Alum is a group of hydrated double sulfates of aluminum and other elements such as potassium or ammonium. It is widely used in water treatment, food processing, cosmetics, and pharmaceuticals. Below are the general specifications for different types of alum: Common Types of Alum: 1. Potassium Alum (KAl(SO)12O) - Used in water purification, food, and cosmetics 2. Ammonium Alum (NHAl(SO)12HO) - Used in industrial and water treatment applications 3. Sodium Alum (NaAl(SO)12HO) - Used in food processing and baking powder 4. Ferric Alum (FeAl(SO)12HO) - Used in water treatment and paper manufacturing Physical Properties: Appearance: White, transparent crystalline solid or powder Color: White or colorless (can be slightly yellow in ferric alum) Odor: Odorless Taste: Astringent and slightly sweet Solubility: Soluble in water, insoluble in alcohol pH (10% Solution): 3.0 - 4.0 Chemical Composition & Purity: AlO (Aluminum Oxide): 15-18% SO (Sulfate Content): 50-55% FeO (Iron Oxide) (For Non-Ferric Alum): Max 0.01% Water Insoluble Matter: Max 0.1% Moisture Content: Max 5% Purity: Min 99% Microbiological Standards (For Food & Cosmetic Grade Alum): Total Plate Count: Max 10,000 CFU/g Yeast & Mold: Max 100 CFU/g Coliforms:
Alum powder is a fine, white crystalline powder derived from aluminum sulfate compounds. It is widely used in water purification, food processing cosmetics, pharmaceuticals, and industrial applications. Below are the general specifications for alum powder: Types of Alum Powder: 1. Potassium Alum Powder (KAl(SO)12HO) - Used in food, water treatment, and cosmetics 2. Ammonium Alum Powder (NHAl(SO)·12HO) - Used in industrial and textile applications 3. Sodium Alum Powder (NaAl(SO)12HO)-Used in baking powder and food processing 4. Ferric Alum Powder (FeAl(SO)12HO)- Used in water treatment and paper industries Physical Properties: Appearance: Fine, free-flowing powder Color: White or colorless (ferric alum may appear yellowish) Odor: Odorless Taste: Astringent and slightly sweet Mesh Size: 80-200 mesh (as per requirement) Solubility: Fully soluble in water Insoluble in alcohol pH (10% Solution): 3.0 - 4.5 Chemical Composition & Purity: AlO (Aluminum Oxide): 15-18% SO(Sulfate Content): 50-55% FeO (Iron Oxide) (For Non-Ferric Alum): Max 0.01% Water Insoluble Matter: Max 0.1% Moisture Content: Max 5% Purity: Min 99% Microbiological Standards (For Food & Cosmetic Grade Alum Powder): Total Plate Count: Max 10,000 CFU/g Yeast & Mold: Max 100 CFU/g Coliforms:
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