Alum Lumps (Potash Alum or Ammonium Alum)

Alum Lumps are white, translucent crystalline double sulfates—typically Potassium Alum [KAl(SO4)2.12H2O] or Ammonium Alum [NH4Al(SO4)2.12H2O]. These highly soluble solids are primarily used for water purification as a coagulant, as a textile mordant, in paper making and as a natural styptic/deodorant due to astringent properties.

Alum Types:

Potash Alum [KAl(SO4)2.12H2O]: This is considered the standard form, this is frequently used in medicine and cosmetics (e.g., aftershave blocks) for its antiseptic properties.

Ammonium Alum [NH4Al(SO4)2.12H2O]: It is known as a common ingredient in deodorants and antiperspirants and often used in industrial water treatment, it is an inexpensive, non-toxic compound.

Alum Lumps (Fitkari): These solid, translucent chunks are easily dissolved in water and are widely used in industrial and home applications.

Applications of Alum Lumps (Potash Alum or Ammonium Alum):

Alum Lumps (Potash or Ammonium Alum) are versatile, white crystalline compounds primarily used for water purification, as astringents in personal care (styptic pencils/deodorants) and as industrial mordants for dyeing fabrics. They function as coagulants to remove impurities, reduce sweating, tighten skin and helps in tanning and paper manufacturing.

Differences in Usage: 

Potash Alum [KAl(SO4)2.12H2O]: It is often preferred for cosmetic uses, shaving and therapeutic applications (e.g., gum disease).

Ammonium Alum [NH4Al(SO4)2.12H2O] : It is heavily utilized in industrial water treatment, sizing paper and in the tanning industry.

Water Purification and Treatment: Acting as a flocculant/coagulant, alum binds with suspended particles and contaminants, making them settle to the bottom. It is widely used to treat wastewater, swimming pool water and for purifying drinking water.

Personal Care and Cosmetics:

• Styptic Pencils: It is used to stop minor bleeding from shaving cuts due to their astringent (blood-clotting) properties.

• Natural Deodorant: It is applied to the underarms to reduce sweating and inhibit odor-causing bacteria.

• Aftershave: It acts as a disinfectant to soothe skin irritation.

Industrial Applications:

• Textile Dyeing: It is used as a mordant to fix dyes onto fabrics, improving colorfastness and durability.

• Paper Manufacturing: It is  used as a sizing agent to increase paper strength and water resistance.

• Leather Tanning: It is used in the treatment and processing of leather.

Household and Other Uses:

• Food Processing: It is used in pickling to keep vegetables crisp and in baking powder as an acidic component.

• Gardening: It is used to enhance flowering in certain plants and as an eco-friendly pest control agent.

• Fireproofing: It is employed in the production of fireproof textiles.

Alum Lumps (Potash Alum / Ammonium Alum) – Product Specifications:

• Chemical Name: Potash Alum / Ammonium Alum

• Common Names: Alum Lumps, Fitkari

• Chemical Formula:

• Potash Alum: KAl(SO₄)₂·12H₂O

• Ammonium Alum: NH₄Al(SO₄)₂·12H₂O

• Molecular Weight: ~474.39 g/mol (Potash Alum)

• CAS Number:

• Potash Alum: 7784-24-9

• Ammonium Alum: 7784-26-1

• HSN Code: 28332990

• Appearance: White to translucent crystalline lumps

• Odor: Odorless

• Solubility: Soluble in water

• pH (1% Solution): 3.0 – 4.5

• Nature: Astringent and coagulating agent

• Quality Specifications:

(Based on Commercial Grade Alum Lumps)

• Assay: 98% – 99% Min

• Al₂O₃ Content: 10% – 11%

• Iron (Fe): 0.01% Max

• Water Insoluble Matter: 0.05% Max

• Chloride (Cl): 0.01% Max

• Heavy Metals (as Pb): 10 ppm Max

• Grades Available: Industrial Grade, Water Treatment Grade, Cosmetic Grade & Pharma Grade.

Packaging: 50 Kg. Bag

MOQ: 50 Kg.