Product Feature
Aluminum sulfate is a white powder, flakes or granular. Soluble in water, acids, and bases, but not in ethanol. The aluminum sulfate liquid is acidic. After hydrolysis, aluminum hydroxide is formed. Aluminum hydroxide is mainly used as water treatment chemical. Besides, it is also used as the precipitant of rosin gum, wax emulsion and other rubber materials in the paper industry; Can also be made foam fire extinguisher retention agent, manufacturing alum, aluminum white raw materials, oil decolorization, deodorant, some drugs raw materials, etc.
Performance Parameter
| Parameter | Specification / Performance |
|---|---|
| Appearance | White crystalline powder, flakes, or granules |
| Chemical Formula | Al₂(SO₄)₃·18H₂O |
| Molecular Weight | 666.43 g/mol (for hydrated form) |
| Solubility | Soluble in water, acids, and alkalis; insoluble in ethanol |
| pH (1% Solution) | 2.5 – 3.5 (acidic nature) |
| Al₂O₃ Content | ≥ 15% (for solid grade) / ≥ 7.8% (for liquid grade) |
| Fe Content (as Fe) | ≤ 0.005% |
| Insoluble Matter | ≤ 0.1% |
| Density (Liquid Form) | 1.30 – 1.35 g/cm³ |
| Hydrolysis Product | Aluminum Hydroxide [Al(OH)₃] |
| Stability | Stable under normal temperature and pressure; hygroscopic |
| Working Temperature Range | Effective from ambient up to 60 °C |
| Storage Condition | Store in a cool, dry, well-ventilated place; avoid moisture |
| Main Function | Coagulation, flocculation, and precipitation agent |
Packing:
Main Application
Main Applications of Aluminum Sulfate:
Aluminum sulfate is extensively used across various industries due to its strong coagulating and precipitating properties. In the water and wastewater treatment sector, it serves as an efficient coagulant and flocculant for removing suspended solids, organic matter, and impurities, forming aluminum hydroxide flocs that help clarify water. In the paper and pulp industry, it acts as a precipitant and sizing agent for rosin and wax emulsions, improving paper strength, whiteness, and print quality. Within the textile industry, aluminum sulfate is used as a mordant during dyeing and printing processes to fix dyes onto fabrics and enhance color fastness.
In chemical manufacturing, it serves as a raw material for the production of alum, aluminum hydroxide, and other aluminum-based compounds. It is also applied in firefighting agents, particularly in foam-type fire extinguishers, as a stabilizing and retention agent. In the petroleum and oil refining industry, aluminum sulfate functions as a decolorizing and deodorizing agent to remove unwanted impurities and odors. The construction industry utilizes it as a setting accelerator in concrete and as a component in waterproofing materials.
Additionally, in the pharmaceutical and cosmetic sectors, it is used in deodorants, astringents, and certain medicinal formulations. In leather tanning, it aids in the tanning and pickling process, improving the softness and finish quality of hides. Lastly, in agriculture, aluminum sulfate is applied to reduce soil pH, making it more suitable for acid-loving plants such as hydrangeas and azaleas.
Faqs
A white crystalline solid (Al₂(SO₄)₃), soluble in water, odorless. It is a common coagulant with strong water purification ability and stable chemical properties.
- Water treatment (coagulant for drinking water/sewage); 2. Papermaking (sizing agent, retention aid); 3. Textile industry (mordant); 4. Construction (waterproofing agent, concrete additive); 5. Soil improvement (acidifies alkaline soil).
- Purity grade: Industrial-grade (≥98%), food-grade (≥99.5%); 2. Crystal form: Anhydrous type, octadecahydrate type; 3. Application: Water treatment-grade, papermaking-grade, food-grade.
1. Water purification: 20-50mg/L dosage, mix with water and add to raw water; 2. Papermaking: Add 1-3% to pulp, stir evenly; 3. Soil improvement: 50-100kg/acre, spread and plow into soil.
- Cool, dry, ventilated place (≤30℃); 2. Sealed to prevent moisture and caking; 3. Store separately from alkalis, oxidants; 4. Keep away from children, food.
React bauxite/kaolin with sulfuric acid; 2. Filtration to remove impurities; 3. Concentration, crystallization; 4. Drying, crushing, inspection, packaging.
Wear gloves/goggles; rinse with water if skin/eye contact; 2. Do not mix with alkalis; 3. Avoid dust inhalation; operate in ventilation; 4. Dispose of waste as industrial solid waste.
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