Aluminum Sulfate
Aluminum Sulfate (CAS: 10043-01-3), also called alum, is a white crystalline inorganic salt widely recognized as one of the most cost-effective and dependable coagulants in water treatment. When dissolved in water, it hydrolyzes to form positively charged aluminum species that neutralize the charge of suspended colloidal particles, causing them to aggregate into flocs that settle rapidly and can be filtered out. This clarifying action makes it essential in municipal drinking-water plants, wastewater facilities, and industrial effluent treatment. Beyond water treatment, aluminum sulfate is used in the paper industry as a rosin sizing agent and pH conditioner to improve sheet strength and printability, and in textile processing as a mordant that fixes dyes onto fibers. Additional applications include soil pH adjustment, fire-retardant formulations, and cosmetic antiperspirant systems. Its high solubility, consistent performance, and economical pricing secure its position as a foundational chemical in municipal and industrial operations worldwide.
– Municipal and Industrial Water Treatment: Used as a primary coagulant to remove suspended solids, turbidity, color, and phosphates from drinking water and wastewater.
– Pulp and Paper Manufacturing: Employed in rosin sizing systems to anchor sizing agents to fibers, control pH, and improve paper strength, retention, and print quality.
– Textile and Dyeing Industry: Applied as a mordant to fix natural and synthetic dyes onto cotton and wool fabrics, enhancing color fastness and uniformity.
– Soil and Miscellaneous Applications: Utilized for soil acidification in alkaline soils, as a component of fire-retardant treatments, and as an active ingredient in antiperspirant formulations.
Product Name: Aluminum Sulfate
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