Aluminum sulfate is an inorganic aluminum salt with the chemical formula Al2(SO4)3. It is a white crystalline compound that belongs to the family of post-transition metal sulfates and is highly soluble in water. It is found in both anhydrous and hydrated forms, with the hexadecahydrate (Alâ‚‚(SOâ‚„)₃·16Hâ‚‚O) and octadecahydrate (Alâ‚‚(SOâ‚„)₃·18Hâ‚‚O) being the most common. The anhydrous form is naturally occurring as the rare mineral millosevichite. The compound is thermally stable, non-combustible, and exhibits excellent coagulating and flocculating properties. It is also sometimes referred to as papermaker’s alum, although it differs chemically from true alums, which are double sulfate salts.Â
CAS No.: 10043-01-03
Synonyms: Dialuminum trisulfate, Aluminium sulfate anhydrous, Filter alum, Papermaker’s alum, aluminium salt
| Physical and Chemical Properties | |
| Chemical formula | Al2(SO4)3 |
| IUPAC Name | dialuminum;trisulfate |
| Molecular weight | 342.2 g/mol |
| Color | Colorless |
| Melting Point | 770 °C |
| Solubility | Soluble in water |
| Appearance | White crystalline solid |
| Density | 2.672 g/cm3 |
| Storage | Store in a cool, dry, and well-ventilated area |
| Pictograms : |  |
| Hazard Statements : | H290: May be corrosive to metals. H314: Causes severe skin burns and eye damage. H410: Very toxic to aquatic life with long-lasting effects |
| Precautionary statements : | P260: Do not breathe dust/fume/gas/mist/vapours/spray. P273: Avoid release to the environment. P280: Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/ …. P301+P330+P331 IF SWALLOWED: rinse mouth. Do NOT induce vomiting. P303+P361+P353: IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water or shower. P305+P351+P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P310: Immediately call a POISON CENTER/doctor. P390: Absorb spillage to prevent material damage.   |
Aluminum sulfate is an inorganic aluminum salt with the chemical formula Al2(SO4)3. It is a white crystalline compound that belongs to the family of post-transition metal sulfates and is highly soluble in water. It is found in both anhydrous and hydrated forms, with the hexadecahydrate (Alâ‚‚(SOâ‚„)₃·16Hâ‚‚O) and octadecahydrate (Alâ‚‚(SOâ‚„)₃·18Hâ‚‚O) being the most common. The anhydrous form is naturally occurring as the rare mineral millosevichite. The compound is thermally stable, non-combustible, and exhibits excellent coagulating and flocculating properties. It is also sometimes referred to as papermaker’s alum, although it differs chemically from true alums, which are double sulfate salts.Â
CAS No.: 10043-01-03
Synonyms: Dialuminum trisulfate, Aluminium sulfate anhydrous, Filter alum, Papermaker’s alum, aluminium salt
| Physical and Chemical Properties | |
| Chemical formula | Al2(SO4)3 |
| IUPAC Name | dialuminum;trisulfate |
| Molecular weight | 342.2 g/mol |
| Color | Colorless |
| Melting Point | 770 °C |
| Solubility | Soluble in water |
| Appearance | White crystalline solid |
| Density | 2.672 g/cm3 |
| Storage | Store in a cool, dry, and well-ventilated area |
| Pictograms : | |
| Hazard Statements : | H290: May be corrosive to metals. H314: Causes severe skin burns and eye damage. H410: Very toxic to aquatic life with long-lasting effects |
| Precautionary statements : | P260: Do not breathe dust/fume/gas/mist/vapours/spray. P273: Avoid release to the environment. P280: Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/ …. P301+P330+P331 IF SWALLOWED: rinse mouth. Do NOT induce vomiting. P303+P361+P353: IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water or shower. P305+P351+P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P310: Immediately call a POISON CENTER/doctor. P390: Absorb spillage to prevent material damage.   |
Aluminium sulfate’s applications are primarily used in water purification, wastewater treatment, paper production, textile dyeing, building materials, fire-fighting foams, battery technology, and solar cell research.
No. Although aluminium sulfate is sometimes referred to as papermaker’s alum, true alum generally refers to double sulfate salts such as potassium alum or ammonium alum.
Aluminium sulfate is better known as papermaker’s alum in the paper industry. But alum is more properly used in the case of double sulfate salts.
Aluminium sulphate is highly soluble in water, and is therefore a good coagulant and flocculant for water treatment processes.
Aluminium sulfate is used in water treatment chemicals, paper-making products, textile processing chemicals, construction materials, firefighting foams and some food processing formulations.
It acts as a coagulant and flocculant. It neutralizes the charge on suspended particles so that the impurities can form larger flocs which can then be removed by sedimentation and filtration.
