Description
Product Name: Potassium Alum
Chemical Name: Aluminum Potassium Sulfate Dodecahydrate
Molecular Formula: KAl(SO₄)₂·12H₂O
Molecular Weight: 474.39
CAS No.: 7784-24-9
Appearance: Colorless transparent crystals / white crystalline powder or granules
Features: High purity, low impurity, good solubility, stable performance
Parameter
Food Grade
| Item | Specification |
| Aluminum potassium sulfate [KAl(SO₄)₂·12H₂O] (dry basis), ω/% | ≥99.5 |
| Lead (Pb) content / (mg/kg) | ≤5.0 |
| Arsenic (As) content / (mg/kg) | ≤2.0 |
| Selenium (Se) content / (mg/kg) | ≤30.0 |
| Fluorine (F) content / (mg/kg) | ≤30.0 |
Industrial Grade
| Item | Superior Grade | First Grade | Qualified Grade |
| Aluminum potassium sulfate [KAl(SO₄)₂·12H₂O] (dry basis), % ≥ | 99.2 | 98.6 | 97.6 |
| Iron (Fe) (dry basis), % ≤ | 0.01 | 0.01 | 0.05 |
| Heavy metals (as Pb), % ≤ | 0.002 | 0.002 | 0.005 |
| Arsenic (As), % ≤ | 0.0002 | 0.0005 | 0.001 |
| Water-insoluble matter, % ≤ | 0.2 | 0.4 | 0.6 |
| Moisture, % ≤ | 1.0 | 1.5 | 2.0 |
Main Applications
- Water Treatment: High-efficiency water purification flocculant. Hydrolyzes to form aluminum hydroxide colloid, adsorbs suspended solids and colloidal impurities in water, and clarifies water rapidly.
- Food Processing: Food additive (leavening agent, stabilizer) used in fried foods (fried dough sticks, fried dough twists), starch noodles, vermicelli, sheet jelly, and marinated aquatic products such as jellyfish.
- Industrial Applications: Paper sizing agent, printing and dyeing mordant, leather tanning agent, coating clarifier, wood flame retardant, raw material for daily chemical antiperspirants.
- Pharmaceutical Field: External astringent and hemostatic agent for eczema, skin itching, and minor wound hemostasis.
Advantages
- High purity, low impurities, stable performance
- Good solubility
- Available in block, granular, and powder forms
- Support customized packaging, OEM, and provision of COA & MSDS
- Sufficient stock, fast delivery, support sea / land / intermodal transportation
Packaging & Storage
Standard Packaging
25kg PP bag / kraft paper bag with inner moisture-proof bag
Customization
50kg, 1000kg jumbo bag, export neutral packaging
Storage
Cool, dry, ventilated, moisture-proof, avoid acids and alkalis
Transportation
Transport as general chemical product, non-toxic and harmless
Service & Cooperation
- Provide samples, COA, MSDS, and customs declaration documents
- Support small-batch trial orders and large-volume long-term supply
- Support factory inspection and third-party testing
- Professional foreign trade team: one-stop service from quotation → contract → production → quality inspection → delivery → after-sales
