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E523 Aluminium ammonium sulphate, NH4AI(S04)2·12H2O, is colorless, odorlesswater-soluble crystals.
E523 Aluminium ammonium sulphate, it is used in manufacturing medicines and baking powder, and in dyeing,tanning,andpapermaking.
E523 Aluminium ammonium sulphate, also known as ammonium alum, is an inorganic double salt of aluminium sulphate and ammonium sulphate with the chemical formula NH₄Al(SO₄)₂·12H₂O.
CAS Number: 7784-25-0
Molecular Formula: AlH4NO8S2
Molecular Weight:v237.15
EINECS Number: 232-055-3
Synonyms: Monoammonium monoaluminum sulfate, Aluminum ammonium alum, Ammonium aluminum alum, Caswell No. 041B, Exsiccated ammonium alum, Alum ammonium anhydrous, DPU64XYB1D, Aluminum ammonium bis sulfate, DTXSID7051428, Aluminum ammonium disulfate Al(NH4)(SO4)2, RefChem:111643, aluminum sulfate ammonium salt, DTXCID5030030, aluminium 3+ ion ammonium disulfate, 7784-25-0, Alum ammonium, Aluminum ammonium sulfate, Aluminum ammonium sulphate, Ammonium aluminum sulfate, Curb, Aluminium ammonium bis sulphate, aluminum azanium disulfate, Ammonium alum, Ammonium aluminum alum, Ammonium aluminum sulfate, HSDB 611, EINECS 232-055-3, EPA Pesticide Chemical Code 098501, NSC 146176, AMMONIUM-ALUM, UNII-DPU64XYB1D, AMMONIUM ALUM ANHYDROUS, INS NO.523, INS-523, ALUM AMMONIUM EXSICCATED, Aluminium ammonium sulfate 1/1/2, AMMONIUM ALUM USP MONOGRAPH, ALUMINUM AMMONIUM SULFATE MI, ALUMINUM AMMONIUM SULFATE HSDB, ALUMINIUM AMMONIUM SULFATE ANHYDROUS, AMMONIUM ALUMINIUM SULFATE WHO-DD, DB-229785, E-523, NS00080481, EC 232-055-3, SULFURIC ACID ALUMINIUM AMMONIUM SALT 2:1:1, AMMONIUM ALUMINIUM SULPHATE;ammonium aluminum sulfatehydrate;aluminiumammoniumsulfate;aluminumammoniumalum;exsiccatedammoniumalum;monoammoniummonoaluminumsulfate;sulfuricacid,aluminumammoniumsalt;Sulfuricacid,aluminumammoniumsalt(2:1:1)
E523 Aluminium ammonium sulphate is used mainly as a coagulant, firming agent, acidity regulator, and processing aid in water treatment, industrial processing, and some traditional applications.
E523 Aluminium ammonium sulphate belongs to the group of “alum” compounds that share similar chemical behavior.
Chemically, it contains ammonium ions (NH₄⁺), aluminium ions (Al³⁺), and sulfate ions (SO₄²⁻) in a hydrated crystalline structure.
E523 Aluminium ammonium sulphate, commonly known as ammonium alum, also plays an important role in controlled coagulation chemistry, where its effectiveness comes from the gradual release of aluminium ions in water, which destabilize fine suspended particles and encourage them to collide and form larger, heavier flocs that can be separated much more efficiently through sedimentation or filtration processes in both drinking water and industrial treatment systems.
Because this reaction occurs in a relatively predictable and mild acidic range, it allows operators to fine-tune clarification performance without causing extreme pH shifts.
E523 Aluminium ammonium sulphate improves process stability and operational control in water treatment plants.
In traditional and small-scale water purification systems, ammonium alum has historically been used in households and rural areas to clarify cloudy water by binding fine clay, organic matter, and microbial particles into visible aggregates that settle at the bottom of containers over time, making the upper water layer significantly clearer and easier to decant for safe use.
E523 Aluminium ammonium sulphate simple but effective mechanism made alum compounds widely important before modern filtration technologies became available.
E523 Aluminium ammonium sulphate improves accessibility of basic water purification methods.
In textile processing systems, E523 Aluminium ammonium sulphate continues to be relevant as a mordant because it forms coordination bridges between dye molecules and fiber surfaces, allowing dyes to attach more strongly and uniformly, which reduces patchiness and improves resistance to washing, light exposure, and long-term fading in both natural and synthetic textile materials.
E523 Aluminium ammonium sulphate chemical bonding effect is particularly important in traditional dyeing techniques that rely on mineral-based fixation rather than synthetic binders.
This improves color durability and fabric quality consistency.
In leather tanning operations, E523 Aluminium ammonium sulphate contributes to stabilizing collagen fiber networks within animal hides by interacting with protein structures and helping reduce microbial degradation during processing, which results in a more durable and structured final leather product that maintains flexibility while gaining improved resistance to environmental wear.
E523 Aluminium ammonium sulphates relatively mild acidic nature allows controlled tanning conditions compared with stronger mineral acids.
E523 Aluminium ammonium sulphate improves material strength and preservation quality.
In paper manufacturing and surface treatment systems, E523 Aluminium ammonium sulphate is used to regulate how paper fibers interact with inks, coatings, and sizing agents, because it modifies surface charge and porosity in a way that helps reduce excessive ink spreading while improving print sharpness, consistency, and overall surface uniformity in finished paper products.
This is especially important in high-quality printing paper production where precision of ink absorption directly affects visual output.
This improves print performance and surface control.
In cosmetic and hygiene applications, E523 Aluminium ammonium sulphate has been used in some formulations due to its astringent behavior, which temporarily contracts surface tissues and reduces moisture levels on the skin, while also creating conditions that are less favorable for odor-causing bacteria, although its use in modern consumer products is more limited and often replaced by safer or more specialized alternatives.
Historically, it was used in deodorants and aftershave-type preparations for this reason.
E523 Aluminium ammonium sulphate improves short-term hygiene and skin conditioning effects.
When dissolved in water, it forms a mildly acidic solution due to aluminium ion hydrolysis.
This gives it coagulating and astringent properties similar to other alum salts.
Physically, it appears as a white crystalline solid or powder.
E523 Aluminium ammonium sulphate is soluble in water and produces clear, slightly acidic solutions.
It is stable under normal storage conditions but may lose water of crystallization when heated.
E523 Aluminium ammonium sulphate functions as a coagulant and flocculant, helping suspended particles in water to clump together into larger aggregates.
These aggregates can then be removed by sedimentation or filtration.
This improves water clarification efficiency.
E523 Aluminium ammonium sulphate is used in water purification systems, where it helps remove turbidity, fine particles, and impurities from drinking and wastewater.
It supports the production of clearer and safer water.
This improves overall water quality.
It is also used as a firming agent in some food-related processing contexts (limited and regulated use), where it helps maintain texture in plant-based materials.
E523 Aluminium ammonium sulphate strengthens structural components in processed systems.
E523 Aluminium ammonium sulphate improves product stability.
E523 Aluminium ammonium sulphate is best described as a hydrated double alum salt used mainly for coagulation, clarification, and pH-related processing due to its ability to form flocs and stabilize liquid systems through aluminium ion activity.
E523 Aluminium ammonium sulphate is used in the preparation of Alum (Al(OH)3) gel.
E523 Aluminium ammonium sulphate is used in cosmetic formulation, fertilizers, food preservation and in the heating system.
E523 Aluminium ammonium sulphate is supplied as colourless crystals or as a white crystalline powder.
E523 Aluminium ammonium sulphate, also known as ammonium alum or just alum (though there are many different substances also called "alum"), is a white crystalline double sulfate usually encountered as the dodecahydrate, formula (NH4)Al(SO4)2·12H2O.
E523 Aluminium ammonium sulphate is used in small amounts in a variety of niche applications.
The dodecahydrate occurs naturally as the rare mineral tschermigite.
Melting point: 93.5℃
Density: 1.64
Solubility: slightly soluble in H2O; insoluble in ethanol
Form: white powder
Color: white
Water Solubility: slightly soluble H2O; insoluble EtOH [CRC10]
Cosmetics Ingredients Functions: ASTRINGENT; ANTIPERSPIRANT
InChI: InChI=1S/Al.H3N.2H2O4S/c;;21-5(2,3)4/h;1H3;2(H2,1,2,3,4)/q+3;;;/p-3
InChIKey: LCQXXBOSCBRNNT-UHFFFAOYSA-K
SMILES: S(=O)(=O)(O)[O-].S([O-])([O-])(=O)=O.N.[Al+3]
LogP: -1.031 (est)
E523 Aluminium ammonium sulphate is made from aluminium hydroxide, sulfuric acid and ammonium sulfate.
E523 Aluminium ammonium sulphate forms a solid solution with potassium alum.
E523 Aluminium ammonium sulphate is used in the production of grinding powders and as precursors to synthetic gems.
In industrial wastewater treatment systems, E523 Aluminium ammonium sulphate can assist in removing suspended solids, dyes, oils, and fine particulate matter by promoting aggregation and sedimentation reactions that simplify downstream filtration and sludge handling, especially in systems where gradual floc formation is preferred over rapid precipitation to maintain flow stability.
This makes it useful in controlled treatment processes where water quality varies over time.
E523 Aluminium ammonium sulphate improves wastewater clarity and process adaptability.
In laboratory and educational chemistry, E523 Aluminium ammonium sulphate is frequently used as a demonstration compound for crystallization experiments because it forms large, well-defined crystals under controlled cooling or evaporation conditions, which makes it ideal for teaching concepts such as solubility, lattice formation, and ionic compound behavior in aqueous systems.
Its predictable crystallization pattern makes it a reliable educational material.
E523 Aluminium ammonium sulphate improves experimental learning and chemical visualization.
E523 Aluminium ammonium sulphate is a hydrated double alum salt used across water treatment, traditional purification, textile dyeing, leather processing, paper manufacturing, cosmetics, wastewater treatment, and chemical education because of its ability to generate controlled aluminium-ion-driven coagulation, stabilize materials, and modify surface and particle interactions in a predictable and manageable way across a wide range of industrial and historical applications.
It is used as acid source in baking powder for bakery products, baked at high temperature.
E523 Aluminium ammonium sulphate also stabilises colours.
E523 Aluminium ammonium sulphate is also widely used in traditional water clarification methods, where it has historically been added to turbid water to help suspended clay and organic particles settle more quickly.
E523 Aluminium ammonium sulphate process has been used for centuries in both household and municipal water treatment practices.
This improves natural water purification.
E523 Aluminium ammonium sulphate is used in textile dyeing processes, where it acts as a mordant to help dyes bind more strongly to fibers.
It improves color fixation and reduces dye fading over time.
E523 Aluminium ammonium sulphate improves textile durability.
In leather processing, it supports stabilization of collagen fibers during tanning.
It helps preserve structural integrity of hides.
E523 Aluminium ammonium sulphate improves leather quality.
In paper manufacturing, E523 Aluminium ammonium sulphate can be used in sizing and surface treatment to control ink absorption and improve print quality.
It helps regulate paper porosity and surface behavior.
E523 Aluminium ammonium sulphate improves printing performance.
E523 Aluminium ammonium sulphate is also used in cosmetic and personal care products (historical and limited modern use), where its astringent properties help tighten skin and reduce minor irritation or odor-causing bacteria.
This is similar to other alum compounds used in deodorants and aftershave products.
E523 Aluminium ammonium sulphate improves hygiene applications.
Uses Of E523 Aluminium ammonium sulphate:
E523 Aluminium ammonium sulphate is a general purpose food additive that functions as a buffer and neutralizing agent.
E523 Aluminium ammonium sulphates solubility is 1 g in 7 ml of water at 25°c and 1 g in 0.3 ml of boiling water.
E523 Aluminium ammonium sulphate is used in baking powders.
E523 Aluminium ammonium sulphate is not a major industrial chemical or a particularly useful laboratory reagent, but it is cheap and effective, which invites many niche applications.
It is used in water purification, in vegetable glues, in porcelain cements, in deodorants and in tanning, dyeing and in fireproofing textiles.
The pH of the solution resulting from the topical application of ammonium alum with perspiration is typically in the slightly acid range, from 3 to 5.
E523 Aluminium ammonium sulphate is mainly used as a coagulant, flocculant, and processing aid in water treatment and industrial clarification systems.
It helps suspended particles in liquids aggregate into larger flocs that can be removed more easily.
E523 Aluminium ammonium sulphate improves purification efficiency.
In drinking water treatment, E523 Aluminium ammonium sulphate is used to reduce turbidity and remove fine particles and impurities.
It supports clarification and filtration processes.
E523 Aluminium ammonium sulphate improves water safety and clarity.
In wastewater treatment, E523 Aluminium ammonium sulphate helps remove suspended solids, organic matter, and contaminants from industrial and municipal effluents.
It improves sedimentation and sludge formation.
E523 Aluminium ammonium sulphate improves environmental treatment.
In textile dyeing, it is used as a mordant to help dyes adhere more effectively to fibers.
E523 Aluminium ammonium sulphate improves color fastness and uniformity.
E523 Aluminium ammonium sulphate improves fabric quality.
In leather tanning, it stabilizes protein structures in hides and supports controlled tanning reactions.
It helps improve durability and preservation.
This improves leather performance.
In paper production, E523 Aluminium ammonium sulphate is used for sizing and surface treatment to control ink absorption and improve paper strength.
It helps regulate fiber and coating interactions.
E523 Aluminium ammonium sulphate improves print quality.
In industrial process water systems, E523 Aluminium ammonium sulphate is used to clarify liquids before reuse or further processing.
It helps maintain stable production conditions.
E523 Aluminium ammonium sulphate improves operational efficiency.
E523 Aluminium ammonium sulphate is mainly used as a coagulant, flocculant, firming agent, mordant, and processing aid in water treatment, textile processing, paper manufacturing, and several industrial systems because of its ability to release aluminium ions in a controlled way, which allows suspended particles to aggregate into larger flocs that can be separated efficiently through sedimentation or filtration.
This controlled coagulation behavior makes it particularly useful in systems where gradual clarification is preferred rather than rapid precipitation.
E523 Aluminium ammonium sulphate improves process stability and purification control.
E523 Aluminium ammonium sulphate is used to remove turbidity and fine suspended impurities by destabilizing colloidal particles and forming visible flocs that settle out of water, which significantly improves clarity, safety, and overall water quality before distribution or further disinfection steps.
This makes it an important component in conventional water purification infrastructure.
E523 Aluminium ammonium sulphate improves drinking water clarity and safety.
E523 Aluminium ammonium sulphate is used to remove suspended solids, organic matter, dyes, and other fine contaminants from industrial or municipal effluents by promoting floc formation and improving sedimentation efficiency in clarification tanks and filtration systems.
E523 Aluminium ammonium sulphate helps reduce pollution load before water discharge or reuse.
This improves environmental treatment efficiency.
E523 Aluminium ammonium sulphate is used as a mordant because it enhances the binding of dye molecules to textile fibers by forming coordination interactions that increase dye fixation, resulting in more uniform coloration and improved resistance to washing, light exposure, and long-term fading.
This is especially important in traditional dyeing techniques as well as specialty textile manufacturing.
E523 Aluminium ammonium sulphate improves color durability and textile quality.
In leather tanning and hide processing, E523 Aluminium ammonium sulphate is used to stabilize collagen fibers in animal hides during chemical treatment, which helps preserve structural integrity and improve the durability, flexibility, and overall quality of finished leather products used in industrial and commercial applications.
Its mild acidity allows controlled processing conditions during tanning.
E523 Aluminium ammonium sulphate improves leather strength and preservation.
E523 Aluminium ammonium sulphate is used to control how paper fibers interact with water-based inks and coatings, helping reduce excessive ink absorption and improving print sharpness, surface smoothness, and overall paper performance during high-quality printing processes.
E523 Aluminium ammonium sulphate also contributes to improved fiber bonding and surface uniformity.
This improves printability and paper consistency.
E523 Aluminium ammonium sulphate is used to clarify recycled or process water by removing fine suspended solids before reuse in manufacturing operations, which helps maintain stable production conditions and reduces contamination in closed-loop water systems.
This is important for improving efficiency and reducing water consumption in industry.
E523 Aluminium ammonium sulphate improves operational efficiency and water reuse.
E523 Aluminium ammonium sulphate is used as a standard coagulant and crystallization compound for demonstrating ionic interactions, solubility behavior, and crystal growth processes under controlled conditions, making it valuable for teaching fundamental concepts in inorganic chemistry.
Its predictable behavior makes it suitable for repeatable experiments.
E523 Aluminium ammonium sulphate improves scientific education and demonstration reliability.
E523 Aluminium ammonium sulphate is used across water purification, wastewater treatment, textile dyeing, leather tanning, paper manufacturing, industrial water systems, and laboratory applications because of its strong coagulating, mordanting, and stabilizing properties, which allow it to modify particle interactions, improve separation processes, and enhance material performance in a wide range of controlled chemical and industrial environments.
Safety Profile Of E523 Aluminium ammonium sulphate:
Irritating if inhaled or ingested.
E523 Aluminium ammonium sulphate upon decomposition it emits toxic fumes of NOx and SOx,.
E523 Aluminium ammonium sulphate is considered a low-to-moderate hazard substance, but it can still cause irritation and health effects under certain exposure conditions.
Its main risks are related to its acidity, aluminium content, and dust exposure.
E523 Aluminium ammonium sulphate is generally safe under controlled industrial use.
The most common hazard is eye and skin irritation.
Contact with powder or concentrated solutions may cause redness, burning, or discomfort.
E523 Aluminium ammonium sulphate prolonged exposure can increase irritation severity.
Inhalation of dust may cause respiratory irritation, including coughing, throat dryness, or discomfort.
E523 Aluminium ammonium sulphate is mainly an occupational handling risk.
Good ventilation reduces exposure.
Ingestion of large amounts may cause gastrointestinal irritation, such as nausea, vomiting, or stomach pain.
E523 Aluminium ammonium sulphate is due to its acidic and astringent nature.
Normal regulated use is considered safe.
Because it contains aluminium ions, long-term excessive exposure is scientifically monitored, although no confirmed severe toxicity is established at approved levels.
E523 Aluminium ammonium sulphate supports controlled regulatory use in industry.
E523 Aluminium ammonium sulphate forms mildly acidic solutions, which may irritate sensitive tissues or react with alkaline substances.
This requires careful handling in concentrated form.
E523 Aluminium ammonium sulphate increases industrial safety precautions.
From an environmental perspective, excessive release may contribute to water acidity changes and aluminium accumulation in ecosystems, which can affect aquatic organisms.
