Non Ferric Alum

Non-ferric alum is a high-purity form of aluminium sulfate  that is free from iron impurities.

It is used as a coagulant and flocculant in water treatment, paper sizing, and various industrial applications where colorless, high-purity alum is required.

Appearance & Form

Solid (Lumps/Slabs/Crystals): White to off-white

Solution: Clear, colorless to slightly cloudy liquid

Key Properties

Parameter             Typical Range

Al₂O₃ Content       ≥ 17% (solid), 7–8% (liquid)

Iron Content (as Fe)            ≤ 0.005%

pH (1% solution) 2.5 – 3.5

Solubility               Fully soluble in water

Appearance          White, free from visible impuritie

Applications

Water & Wastewater Treatment

Coagulation of suspended particles for clear water

Removes turbidity, organic matter, and microorganisms

Paper Industry

Sizing agent in paper manufacturing – improves ink absorption and print quality

Textile & Leather

Dye fixing agent in textiles

Tanning agent in leather processing

Other Uses

Soap manufacturing

Fireproofing of fabrics

Deodorizing and purification processes

Advantages Over Ferric Alum

Does not impart yellow/brown color to treated water or paper pulp

Higher purity → better suited for applications needing colorless product

Low iron content prevents staining

Handling & Storage

Store in a cool, dry place away from moisture

Use corrosion-resistant containers for liquid form

Avoid contact with skin and eyes — mildly acidic in nature