Product Description:

Aluminium sulfate is an inorganic salt compound with the chemical formula Al₂(SO₄)₃ (anhydrous) / Al₂(SO₄)₃·18H₂O (octadecahydrate), appearing as white crystalline powder, flake or granular solid with slight hygroscopy, easily soluble in water and insoluble in ethanol and acetone. Classified mainly into industrial grade and water treatment special grade, it features stable chemical properties, high purity, controllable impurities and excellent flocculation and precipitation performance. The product is easy to store and use, with customizable particle sizes and specifications, and is a widely used high-efficiency flocculant and industrial raw material, suitable for water treatment, papermaking, printing and dyeing, building materials and other multiple industrial fields.

Product Type：

By Water Content

1.      Anhydrous Aluminium Sulfate

2.      Aluminium Sulfate Octadecahydrate

By Grade

1.      Industrial Grade

2.      Water Treatment Special Grade

3.      Papermaking Special Grade

By Physical Form

1.      Solid Type: White crystalline powder/flake/granule

2.      Powder Type (fine/coarse)

Product Specifications ：

Basic Parameters

Molecular Formula: Al₂(SO₄)₃ (Anhydrous) / Al₂(SO₄)₃·18H₂O (Octadecahydrate)CAS No.: 10043-01-3 (Anhydrous) / 7784-31-8 (Octadecahydrate)Appearance: White crystalline powder/flake/granule, odorlessSolubility: Easily soluble in water (aqueous solution is acidic), insoluble in ethanol/acetoneHygroscopy: Slight, easy to agglomerate in humid environment

1. Aluminium Sulfate Octadecahydrate (Mainstream Specification)

Water Treatment Special Grade (Drinking Water Grade - Superior)

·       Al₂O₃ Content ≥: 17.0%

·       Iron (Fe) ≤: 0.005%

·       Insoluble Substances in Water ≤: 0.01%

·       PH Value (1% aqueous solution): 3.0~3.5

·       Heavy Metals (as Pb) ≤: 0.5mg/kg

·       Arsenic (As) ≤: 0.05mg/kg

·       Chloride (Cl⁻) ≤: 0.005%

·       Sulfate (SO₄²⁻): Complies with standard

Water Treatment Special Grade (Sewage Grade - First Class)

·       Al₂O₃ Content ≥: 16.8%

·       Iron (Fe) ≤: 0.01%

·       Insoluble Substances in Water ≤: 0.03%

·       PH Value (1% aqueous solution): 3.0~3.5

·       Chloride (Cl⁻) ≤: 0.01%

·       Heavy Metals (as Pb) ≤: 1.0mg/kg

Industrial Grade

·       Al₂O₃ Content ≥: 16.5%

·       Iron (Fe) ≤: 0.03%

·       Insoluble Substances in Water ≤: 0.05%

·       PH Value (1% aqueous solution): 2.8~3.5

·       Chloride (Cl⁻) ≤: 0.02%

·       Moisture Content ≤: 1.0%

Papermaking Special Grade

·       Al₂O₃ Content ≥: 16.9%

·       Iron (Fe) ≤: 0.008%

·       Insoluble Substances in Water ≤: 0.02%

·       PH Value (1% aqueous solution): 3.0~3.4

·       Whiteness ≥: 85%

·       Chloride (Cl⁻) ≤: 0.006%

·       No obvious agglomeration (good fluidity)

2. Anhydrous Aluminium Sulfate

Industrial Grade

·       Al₂O₃ Content ≥: 34.0%

·       Iron (Fe) ≤: 0.05%

·       Insoluble Substances in Water ≤: 0.08%

·       Moisture Content ≤: 2.0%

·       Chloride (Cl⁻) ≤: 0.03%

·       Appearance: White anhydrous powder/granule (low hygroscopic type optional)

High-purity Industrial Grade

·       Al₂O₃ Content ≥: 34.5%

·       Iron (Fe) ≤: 0.01%

·       Insoluble Substances in Water ≤: 0.02%

·       Moisture Content ≤: 1.0%

·       Chloride (Cl⁻) ≤: 0.008%

3. General Technical Requirements

·       Particle Size: Customizable (80-120 mesh powder, 2-5mm flakes/granules)

·       Stability: Stable under normal temperature and sealed storage, valid for 24 months

·       Storage Condition: Store in dry, ventilated warehouse, avoid moisture and rain

Application

Water Treatment Special Grade (Drinking Water/Sewage)

1.      Drinking Water Purification: High-efficiency flocculant for tap water and groundwater treatment, precipitates suspended solids, colloids, and impurities in water, improves water clarity, meets drinking water safety standards.

2.      Sewage & Wastewater Treatment: Used in municipal sewage, industrial wastewater (printing and dyeing, papermaking, chemical, food processing), flocculates and settles organic/inorganic pollutants, reduces turbidity, COD and BOD values; also for sludge dewatering to reduce sludge moisture content.

3.      Aquatic Water Purification: Flocculation and impurity removal for aquaculture ponds, landscape water and swimming pool water, maintains water transparency and water quality stability.

Papermaking Special Grade

1.      Papermaking Sizing: Core internal sizing agent for cultural paper, packaging paper and toilet paper, improves paper water resistance, oil resistance and printing adaptability, prevents ink penetration.

2.      Pulp Processing: Flocculant for pulp dewatering, accelerates water separation in pulp production, improves papermaking efficiency; also used for pulp bleaching auxiliary to enhance bleaching effect.

3.      Paper Coating: Additive for paper surface coating, improves coating adhesion and smoothness, enhances paper surface strength and glossiness.

Industrial Grade

1.      Printing & Dyeing Industry: Flocculant for printing and dyeing wastewater treatment, decolorizes and removes impurities; also as a mordant for textile dyeing, improves dye fixation fastness and fabric color fastness to washing/rubbing.

2.      Building Materials Industry: Additive for cement and concrete, adjusts setting time and strength; used in the production of fireproof materials and waterproof coatings as a gelling agent and stabilizer.

3.      Chemical Industry: Raw material for producing other aluminium compounds (e.g., aluminium hydroxide, aluminium oxide); catalyst and flocculant in chemical synthesis reactions; water treatment agent for industrial circulating water.

4.      Leather & Tanning Industry: Tanning agent for leather processing, promotes collagen cross-linking in leather, improves leather hardness, wear resistance and water resistance.

Other Industrial Applications

1.      Mining Industry: Flocculant for mineral processing wastewater, clarifies ore dressing water for recycling; also used in mineral flotation auxiliary to separate useful minerals from gangue.

2.      Agriculture: Soil amendment for acid soil improvement, adjusts soil pH value; foliar fertilizer additive for crops (cotton, wheat, fruits and vegetables) to supplement trace elements and promote growth (used in low dosage).

3.      Daily Chemicals: Additive for detergent and soap formulations, acts as a water softener to precipitate calcium and magnesium ions in hard water, improves cleaning effect; also used in the production of cosmetics as a thickener and stabilizer.

4.      Waste Gas Treatment: Adsorbent and flocculant for industrial waste gas desulfurization and denitrification, removes sulfur dioxide and nitrogen oxides in waste gas, reduces air pollution.