High Purity Potassium Aluminum Sulfate Crystal for Water Treatment, Personal Care and Industrial Applications
Product Overview
KolinSC supplies block potassium alum for water treatment and a range of industrial applications. Block potassium alum, also known as potassium aluminum sulfate, has the chemical formula KAl(SO₄)₂·12H₂O. This traditional double sulfate crystal contains potassium, aluminum and sulfate ions. For centuries, people have used potassium alum as an astringent and clarifying agent. Today, manufacturers also use it in suitable water treatment, leather, textile, paper and personal care applications.
We produce block potassium alum through controlled crystallization to achieve a clear, glass-like appearance and consistent product quality. In addition, the block form offers convenient handling during storage and sea freight. It dissolves in water to prepare an alum solution for suitable applications. For example, water treatment plants can evaluate it for coagulation, while leather and textile manufacturers may use it in their respective processes. Personal care manufacturers can also evaluate suitable grades as raw materials for crystal deodorant stones and other formulations.
The appropriate grade depends on the intended application, required purity and applicable regulations. Therefore, buyers should review the relevant technical specifications before placing an order.
Block Potassium Alum Crystals
Block potassium alum crystals with a clear, glass-like appearance and distinctive crystalline structure. Potassium alum (KAl(SO₄)₂·12H₂O) is used in various industrial applications, including water treatment, textile processing, leather tanning and other suitable applications.
Potassium Alum Solution in a Glass Beaker
A transparent aqueous solution prepared from potassium alum crystals (KAl(SO₄)₂·12H₂O) in a glass beaker. Potassium alum dissolves in water and can be used as a coagulant in suitable water treatment processes. Actual dissolution and treatment performance depend on solution concentration and operating conditions.
Key Specifications Summary
Core Technical Parameters for Quick Screening
| Item | Specification |
| Appearance | Colourless / transparent glassy block crystal |
| Al2O3 Content | 【10.5% – 11.0%】 |
| Fe Content | ≤ 【0.001% – 0.01%】 (grade-dependent) |
| Water Insoluble Matter | ≤ 【0.02% – 0.1%】 |
| pH (1% solution) | 【3.0 – 4.0】 |
| Block Weight Range | 【50g —1500g】 |
The values above represent indicative product specifications across different grades. Actual results depend on the selected grade and production batch. For a detailed review, please consult the applicable Technical Data Sheet (TDS) and the Certificate of Analysis (COA) for the relevant batch. Buyers can request additional test information for heavy metals, chloride content, loss on drying and other relevant parameters, subject to the available test data.
We can provide batch-specific COA documentation and support third-party testing arrangements, subject to confirmation.
Block vs. Powder Potassium Alum: Which Form Do You Need?
Block and powder potassium alum share the same chemical composition, but their physical forms suit different handling and processing requirements.
Choose Block Potassium Alum When:
- You prefer solid crystals that are easy to handle, package and store.
- You manufacture crystal deodorant stones and require suitable transparent block material.
- Your process involves preparing an alum solution from solid blocks.
- You want to reduce powder-related dust and caking issues during handling and storage.
Choose Powder Potassium Alum When:
You need convenient weighing, faster dissolution under suitable conditions, or compatibility with powder-handling and dosing equipment.
However, dissolution speed depends on particle size, water temperature, agitation and solution concentration. Therefore, buyers should evaluate the appropriate form against their actual process requirements.
If you are unsure which form suits your operation, tell us your industry, intended application and processing method. We can help you evaluate the available options.
Core Advantages of KolinSC Block Potassium Alum
Genuine Potassium Alum, Consistent Purity
Real potassium alum with controlled Al2O3, low iron and low heavy metals. No ammonium alum substitution. Reliable batch-to-batch quality across all grades.
Physically Stable for Export & Storage
Block crystals resist caking and moisture absorption far better than powder. They pack and ship cleanly, with minimal handling risk during sea freight and long-term warehouse storage.
Multi-Industry Versatility
One product serves water treatment, leather tanning, textile dyeing, paper processing, fire-retardant and personal care manufacturing — ideal for distributors and traders serving multiple end markets.
High Crystal Clarity
Controlled crystallisation produces clear, glassy blocks suitable for both industrial use and cosmetic-grade deodorant stone raw material.
Customisable Block Sizes
From small consumer-sized crystals to large bulk blocks. We can match the size your process or product requires.
Consistent Batch Quality
Every lot tested for Al2O3, iron, insoluble matter, pH and heavy metals. COA ships with every container.
Main Application Fields
Water Treatment Coagulation
Potassium alum can serve as a coagulant in suitable water treatment processes. After dissolution, the resulting solution can help destabilize suspended particles and colloids, allowing flocs to form and facilitating solid-liquid separation. However, treatment performance depends on raw-water characteristics, dosage, pH, alkalinity and the applicable treatment requirements. For drinking-water applications, buyers must confirm that the selected grade meets the relevant local standards and approval requirements.
Leather Tanning and Retanning
Leather manufacturers may use potassium alum in selected tanning and retanning processes. Its suitability depends on the leather type, process formulation and required finished-leather properties.
Textile Dyeing and Mordanting
In suitable textile processes, potassium alum can function as a mordant to help improve the interaction between certain dyes and textile fibers. Results depend on the dye system, fiber type and processing conditions.
Paper Industry
Depending on the formulation and process, potassium alum may serve as an auxiliary chemical in selected papermaking applications. Buyers should confirm its suitability with their process requirements and other additives.
Fire-Retardant Formulations
Potassium alum may be used as a component in certain fire-retardant formulations for textiles and paper. However, the finished product’s fire performance depends on the complete formulation and relevant test results.
Natural Crystal Deodorant Stone Manufacturing
Suitable transparent block potassium alum can serve as a raw material for manufacturing crystal deodorant stones. Manufacturers should evaluate crystal appearance, chemical purity, block dimensions and applicable cosmetic regulations before production.
Cosmetics and Personal Care
Depending on the formulation and intended use, suitable potassium alum grades may serve as functional ingredients in selected personal care products, including certain astringent formulations. Manufacturers should assess product safety, ingredient specifications and applicable cosmetic requirements before use.
Packaging and Shipping
Packaging Options
- Bulk block packaging: 25 kg or 50 kg PE-lined woven bags, subject to the selected product grade and packaging availability.
- Jumbo bags: 1,000 kg packaging may be available for suitable bulk orders.
- Palletized shipments: Palletizing and stretch wrapping can be arranged according to shipping requirements.
Please confirm the packaging type, net weight, labeling requirements and destination-country regulations before placing an order.
Shipping and Handling
Block potassium alum is generally easier to handle than fine powder in applications where dust control matters. However, rough handling may chip or break the crystals during transportation. For orders that require transparent crystals, we recommend discussing protective inner packaging and cartons before shipment.
Storage
Store potassium alum in a cool, dry and well-ventilated warehouse. Keep the original packaging sealed and protect the product from excessive humidity and contamination.
Shelf Life
The stated shelf life is 36 months from the production date when the product remains in its original sealed packaging under the recommended storage conditions. Please confirm the shelf-life specification for the selected grade before ordering.
B2B Order and Trading Information for Global Buyers
- Minimum Order Quantity (MOQ): 1 metric ton (1,000 kg), subject to order confirmation.
- Sample Service: Samples of several pieces or approximately 500 g–1,000 g may be available. The customer covers express freight. We can discuss whether the sample fee can be credited against a confirmed bulk order.
- Monthly Production Capacity: Up to 2,000 metric tons per month, subject to actual production capacity and order scheduling.
- Lead Time: Estimated at 7–15 working days after deposit confirmation, subject to order quantity, production scheduling and packaging requirements.
- Payment Methods: T/T and XTransfer, subject to transaction terms and availability.
- Export Documents: COA, SDS, Certificate of Origin, Commercial Invoice and Packing List, as applicable to the order and destination.
- HS Code: 2833.30 may be relevant to aluminum sulfate and certain alum classifications. The final HS code must be confirmed with the customs broker or relevant customs authority based on the product composition and destination country.
- Markets Served: We welcome inquiries from buyers in Southeast Asia, the Middle East, Africa, Europe, North America and South America.
Please share your required grade, quantity, packaging preference and destination port so we can confirm product availability and provide a suitable quotation.
Why Choose KolinSC as Your Potassium Alum Supplier
We supply block and powder potassium alum, block and powder ammonium alum, plus PAC and PAM. One consolidated source for your water treatment and industrial chemical needs.
We supply real potassium alum — not an ammonium substitute. Your customers and end users get the product they expect.
Water treatment, industrial and cosmetic grades available in multiple block sizes. We accommodate both industrial bulk orders and personal care brand requirements.
Every shipment includes a batch-matched Certificate of Analysis. SGS, BV and other third-party inspections before loading are welcome.
Frequently Asked Questions (FAQ)
Block potassium alum is a double sulfate crystal used in several industrial applications. Common uses include suitable water treatment processes, textile dyeing and mordanting, selected leather-processing applications, and certain papermaking formulations. In addition, suitable transparent crystals can serve as raw materials for crystal deodorant stone manufacturing. The appropriate grade depends on the intended application and relevant regulatory requirements.
First, dissolve the blocks in clean water to prepare an alum solution. Then, evaluate the solution in the intended treatment process. The required dosage depends on raw-water quality, turbidity, pH, alkalinity and treatment objectives. Therefore, jar testing is recommended to determine a suitable dosage. For drinking-water applications, confirm the applicable grade and regulatory requirements before use.
Potassium alum has the chemical formula KAl(SO₄)₂·12H₂O, whereas ammonium alum has the formula NH₄Al(SO₄)₂·12H₂O. Both are double sulfate salts and may have similar crystalline appearances. However, they contain different cations and may have different properties, specifications and application requirements. Buyers should compare actual product specifications and prices rather than assume that one type is always more economical or suitable for a particular industry.
Block and powder potassium alum share the same chemical composition when they represent the same grade. However, their physical forms affect handling, storage, weighing and dissolution. Blocks may suit processes that prepare solutions from solid crystals, while powder may be more convenient for precise weighing and certain dosing systems. The best option depends on the equipment and operating conditions.
Ordering, Packaging and Product Use FAQs
Yes. Suitable transparent block potassium alum can serve as a raw material for crystal deodorant stones. Manufacturers should evaluate crystal appearance, purity, physical dimensions and applicable cosmetic requirements before production.
Yes. Although solid blocks are convenient to handle, rough handling and impact can chip or break crystals during transportation. For orders that require transparent, intact crystals, discuss protective inner packaging, cartons and suitable palletization before shipment.
The stated shelf life is 36 months from the production date when the product remains in its original sealed packaging under the recommended storage conditions. Please confirm the applicable shelf-life specification for your selected grade.
Yes. Samples of several pieces or approximately 500 g–1,000 g may be available, depending on the selected grade. The customer covers express freight. Please contact us to confirm sample availability, charges and whether the sample fee can be credited against a confirmed bulk order.
WE’RE HERE TO HELP
Looking for a reliable block potassium alum supplier for your water treatment plant, tannery, textile mill or personal care manufacturing operation?
Tell us your industry, intended application, required grade, block weight, order quantity and destination port. We will review your requirements and respond within 12 working hours, subject to our business hours and inquiry volume.
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