Chemical laboratory

Aluminum Sulfate Hydrate

Industrial Coagulant for Water Treatment & Manufacturing

  • CAS 10043-01-3
  • Formula Al₂(SO₄)₃·xH₂O
  • Flash Pt N/A °C
  • Density 1.69 g/cm³ (for Al₂(SO₄)₃·18H₂O)
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Physical & Chemical Properties

Property Value Unit
Boiling point Decomposes before boiling °C
Flash point N/A °C
Density 1.69 g/cm³ (for Al₂(SO₄)₃·18H₂O) g/cm³
Solubility 87.0 g/100 mL (0°C) -
Ph 3.0-3.5 (1% solution) -
Molecular weight 666.43 g/mol (Al₂(SO₄)₃·18H₂O) g/mol
Melting point N/A °C
Vapor pressure N/A mmHg
Autoignition temp N/A -
Appearance White crystalline solid -
Odor Odorless -
Vapor density N/A g/cm³

Overview

Aluminum Sulfate Hydrate (Al₂(SO₄)₃·xH₂O) is a white, odorless crystalline compound widely used as an industrial coagulant and flocculent. This highly soluble inorganic salt forms acidic solutions and serves as a critical component in water purification, paper manufacturing, and various industrial processes. With its excellent coagulation properties and versatile applications, aluminum sulfate hydrate is an essential chemical for municipal water treatment facilities, paper mills, and manufacturing operations requiring effective particle removal and pH control.

Key Applications

  • Water Treatment: Primary coagulant for removing suspended particles, turbidity, and organic matter from drinking water and wastewater through flocculation processes
  • Paper Manufacturing: Acts as a sizing agent to improve paper strength, reduce ink penetration, and enhance print quality in papermaking operations
  • Industrial Processing: Used as a mordant in textile dyeing operations and as a tanning agent in leather production for improved color fastness and material properties
  • Soil Treatment: Effective pH adjustment agent for alkaline soils, helping optimize growing conditions for acid-loving plants

Safety & Handling

Aluminum sulfate hydrate is non-flammable with no flash point or autoignition temperature concerns. However, proper safety precautions should be observed during handling. Wear appropriate personal protective equipment including safety glasses, gloves, and dust masks to prevent inhalation or skin contact. Ensure adequate ventilation in work areas to minimize dust exposure. The compound forms acidic solutions that can cause irritation, so immediate washing with water is recommended after any contact with skin or eyes.

Storage & Shelf Life

Store aluminum sulfate hydrate in a cool, dry location away from moisture and incompatible materials such as strong bases and reactive metals. Use sealed containers made of corrosion-resistant materials to prevent contamination and maintain product integrity. The compound has excellent shelf stability when stored properly in original packaging. Keep away from aluminum and steel containers in the presence of moisture to prevent corrosion reactions.

Why Alliance Chemical

Alliance Chemical provides reliable supply of high-quality Aluminum Sulfate Hydrate with same-day shipping available from our Taylor, Texas facility. We offer flexible shipping options including UPS, LTL, and FTL to meet your delivery requirements. Every order includes comprehensive Safety Data Sheets (SDS) and Certificates of Analysis (COA) to ensure compliance and quality assurance for your operations.

Shipping & Availability

Parcel Shipping

UPS Ground supports pints, quarts, and most 1-gallon packages nationwide.

LTL Freight

5-gallon pails, drums, and totes move via LTL carriers such as ABF Freight, SEFL, Saia, and XPO.

Full Truckload

FTL available for palletized bulk orders. Competitive freight rates.

Local Pickup

Same-day pickup at our Taylor, TX warehouse for Texas customers.

SDS, COA, and TDS available for every product • Same-day shipping on orders before 1 PM CT

Frequently Asked Questions

What is aluminum sulfate hydrate and what is it used for?
Aluminum sulfate hydrate is the hydrated form of aluminum sulfate commonly supplied as a crystalline solid or aqueous solution; it acts as an acidic inorganic salt. It is used industrially as a coagulant/flocculant in water and wastewater treatment, in paper sizing, textiles, dyeing, leather processing, and as a laboratory reagent.
How should I store aluminum sulfate hydrate and what is its shelf life?
Store in a cool, dry, well-ventilated area in tightly closed original containers away from moisture and strong bases; keep off floors and away from incompatible materials. In dry, unopened packaging the solid is stable for years; aqueous solutions have shorter shelf life and should be monitored for precipitation or microbial growth.
What are the main safety and handling precautions for aluminum sulfate hydrate?
Avoid inhalation, ingestion and contact with eyes or skin; use appropriate PPE (gloves, goggles, respiratory protection for dust) and local exhaust ventilation. In case of contact, flush with water and consult the Safety Data Sheet (SDS) for first-aid and spill-response procedures.
What do concentration differences mean and how do I choose the right grade?
Aluminum sulfate hydrate is supplied as solids (various hydration states) and aqueous solutions with differing percent active content; grades include technical, industrial, and reagent/purity grades. Choose based on application requirements—higher-purity grades for laboratory use and specified active concentration for process dosing—consult product TDS for recommended concentrations.
What documentation is available for aluminum sulfate hydrate?
Standard documentation includes a Safety Data Sheet (SDS), Certificate of Analysis (COA), and a Technical Data Sheet (TDS) detailing composition, physical properties, and handling instructions. Manufacturers can also provide transport documents, packaging specifications, and regulatory or quality certificates on request.
How is aluminum sulfate hydrate shipped and what packaging options are common?
Shipping classification depends on local/regional transport regulations and product form; solids and dilute solutions are commonly non-hazardous but check the SDS for specific transport status. Typical packaging options include small bags (25 kg), bulk bags (500–1000 kg), drums, and intermediate bulk containers (IBCs) for liquids.
Which materials is aluminum sulfate hydrate compatible or incompatible with?
It is generally compatible with plastics like polyethylene and many stainless steels when dry or in dilute solution, but it is acidic and can corrode carbon steel or reactive metals in the presence of moisture. Avoid mixing with strong alkalis, sulfides, or materials that generate heat or hazardous gases on contact; evaluate compatibility with your system before use.
What are the typical technical specifications for aluminum sulfate hydrate?
Typical specs include appearance (white to pale crystalline solid), solubility in water, assay/purity expressed as percent active content, moisture/hydration level, and pH of aqueous solutions (acidic). Exact values vary by grade and supplier, so review the product COA/TDS for specification details.
Which industries and applications commonly use aluminum sulfate hydrate?
Common industries include municipal and industrial water and wastewater treatment, pulp and paper, textiles and dyeing, leather tanning, ceramics and pigments, and laboratory/analytical settings. It is primarily used where an acidic aluminum salt is needed for coagulation, pH adjustment, or chemical processing.
How can I buy aluminum sulfate hydrate and what should I ask suppliers?
Aluminum sulfate hydrate is available from chemical distributors in small to bulk quantities and by grade (technical, industrial, reagent); lead times depend on order size and location. When purchasing, request the SDS, COA, TDS, recommended storage/handling guidance, packaging options, and any regulatory or transportation information relevant to your region.

Documentation & Downloads

Safety Data Sheet
SDS / MSDS
Request COA
Certificate of Analysis
Technical Data Sheet (TDS)
Available for all products

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