Potassium Bisulphate
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1. Product Details
Potassium Bisulphate (also written as Potassium Hydrogen Sulphate),Potassium Bisulfate is an inorganic acid salt belonging to the class of sulfate compounds.
Molecular Formula: KHSO₄
Molecular Weight: 136.17
CAS No.: 7646-93-7
Common Specifications: Industrial Grade (Purity ≥99%), Food Grade (Complies with GB 25592-2010 Standard)
Specification | Standard | Results |
| KHSO4 | ≥99% | 99.89% |
| Water Insoluble Matter | ≤0.05% | 0.017% |
| Fe | ≤0.003% | 0.0015% |
| Heavy Metal (PB) | ≤0.002% | 0.001% |
Specification Item | Content Requirement |
| Main Content (KHSO₄) | ≥99.0% |
| Chloride (Cl⁻) | ≤0.01% |
| Iron (Fe) | ≤0.002% |
| Heavy Metals (calculated as Pb) | ≤0.0005% |
| Arsenic (As) | ≤0.0001% |
| Moisture | ≤0.3% |
Storage Conditions
Store in a sealed, dry and well-ventilated place; avoid mixing with alkaline substances.
2. Physical Properties
Appearance and Character: White crystalline powder or granules, odorless, highly hygroscopic.
Melting Point: Approximately 214℃ (decomposes).
Solubility: Extremely soluble in water, exothermic when dissolved, aqueous solution is strongly acidic (pH≈1, 1% aqueous solution).
Density: Approximately 2.32 g/cm³ (20℃).
Stability: Stable at room temperature; decomposes at high temperatures to produce toxic gases (e.g., sulfur dioxide).
Corrosiveness: Strongly corrosive, irritating to skin, eyes and mucous membranes.
3. Main Applications
● Industrial Field:
Used as an acidic catalyst in organic synthesis reactions (e.g., ester preparation, dye synthesis); for metal surface treatment to remove oxide scales and rust; as a water treatment agent to adjust water pH, disinfect, and maintain swimming pool water quality.
● Agricultural Field:
Used as a soil amendment to improve alkaline soil and lower soil pH; as a foliar fertilizer or fertilizer additive to supplement potassium and sulfur required by crops and promote growth.
● Food Field (Food Grade):
Used as an acidulant and preservative in food processing to adjust taste and extend shelf life (e.g., beverages, canned foods, pastries, etc.).
● Other Fields:
Formulated into detergents and cleaners to enhance decontamination ability; used as an analytical reagent in chemical laboratories for acid-base titration or sample processing.
4. Packaging Specifications
Packaging specifications:
25kg outer plastic woven bag with inner lining bag
25kg kraft paper bag with inner lining
Note: Our standard packaging is 25kg woven bags. We also offer various custom packaging options (e.g., ton bags, full plastic bags, kraft paper bags, drums, etc.) based on customer needs, with different costs for different packages.
Note: According to customer needs, we also provide other packaging methods, such as ton bags, full plastic bags, kraft paper bags, and drums. Different packaging options correspond to different costs.
5. Core Advantages
● The core advantages of potassium bisulphate lie in its acidic functionality
practicality and safety, adapting to multi-scenario needs.
● Efficient and Controllable Acidity:
Strongly acidic aqueous solution with precise pH adjustment and fast reaction speed; more controllable corrosiveness than similar acidic reagents (e.g., sulfuric acid), easier to operate.
● Multi-Functional Integration:
Combines acid adjustment, disinfection, and nutrient supplementation (contains potassium and sulfur), eliminating the need for multiple reagents, reducing usage costs and operational complexity.
● High Stability:
Stable during storage at room temperature, not easily decomposed, long shelf life , low risks during transportation and storage.
● Environmentally Friendly and Low Residue:
Decomposes into potassium salts and sulfates after use, no toxic or harmful residues, environmentally friendly, compliant with environmental requirements in industrial, agricultural, food and other fields.
● Wide Applicability:
Strong cross-field adaptability from industrial catalysis, water treatment to agricultural soil conditioning and food processing; a single product meets multi-scenario needs.
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