Other Names:
Potassium Sulphate, Dipotassium Sulfate, Sulphate of Potash, Arcanite, Sulfuric Acid Dipotassium Salt, K₂SO₄
Specification Summary
- Purity: ≥99.0% (Technical/Food Grade), up to 99.9% (High Purity)
- Form: White crystalline powder or granules
- CAS No.: 7778-80-5
- Molecular Formula: K₂SO₄
- Molecular Weight: 174.26 g/mol
Product Description
Potassium Sulfate is a white, odorless, non-hygroscopic crystalline solid with excellent flow properties. It is highly soluble in water (110 g/L at 20°C), forming a neutral to slightly acidic solution (pH 5.5–7.5 for 0.5M solution). The compound is non-corrosive, stable under normal conditions, and non-flammable. Its chloride-free composition makes it ideal for chloride-sensitive crops and a wide range of industrial applications.
Potassium Sulfate Specification Table
| Property | Specification / Value |
| Chemical Name | Potassium Sulfate |
| Other Names | Dipotassium Sulfate, Sulphate of Potash |
| CAS Number | 7778-80-5 |
| Molecular Formula | K₂SO₄ |
| Molecular Weight | 174.26 g/mol |
| Appearance | White crystalline powder/granules |
| Purity (K₂SO₄) | ≥99.0%–99.9% |
| Density | 2.66 g/cm³ |
| Melting Point | 1,069°C |
| Boiling Point | 1,689°C |
| Solubility in Water (20°C) | 110 g/L |
| pH (0.5M Solution, 25°C) | 5.5–7.5 |
| Potassium Oxide (K₂O) | ≥50% |
| Sulfur Trioxide (SO₃) | ≥42.5% |
| Chloride (Cl⁻) | ≤2.0% |
| Moisture Content | ≤0.5% |
| Total Metal Impurities | ≤1.0% |
Downloadable TDS
A comprehensive Technical Data Sheet (TDS) is available, providing detailed chemical, physical, and safety information, as well as handling, storage, and regulatory compliance guidelines.
Application Sectors and Industries of Potassium Sulfate
Agriculture and Fertilizers
Potassium Sulfate is a premium, chloride-free potash fertilizer supplying both potassium and sulfur, essential for plant growth. It is especially beneficial for chloride-sensitive crops such as tobacco, fruits, vegetables, and potatoes, improving yield, quality, and resistance to drought and disease.
Specialty Glass Manufacturing
Used as a flux in specialty glass and ceramics production, potassium sulfate enhances clarity, strength, and thermal stability. It helps reduce melting temperatures and improves the homogeneity of the final product.
Food Industry
Compliant with FCC and E515 standards, potassium sulfate serves as a firming agent, acidity regulator, and carrier for food additives. It is used in food supplements and processing to maintain product consistency and quality.
Pharmaceutical Industry
Potassium sulfate is utilized in various pharmaceutical formulations and as a raw material for synthesizing potassium-based compounds. Its high purity and low impurity content are critical for medicinal applications.
Detergents and Cleaning Products
Acts as a builder and water softener in powdered detergents, enhancing cleaning efficiency and preventing scale formation in washing machines and industrial cleaners.
Water Treatment
Used to adjust water hardness and as a nutrient source in biological wastewater treatment. Potassium sulfate helps maintain the ionic balance in water systems.
Paper and Pulp Industry
Employed in the production of potassium alum, which is essential for paper sizing and improving the brightness and quality of paper products.
Construction Materials
Added to gypsum cement and plasterboard formulations to improve strength, set time, and durability. It is also used in specialty concretes and mortars.
Explosives and Pyrotechnics
Functions as a flash suppressant in propellant charges and a component in pyrotechnic mixtures, reducing muzzle flash and enhancing safety in explosives.
Abrasives and Ceramics
Used in the manufacture of abrasives, ceramics, and refractory materials, potassium sulfate improves product performance and process efficiency.
Packaging Types
- 25 kg Polyethylene or Paper Bags:
Moisture-resistant, sealed bags suitable for manual handling and small-scale agricultural or industrial applications. - 50 kg Multi-Wall Paper Bags:
Heavy-duty, lined bags for bulk users in fertilizer, construction, or glass industries. - 1,000 kg Jumbo Bags (FIBCs):
Flexible Intermediate Bulk Containers for efficient storage and transport in large-scale manufacturing or export operations. - Bulk Tankers:
Used for direct delivery to major industrial customers, ensuring product integrity and minimizing contamination. - Custom Packaging:
Available for food, pharmaceutical, or high-purity requirements, including tamper-evident and lined options.
For detailed product specifications, safety data, and regulatory compliance, please download the Technical Data Sheet (TDS) or contact our technical support team
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