Description

Aluminium Sulfate Octadecahydrate is a highly versatile inorganic salt widely used as a primary coagulant and flocculant in water treatment processes. Its effectiveness in purifying both industrial wastewater and municipal drinking water makes it a cornerstone chemical for environmental management and public health. This compound is essential for industries ranging from paper manufacturing and textile processing to cosmetics and pharmaceuticals, where it serves critical functions in production and purification.

Application

• Water & Wastewater Treatment: Primary coagulant for removing suspended solids, colloidal particles, and phosphates in municipal drinking water and industrial effluent.
• Paper Industry: Used as a sizing agent and retention aid to improve paper quality, water resistance, and pigment retention.
• Textile Processing: Acts as a mordant in dyeing processes to fix colors onto fabrics and as a coagulant for wastewater.
• Cosmetics & Personal Care: Employed as an astringent and active ingredient in antiperspirant formulations.
• Construction: Used as an accelerator in concrete setting and for soil stabilization.
• Agriculture: Functions as a soil conditioner to lower pH in alkaline soils.
• Pharmaceuticals: Serves as a raw material and clarifying agent in certain drug manufacturing processes.
• Firefighting Foam: A component in some Class A firefighting foams.

Basic Information

Product Name	Aluminium Sulfate Octadecahydrate
CAS No.	7784-31-8
Molecular Formula	Al2(SO4)3 · 18H2O
Molecular Weight	666.43 g/mol
Synonyms	Aluminum Sulfate Octadecahydrate; Sulfuric Acid, Aluminum Salt (3:2), Octadecahydrate; Cake Alum; Filter Alum; Papermaker's Alum; Alum; Dialuminum Trisulfate Octadecahydrate; Dialuminum Trisulfate Hydrate
EINECS	233-135-0

Quality Control

Our Aluminium Sulfate Octadecahydrate is manufactured under strict quality management systems. Production batches undergo rigorous analytical testing to ensure they meet precise specifications for purity, heavy metal content, and other critical parameters. Certificates of Analysis (COA) are provided with each shipment and are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive) and must be kept in original packaging or sealed containers to prevent caking and degradation from atmospheric moisture. Keep away from incompatible materials such as strong bases.

Specification

Item	Specification
Appearance	White crystalline lumps or powder
Identification (IR)	Conforms
Assay (Al2O3)	≥ 17.0 %
Iron (Fe)	≤ 0.01 %
Heavy Metals (as Pb)	≤ 10 ppm
Water Insoluble Matter	≤ 0.1 %
pH (5% Solution)	≥ 2.5

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.