Aluminum Sulfate CAS#10043-01-3
High Solubility: Aluminum sulfate exhibits good solubility in water and is practically insoluble in ethanol and most organic solvents, supporting its wide application in aqueous treatment systems.
Stable pH: The 10% aqueous solution of this compound maintains a pH range of 3.0–4.0 at 25°C, and it remains relatively stable under moderate heating conditions.
Versatile Uses: It acts as a coagulant for drinking water and wastewater treatment, a sizing agent in papermaking, and a soil conditioner for acidic adjustment in agriculture.
Crystalline Form & Hygroscopic Nature: This material is provided as a white crystalline solid with slight hygroscopic tendencies, suitable for industrial operations requiring precise weighing and sealed storage.
Aluminum sulfate, characterized by the molecular formula Al₂(SO₄)₃, presents as an odorless white crystalline solid. It is freely soluble in water (31.2 g/L at 20°C), and insoluble in ethanol. A 10% aqueous solution of this compound maintains a pH of 3.0–4.0. The substance possesses irritant characteristics and is utilized as a water treatment coagulant, paper sizing agent, and tanning auxiliary in leather processing.
Aluminum Sulfate Chemical Properties
| Item | Specification |
|---|---|
| Melting point | 770 °C (decomposes)(lit.) |
| Density | 2.71 g/cm³ |
| Refractive index | 1.47 |
| Storage temp | Store below +30°C |
| Solubility | Soluble in water; insoluble in ethanol |
| Form | Crystal / Powder |
| Color | White |
| Odor | Odorless |
| PH Range | 3.0–4.0 (100 g/l, H₂O, 20℃) |
| Water Solubility | 31.2 g/L (20 º C) |
| Sensitive | Slightly hygroscopic |
| Stability | Stable under normal conditions. Incompatible with strong bases |
| InChIKey | DIZPMCHEQGEION-UHFFFAOYSA-H |
| CAS DataBase Reference | 10043-01-3 (CAS DataBase Reference) |
| NIST Chemistry Reference | Aluminum sulfate (10043-01-3) |
| EPA Substance Registry System | Sulfuric acid, aluminum salt (10043-01-3) |
Safety Information
| Item | Specification |
|---|---|
| Hazard Codes | Xi |
| Risk Statements | 36/37/38 |
| Safety Statements | 26-36 |
| WGK Germany | 1 |
| RTECS | BD1700000 |
| TSCA | Yes |
| HS Code | 28332200 |
This compound is employed as a flocculant for industrial sewage purification, a flame retardant additive for textiles, and a raw material for manufacturing alum. It also functions as a pH regulator in swimming pool water, a mud adjusting agent in oilfield, and a precipitant in dyeing industry. Additionally, it finds application as a decolorizing agent, concrete waterproofing agent, and raw material for producing other aluminum compounds.
