What is Aluminum Sulfate Octadecahydrate (Al₂H₃₆O₃₀S₃)?

Aluminum Sulfate Octadecahydrate (Al₂H₃₆O₃₀S₃) is a hydrated aluminum salt widely used in water treatment, paper manufacturing, textiles, pharmaceuticals, and chemical processing. It serves as a flocculant, mordant, pH regulator, and coagulant, making it an essential industrial compound.

Chemical Properties and CAS Number

• Chemical Formula: Al₂H₃₆O₃₀S₃
• CAS Number: 7784-31-8
• Appearance: White crystalline solid
• Density: ~1.62 g/cm³
• Melting Point: Decomposes before melting
• Solubility: Highly soluble in water, forming an acidic solution
• Chemical Stability: Strongly acidic, reacts with bases and organic materials

Applications of Aluminum Sulfate Octadecahydrate (Al₂H₃₆O₃₀S₃)

1. Water Treatment & Purification

Used in municipal water treatment, wastewater purification, and industrial effluent treatment as a coagulant and flocculant.

2. Paper & Pulp Industry

Applied in paper sizing, ink retention, and pH control to improve paper strength and printability.

3. Textile & Leather Processing

Utilized as a mordant in dyeing, tanning agent, and pH stabilizer to enhance fabric and leather quality.

4. Pharmaceuticals & Cosmetics

Used in antiperspirants, astringents, and medical formulations due to its antibacterial and coagulating properties.

5. Chemical Processing & Industrial Applications

Employed as a catalyst, acidifying agent, and filler in various chemical and industrial processes.

6. Agriculture & Soil Conditioning

Integrated into soil amendments, pH regulation, and fertilizers to neutralize alkaline soils and improve crop growth.

Pricing of Aluminum Sulfate Octadecahydrate (Al₂H₃₆O₃₀S₃)

Prices vary based on purity, industrial application, and bulk purchase volume:

• Industrial Grade: Typically ranges from $50 – $300 per metric ton
• High-Purity/Specialized Grade: Prices range from $500 – $2,000 per metric ton, used in pharmaceutical, cosmetic, and specialty chemical applications.

Factors Influencing Aluminum Sulfate Prices

• Purity level and hydration state
• Bulk order volume and market demand
• Processing method and synthesis cost
• Industry-specific requirements (e.g., food-grade, pharmaceutical-grade)

Conclusion

Aluminum Sulfate Octadecahydrate (Al₂H₃₆O₃₀S₃) is a versatile and widely used chemical compound in water treatment, paper production, textiles, pharmaceuticals, and industrial processing. Its coagulating, acidic, and stabilizing properties make it essential for various industrial and scientific applications. Pricing depends on purity, processing, and bulk order volume.