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General Chemistry
Aluminum Sulfate
Formula:
Al₂(SO₄)₃
GOST/CAS:
ГОСТ 12961-67 / CAS 10043-01-3
Aluminum sulfate (aluminum salt of sulfuric acid) is a highly effective inorganic coagulant that acts as a key agent for water purification, water treatment, and the precipitation of suspended particles in various technological processes. The product is available as a uniform, fine-crystalline powder, granules, or lumps of white color (in solid form), or as a clear solution with a grayish or greenish tint (in liquid form). It is highly soluble in water. Due to its superior coagulating properties, aluminum sulfate is indispensable in municipal services, as well as in the pulp and paper, textile, and chemical industries.
Applications
Water purification and treatment: Used as a primary coagulant for treating drinking water, industrial water, and wastewater. It effectively binds and precipitates fine suspended particles, turbidity, organic contaminants, and heavy metal salts, converting them into easily removable flakes (floc).
Pulp and paper industry: Used for sizing paper and cardboard (improving water resistance and tensile strength), retaining rosin sizes, fixing dyes, and improving the overall quality of the paper sheet.
Textile and leather industry: Used as a mordant in the dyeing of cotton, wool, and silk fabrics to ensure firm pigment fixation on fibers, as well as in leather tanning processes.
Construction and chemical synthesis: Included in concrete additives (as an accelerator for setting and hardening). Used in the production of other aluminum compounds, alums, catalysts, and as a water-repellent agent in construction mixtures.
Key Advantages
High coagulating capacity: Effectively and rapidly forms large flakes (floc) across a wide temperature range, ensuring deep water purification and rapid sediment settling.
Economic efficiency: One of the most classic, reliable, and cost-effective coagulants on the market, requiring minimal expenditure per unit volume of treated media.
pH versatility: Performs its functions stably within optimal acidity ranges; combines excellently with flocculants and other chemical components to intensify sedimentation processes.
Consistent quality: Strict compliance with standards ensures the predictability of technological processes, the absence of unwanted impurities, and guaranteed results on an industrial scale.
Storage & Transportation
- Store in dry, covered, and well-ventilated warehouse facilities in tightly sealed original packaging (protect from moisture and caking for solid forms; store in corrosion-resistant containers for liquid forms).
- When storing the liquid form, prevent the product from freezing (optimal temperature regime is above 0°C). For the solid product, avoid direct contact with moisture.
- Avoid storage in proximity to alkalis, strong oxidizing agents, and acids.
- Transportation is permitted by all types of covered vehicles in accordance with cargo transportation rules. The solid product is packed in multi-layer paper or polypropylene bags; the liquid product is shipped in specialized tankers or IBCs.
- Shelf life: 1 year from the date of production (provided packaging remains hermetically sealed).
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Technical Specifications
Appearance
White crystals, granules, or lumps / Clear liquid with a grayish or greenish tint
Mass fraction of Aluminum Oxide
≥ 16.0% (solid,high grade)/≥ 7.5%(liquid)
Mass fraction of water-insoluble residue
≤ 0.3% (solid)/ ≤ 0.1%(liquid)
Mass fraction of Iron (Fe)
≤ 0.02%
pH (5% aqueous solution)
2.5 – 4.0 (pronounced acidic reaction)
Density (at 20°C, for liquid)
1.28 – 1.33 g/cm³
Supply info
- For liquid form: Industrial plastic IBC containers (1000–1300 kg) or bulk delivery in tankers for large wholesale orders.
- For solid form: Classic moisture-proof polypropylene bags with polyethylene liners in 25 kg or 50 kg sizes, or soft big-bag (FIBC) containers of 1000 kg.