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Potassium Hydrogen Sulphite is an inorganic salt, widely used as a reducing agent, preservative, and antioxidant in food and industrial applications.
Potassium Hydrogen Sulphites chemical formula is KHSO₃.
Potassium Hydrogen Sulphite belongs to the class of sulfite/bisulfite salts.
CAS Number: 7773-03-7
Molecular Formula: HKO3S
Molecular Weight: 120.17
EINECS N amber: 231-870-1
Synonyms: Potassium bisulfite, Potassium hydrogen sulfite, 7773-03-7, Monopotassium sulfite, QJK5LO891P, Sulfurous acid potassium salt (1:1), Potassium bisulphite, UNII-QJK5LO891P, Potassium sulfite hydrogen, INS No. 228, DTXSID6064795, Potassium bisulfite II, HSDB 1263, INS-228, Potassium bisulfite HSDB, Sulfurous acid monopotassium salt, Potassium bisulfite MART, EINECS 231-870-1, E-228, Potassium bisulfite solution, Potassium bisulphite solution, UN2693, 231-870-1, Potassium hydrogen sulphite, 4429-42-9, Kaliumbisulfit, Potassium acid sulfite, Potassium hydrogensulfite, Potassium sulfite KHSO3, SCHEMBL65585, SCHEMBL3294524, AKOS025293926, DB-231692, NS00131250, Q412524, POTASSIUM BISULFITE;Potassium acid sulfite;POTASSIUM HYDROGEN SULFITE, potassiumbisulfitesolution, potassiumhydrogensulphite;potassiumsulfite, hydrogen;Sulfurousacid, monopotassiumsalt, Sulfurous acid hydrogen=potassium salt
Potassium Hydrogen Sulphite consists of potassium ions (K⁺) and hydrogen sulfite ions (HSO₃⁻).
The bisulfite ion exhibits reducing and nucleophilic behavior.
This enables participation in various chemical reactions.
Potassium Hydrogen Sulphite is typically found as an aqueous solution or moist solid, as it is unstable in dry form.
Potassium Hydrogen Sulphite appears as a colorless to slightly yellow solution or crystalline material.
It has a characteristic sulfur dioxide-like odor.
Potassium Hydrogen Sulphite exhibits reducing properties, meaning it can donate electrons in reactions.
Potassium Hydrogen Sulphite reacts readily with oxidizing agents.
This is important in preservation and chemical processes.
Potassium hydrogen sulphite can release sulfur dioxide (SO₂) under acidic or heated conditions.
This contributes to its antimicrobial and antioxidant effects.
Potassium Hydrogen Sulphite must be handled carefully.
Potassium Hydrogen Sulphite is chemically unstable, especially when exposed to air, heat, or strong acids.
It can oxidize to form sulfates.
Proper storage is necessary.
Potassium Hydrogen Sulphite is used in food preservation, water treatment, and chemical processing.
Potassium Hydrogen Sulphite helps prevent oxidation and microbial growth.
This highlights its practical importance.
Potassium Hydrogen Sulphite is best described as a reactive inorganic bisulfite salt used as a reducing agent and preservative, especially in aqueous systems.
Potassium Hydrogen Sulphite, also known as potassium bisulfite, is an inorganic salt mainly used as a food preservative (E228), antioxidant, and antimicrobial agent in wine and juice production.
Potassium Hydrogen Sulphite appears as a white crystalline solid or a colorless aqueous solution with a slight sulfur dioxide odor, often used to prevent discoloration and oxidation.
Potassium Hydrogen Sulphite is a chemical mixture with the approximately correctly mentioned formula chemical formula KHSO3.
Potassium Hydrogen Sulphite in fact is not an actual compound, but a mixture of salts that dissolve in water to give solutions composed of potassium ions and bisulfite ions.
Potassium Hydrogen Sulphite is a white solid with an odor of sulfur dioxide.
Attempts to crystallize potassium bisulfite yield potassium metabisulfite, K2S2O5.
Potassium Hydrogen Sulphite is used as a sterilising agent in the production of alcoholic beverages.
This additive is classified as E number E228 under the current EU-approved food additive legislation.[4]
Potassium Hydrogen Sulphite exhibits reversible equilibria between bisulfite (HSO₃⁻), sulfite (SO₃²⁻), and dissolved sulfur dioxide (SO₂).
This equilibrium depends strongly on pH.
Potassium Hydrogen Sulphite governs its reactivity and effectiveness.
Potassium Hydrogen Sulphite shows strong nucleophilic behavior, allowing it to react with electrophilic carbonyl compounds.
Potassium Hydrogen Sulphite forms stable bisulfite addition products.
This is useful in organic chemistry.
Potassium Hydrogen Sulphite acts as an antioxidant by interrupting oxidation chains, especially in aqueous systems.
Potassium Hydrogen Sulphite reacts with oxygen and reactive species.
This protects sensitive materials.
Potassium hydrogen sulphite can influence microbial activity, particularly by releasing SO₂.
Sulfur dioxide inhibits enzymes in microorganisms.
This contributes to preservation effects.
Potassium Hydrogen Sulphite demonstrates buffer-like behavior in certain pH ranges, helping stabilize solution conditions.
Potassium Hydrogen Sulphite supports consistent reactions.
Potassium Hydrogen Sulphite is sensitive to heat, air, and light, which can accelerate decomposition or oxidation.
Melting point: decomposes at 190℃ [HAW93]
solubility: insoluble in ethanol
form: white crystalline powder
color: white crystals, crystalline powder
Water Solubility: soluble H2O; insoluble alcohol [HAW93]
Potassium Hydrogen Sulphite is made by the reaction of sulfur dioxide and potassium carbonate.
The sulfur dioxide is passed through a solution of the potassium carbonate until no more carbon dioxide is evolved.
Potassium hydrogen sulphite (potassium bisulfite) is typically produced by absorbing sulfur dioxide (SO₂) into a potassium-containing solution, such as potassium carbonate or potassium hydroxide.
This forms a bisulfite-rich solution.
Potassium Hydrogen Sulphite is often prepared in situ.
The compound exists in equilibrium with dissolved SO₂ and sulfite species in aqueous solution.
Potassium Hydrogen Sulphites composition depends on pH and temperature.
This affects its chemical behavior.
It exhibits moderate acidity, due to the HSO₃⁻ ion.
It can act both as an acid and a reducing agent.
This dual functionality is important in reactions.
Potassium hydrogen sulphite shows strong oxygen-scavenging ability, reacting readily with dissolved oxygen.
Potassium Hydrogen Sulphite helps prevent oxidation processes.
This is useful in preservation and water treatment.
The compound can form addition compounds with aldehydes and ketones (bisulfite adducts).
This is used in purification and separation techniques.
Potassium Hydrogen Sulphite is a classical chemical application.
It demonstrates bleaching and decolorizing properties, especially in textile and food processing.
Potassium Hydrogen Sulphite reduces colored compounds.
This improves appearance and quality.
Potassium hydrogen sulphite is highly soluble in water, existing mainly as ions.
It is rarely handled as a dry, stable solid.
This influences its practical use.
It can gradually oxidize to potassium sulfate or sulfite upon exposure to air.
This reduces its effectiveness over time.
Potassium Hydrogen Sulphite is a reactive, aqueous bisulfite system with reducing, bleaching, and oxygen-scavenging properties, widely used in preservation, purification, and industrial processes.
Potassium Hydrogen Sulphite may interact with metal ions, sometimes forming complexes or influencing corrosion processes.
This can affect system behavior.
It is important in industrial applications.
Because of its reactivity, it is often used in controlled dosing systems to avoid excess SO₂ release.
It improves process control.
Potassium Hydrogen Sulphite is a highly reactive, equilibrium-based bisulfite system with nucleophilic, antioxidant, and antimicrobial properties, making it valuable in preservation, chemical processing, and industrial applications.
Uses Of Potassium Hydrogen Sulphite:
Potassium Hydrogen sulfite is a preservative that retards bacterial action, prevents discoloration, and functions as an antioxidant.
Potassium Hydrogen Sulphite is not used in meats or in food recognized as a source of vitamin b1 and it is not used on fruits or vegetables intended to be served raw or presented as fresh.
Potassium hydrogen sulphite (potassium bisulfite) is widely used in the food and beverage industry as a preservative and antioxidant (E228).
It helps prevent oxidation and microbial spoilage.
In wine and beverage production, it is used to control oxidation and inhibit unwanted microorganisms.
Potassium Hydrogen Sulphite helps stabilize flavor and color.
This improves product quality.
It is applied in fruit processing, such as dried fruits and juices, to prevent browning reactions.
Potassium Hydrogen Sulphite inhibits enzymatic oxidation.
This preserves appearance and freshness.
In water treatment systems, it acts as an oxygen scavenger and reducing agent.
Potassium Hydrogen Sulphite removes dissolved oxygen.
This helps prevent corrosion.
Potassium hydrogen sulphite is used in textile and paper industries as a bleaching and decolorizing agent.
Potassium Hydrogen Sulphite helps remove unwanted color.
This improves material quality.
In chemical synthesis, it is used as a reducing agent and intermediate.
Potassium Hydrogen Sulphite participates in sulfur-based reactions.
This supports industrial production.
It is applied in leather processing for preservation and treatment of hides.
Potassium Hydrogen Sulphite helps control microbial growth.
This improves processing efficiency.
In gas treatment systems, it is used to absorb and neutralize sulfur dioxide.
Potassium Hydrogen Sulphite helps control emissions.
This supports environmental management.
It is also used in analytical and laboratory chemistry for forming bisulfite addition compounds with aldehydes.
Potassium Hydrogen Sulphite aids purification and identification.
This supports research work.
Potassium Hydrogen Sulphite is used wherever reducing action, antioxidant protection, oxygen removal, and microbial control are required, especially in food preservation, water treatment, textiles, and chemical processing.
Potassium hydrogen sulphite (potassium bisulfite) is used in brewery and fermentation processes to control oxidation and unwanted microbial activity.
It helps stabilize fermentation conditions.
This improves product consistency.
In juice and soft drink production, it is applied to preserve color and flavor during storage.
Potassium Hydrogen Sulphite prevents oxidative degradation.
This enhances product quality.
Potassium Hydrogen Sulphite is used in food packaging and storage systems as part of preservation strategies.
It helps protect products from spoilage.
In industrial cleaning and descaling formulations, it acts as a reducing agent to remove oxidized residues.
Potassium Hydrogen Sulphite helps break down deposits.
This improves cleaning efficiency.
Potassium hydrogen sulphite is applied in metal processing and surface treatment.
Potassium Hydrogen Sulphite helps prevent oxidation during processing.
This improves surface quality.
It is used in photographic and imaging processes (historically) as a reducing and stabilizing agent.
Potassium Hydrogen Sulphite helps control chemical reactions.
This supports image development.
In chemical purification processes, it forms bisulfite addition compounds with aldehydes.
This allows selective separation.
This supports fine chemical production.
Potassium Hydrogen Sulphite is applied in oil and gas systems as an oxygen scavenger.
It helps protect pipelines and storage systems.
This reduces corrosion risk.
Potassium Hydrogen Sulphite is also used in agricultural formulations to stabilize solutions and control oxidation.
It helps maintain effectiveness of active ingredients.
This supports product performance.
Potassium Hydrogen Sulphite is used wherever oxygen scavenging, antioxidant protection, reduction, and microbial control are required across food, industrial, environmental, and chemical applications.
Safety Profile Of Potassium Hydrogen Sulphite:
Potassium Hydrogen Sulphite presents moderate hazards, mainly due to its ability to release sulfur dioxide (SO₂), acidity, and reducing properties.
It requires careful handling, especially in solution form.
Proper safety measures are essential.
Skin contact may cause irritation, particularly with prolonged exposure to concentrated solutions.
Symptoms can include redness or discomfort.
Protective gloves are recommended.
Eye contact can cause moderate to severe irritation.
Symptoms include redness, pain, and watering.
Immediate rinsing with plenty of water is necessary.
Inhalation is a significant hazard, especially due to released sulfur dioxide gas.
SO₂ can cause respiratory irritation, coughing, and breathing difficulty.
High exposure may lead to serious respiratory effects.
Ingestion is harmful and may cause gastrointestinal irritation and systemic effects.
Symptoms may include nausea, vomiting, and discomfort.
Medical attention should be sought if swallowed.
Potassium hydrogen sulphite is not flammable, but it can decompose when heated or acidified.
This decomposition releases sulfur dioxide gas.
Proper ventilation is required.
The compound is chemically reactive, especially with acids and oxidizing agents.
Potassium Hydrogen Sulphite should be handled away from incompatible substances.
Thermal decomposition produces toxic fumes, primarily sulfur dioxide and other sulfur oxides.
