Aluminium sulphate

Aluminium sulphate

Aluminum sulphate; Filter alum; Cake alum; Papermaker's alum

CAS 10043-01-3

Chemical Formula Al2(SO4)3

Molecular Weight 342.15 g/mol

Aluminium sulphate is a white, crystalline solid widely used in water treatment, paper manufacturing, and dyeing processes. It acts as a coagulant to help remove impurities from water and is also used to improve paper quality and fix dyes in textiles. It is valued for its effectiveness, affordability, and versatility across various industries.

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Industrial Uses

1. Water Treatment

  • Coagulant: It is a key coagulant used in water treatment to remove impurities and improve water clarity. It works by neutralising the negative charge of suspended particles, causing them to clump together, which then settle or can be filtered out.

2. Pulp & Paper solutions

  • Sizing: It is used in conjunction with rosin soap in the sizing process, which controls the absorbency of the paper. It helps to create a barrier that reduces the paper's ability to absorb liquids, making it suitable for printing and writing.

3. Fabric solutions

  • Mordant: It is used in fabric solutions primarily as a mordant to improve dye adherence and create more vibrant colors. 
  • Dye fixer: It acts as a ""dye fixer"" by combining with the dye and fabric to prevent the dye from running when the fabric is wet.

4. Construction

  • Accelerator: is used in construction primarily as a setting accelerator for concrete and cement. It accelerates the hardening process, reducing the time it takes for concrete to reach its full strength. This is achieved by reacting with calcium hydroxide in the cement paste, forming aluminium hydroxide and calcium sulfate, which in turn accelerates the hydration process and strengthens the concrete.

5. Agrochemicals

  • Soil amendment: It is used primarily as a soil amendment to lower pH levels and improve nutrient absorption, making it suitable for plants that prefer acidic soils. It also plays a role in nutrient supply and enhancing soil structure, potentially improving drainage.

6. Animal healthcare

  • Ammonia reduction: Alum is added to litter in poultry houses and beef cattle feedlots to reduce ammonia emissions. Lower ammonia levels in poultry houses can lead to heavier birds, better feed conversion, and lower mortality.
  • Vaccine adjuvant: Aluminum salts, including alum, are commonly used as adjuvants in human and animal vaccines. Alum works by inducing antibody responses and facilitating a long-lasting protective immunity.
  • Leather Tanning: Aluminum sulfate is used in the tanning process to help preserve animal hides.

Specifications

Assay ≥ 98% (typical pharmaceutical grade)
Appearance White to off-white crystalline powder
Odor Odorless or faint characteristic odor
Boiling Point Not applicable (decomposes before boiling)
Melting Point 240 – 250 °C (with decomposition)
Density Approx. 1.3 g/cm³ (estimated)
Solubility Insoluble in water; soluble in acetone, ethanol
Viscosity Not applicable (solid)
Flash Point Not applicable (non-volatile solid)

Hazard Symbols

Irritants/Sensitisers/Other Hazards

FAQs

1. What is the current price of Aluminium sulphate in India?
The price of Aluminium sulphate can vary based on factors such as purity, quantity, etc. For the most accurate and competitive pricing, please contact us at +91.979 979 2121 directly for a customized quote tailored to your needs.

2. Where can I buy Aluminium sulphate in India?
You can purchase Aluminium sulphate from MULTICHEM, a leading importer with a reputation for quality and reliability. We provide convenient options for bulk orders and direct shipments across India. For more details on how to place an order, please visit our website or contact our sales team.

3. What is the minimum order quantity (MOQ) for Aluminium sulphate? 
Our minimum order quantity (MOQ) for Aluminium sulphate is designed to cater to both small-scale and large-scale needs. The MOQ depends on the packing size of the product which could range from 25 kg to 250kg.

4. How can I ensure the quality of Aluminium sulphate supplied by Multichem?
We adhere to stringent quality control processes to ensure that our products meet the highest standards of purity and effectiveness. They undergo rigorous testing and quality checks to guarantee that they comply with industry specifications. We provide a Certificate of Analysis (CoA) with every shipment to ensure transparency and quality assurance.