementation. Breakthroughs in recycling technology have enabled the recovery rate of industrial waste liquid to reach over 85%, which has significant cost advantages for large-scale users. Compared with imported specialty acids, the quality of domestic Potassium Bisulfate has fully reached the same standard, while the price is only about 60% of imported products. These factors have jointly promoted its continuous increase in market penetration.
The outstanding advantage of Potassium Bisulfate is its compatibility with most conventional chemicals. In the preparation of compound fertilizers, stable complexes can be formed with phosphorus and nitrogen nutrients to ensure the stability of effective ingredients during storage. In the formula of industrial cleaning agents, their synergistic effect with surfactants increases the cleaning efficiency by 40%. When combined with oxidants, it does not induce dangerous reactions, which demonstrates important safety value in the application of PCB etching solutions. Good tolerance to temperature, light and other factors, with a shelf life of up to 24 months, significantly better than liquid acidic products. This broad compatibility expands its application possibilities in different industries.
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Related References:
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