Aluminum Sulfate

Basic Information of Aluminum Sulphate

CAS No.:	10043-01-3
EC No.:	233-135-0
Linear Formula:	Al₂(SO₄)₃ (anhydrous basis). Confirm the hydration state and composition of the requested grade.
Molecular Weight:	342.15 (as Al₂(SO₄)₃)
Appearance:	White crystalline solid (various forms: coarse powder, fine powder, granular, flakes). Solutions are typically colorless to pale yellow.
Melting point:	770 °C (dec.) (lit.)
Boiling point:	759.71°C (estimate)
Density:	2.71 g/mL at 25 °C (lit.)
Solubility:	Highly soluble in water, forming acidic solutions.
Requested physical form:	Specify the required solid form or solution concentration. Availability and packing must be confirmed for the proposed supply.
Nature:	on-combustible, non-explosive. Corrosive to some metals in the presence of moisture.
Transport review:	Request the current product-specific SDS. Confirm the UN number, proper shipping name, hazard class and packing group, where applicable, for the actual grade, packing and transport route before quotation or shipment.
Chemical Structure:

Primary Applications of Aluminum Sulfate

Aluminum Sulfate's properties as a coagulant, sizing agent, and chemical reactant make it an indispensable compound with widespread applications across numerous sectors:

1. Water and Wastewater Treatment:

   This is one of the most significant applications. Aluminum Sulfate acts as an effective coagulant and flocculant, removing suspended particles, turbidity, color, and heavy metals from raw water sources and municipal wastewater. It promotes the aggregation of impurities into larger flocs that can be easily settled or filtered, ensuring cleaner and safer water.

2. Paper Manufacturing:

   In the paper industry, Aluminum Sulfate is used as a sizing agent. It helps to improve the paper's water resistance, ink retention, and overall strength by promoting the retention of paper fibers and other additives.

3. Textile Industry:

   It is used as a mordant in dyeing and printing textiles. As a mordant, it helps dyes adhere better to fabric fibers, resulting in more vibrant and long-lasting colors.

4. Soil Treatment and Agriculture:

   Aluminum Sulfate can be used to lower the pH of alkaline soils, making them more suitable for acid-loving plants. It's also used in some agricultural pest control formulations.

5. Food Industry:

   In limited applications, it can be found as a firming agent in certain foods, and as a component in baking powder (as a leavening agent).

6. Other Industrial Uses:

   It finds application in the manufacture of catalysts, fire extinguishing foams, in leather tanning, and as a component in certain deodorants and astringents.

• GHS Classification: Corrosive (GHS05), Exclamation Mark (GHS07), Environmental Hazard (GHS09)

• Hazard Statements: Causes severe skin burns and eye damage; may cause respiratory irritation; harmful to aquatic life with long lasting effects.

• Transport classification: Request the current product-specific SDS and review the UN number, proper shipping name, hazard class and packing group, where applicable, for the actual grade, packing and route before quotation or shipment.