We are a reliable Block Ammonium Alum Supplier. Our high-purity ammonium alum crystal, also named ammonium aluminum sulfate, works well for natural deodorant stones and water treatment coagulation. Furthermore, we supply both block crystal and powder grades to global B2B buyers.
Product Overview
Ammonium Alum (Ammonium Aluminum Sulfate, chemical formula NH4Al(SO4)2·12H2O) is a colourless, odourless double sulfate crystal made from aluminum sulfate and ammonium sulfate. In addition, we use controlled crystallisation to produce transparent, glassy block crystals with stable chemical properties and consistent purity.
Block ammonium alum serves two major B2B markets: (1) the natural personal care industry, where buyers use the block form directly as crystal deodorant stones and after-shave astringent; and (2) the water treatment and industrial sector, where it acts as a traditional coagulant for removing suspended solids and turbidity. Therefore, thanks to its well-known astringent properties, stable crystal form and natural origin, ammonium alum is a trusted ingredient in both consumer-oriented and industrial supply chains worldwide.
Ammonium Alum Crystal Blocks
A selection of ammonium alum crystal blocks showing variations in size, shape and surface texture.
Ammonium Alum Crystal – Hand-Held Sample
Hand-held ammonium alum crystal showing its translucent appearance and irregular shape.
Key Specifications Summary
Core Technical Parameters for Quick Screening
| Item | Specification |
| Appearance | Colourless / transparent glassy block crystal |
| Al2O3 Content | 【10.0% – 11.0%】 |
| Fe Content | ≤ 【0.001% – 0.01%】 (grade-dependent) |
| Water Insoluble Matter | ≤ 【0.02% – 0.1%】 |
| pH (1% solution) | 【3.0 – 4.0】 |
| Available Forms | Block crystal / crystalline powder |
| Available Grades | Deodorant / Cosmetic Grade, Water Treatment Grade, Industrial Grade |
Full test data — including heavy metal indices (Pb, As, Cd, Hg), loss on drying, chloride content and batch-wise impurity limits — sits inside our official TDS for quality review, cosmetic regulatory compliance and customs clearance. Besides.
All on-page figures represent our standard production range. We list batch-wise actual values on the COA that we provide with every shipment. Moreover, we support third-party testing.
Product Forms & Grades — Quick Selection Guide
Block Crystal Form
Solid, glassy, transparent blocks. Ideal for natural crystal deodorant stones, retail personal care products, and applications requiring a stable physical crystal form. Blocks are resistant to moisture loss during transport and easy to handle.
Crystalline Powder Form
Fine, free-flowing crystals. Dissolves faster than blocks and is preferred for water treatment dosing, industrial processes, and cosmetic formulation where precise weighing is required.
Deodorant / Cosmetic Grade
Ultra-low heavy metals and high transparency. Meets requirements for natural crystal deodorant stones, after-shave products, and cosmetic ingredient use. Suitable for export to personal care brands.
Water Treatment Grade
Standard purity for drinking water and wastewater coagulation, turbidity removal and flocculation. Meets relevant water treatment chemical standards.
Industrial Grade
For general industrial applications where high cosmetic-grade purity is not required. Economical bulk option.
Not sure which form or grade fits your market? For example, if you produce natural deodorant stones or run a water treatment plant, tell us your application (deodorant stone manufacturing, water treatment plant, cosmetic formulation, etc.) and we will recommend the right product with a sample.
Core Advantages of KolinSC Ammonium Alum
High-Purity Transparent Crystal
First of all, our controlled crystallisation process produces clear, glassy blocks with consistent colour and low impurity levels — critical for deodorant stone retail and cosmetic ingredient use.
Ultra-Low Iron & Heavy Metals
We control iron content to very low levels, ensuring the crystal remains transparent and does not introduce unwanted colour into water treatment or personal care formulations.
Dual-Market Versatility
One product family serves both the natural personal care market (deodorant stones) and the water treatment industrial market — allowing you to consolidate supplier relationships.
Stable Physical Form for Export
Block crystals are less prone to caking and moisture absorption than powder, making them well-suited for sea freight and long-distance shipping.
Full-Grade Supply
We supply block and powder forms across deodorant, water treatment and industrial grades, with custom sizes and packaging available.
Consistent Batch Quality
Every batch is tested for Al2O3, iron, insoluble matter and heavy metals. COA ships with every container.
Main Application Fields
Natural Crystal Deodorant Stones
Buyers widely use the block form as a natural, fragrance-free crystal deodorant stone. Specifically, you apply it after showering with a little water, and it leaves a protective mineral layer that inhibits bacterial growth without staining clothing.
After-Shave & Personal Care
Astringent properties make ammonium alum a traditional ingredient in after-shave lotions, skin toners and men’s grooming products.
Water Treatment & Coagulation
Used as a traditional coagulant in drinking water and wastewater treatment to remove suspended solids, turbidity and colloidal impurities.
Cosmetic & Toiletry Formulation
Functional ingredient in skin-care, oral-care and toiletry products requiring astringent or antiseptic mineral properties.
Leather Tanning
Used in leather processing as a tanning and retanning auxiliary.
Dyeing & Textile
Mordant and fixing agent in textile dyeing processes.
Paper & Fire-Retardant Industries
Used as a precipitating agent, sizing auxiliary and fire-retardant additive in paper and textile manufacturing.
Packaging & Storage
Packaging Options
- 25 kg——50kg PP woven bag with inner PE moisture-proof liner
- 1000 kg jumbo / IBC bag for bulk industrial orders
- Custom retail packaging (small blocks, blister packs, etc.) can be discussed for personal care brand customers
Storage Requirements
Store in a cool, dry, ventilated warehouse. Keep packaging sealed. Although more stable than powder, ammonium alum blocks can develop surface efflorescence under very humid conditions — protect from moisture and direct sunlight.
Shelf life: 36 months in original sealed packaging.
B2B Order & Trading Information
- MOQ: 【1 Metric Ton (1,000 kg)】
- Sample Service: 200 g – 1 kg sample available; customer covers express freight; The sample fee can be refunded against a confirmed bulk order.
- Monthly Production Capacity: 【2000 MT / month】
- Lead Time: 7 – 15 working days after deposit confirmation
- Payment Terms: T/T,XTransfer
- Export Documents Available: COA, MSDS/SDS, Certificate of Origin, Commercial Invoice, Packing List
- HS Code: 【28332900】 (subject to destination-country customs classification)
- Main Markets: Southeast Asia, Middle East, Africa, Europe, South America
Why Choose KolinSC as Your Alum Supplier
We supply both Ammonium Alum and Potassium Alum, plus PAC (white and yellow) and PAM — one consolidated source for your water treatment and personal care chemical needs.
We understand the quality expectations of natural deodorant stone brands: crystal transparency, low heavy metals, block size consistency and retail-ready packaging.
Whether you are a water treatment plant, a cosmetic brand or an industrial trader, our engineers help you select the right grade and form.
Every shipment includes a batch-matched Certificate of Analysis. SGS, BV and other third-party inspections before loading are welcome.
FAQ
Both are alum double sulfate crystals. Ammonium Alum (NH4Al(SO4)2·12H2O) contains ammonium ions; Potassium Alum (KAl(SO4)2·12H2O) contains potassium ions. They share similar appearance and many applications. Potassium alum is often preferred for cosmetic and deodorant use in some markets; ammonium alum is typically more economical. Please tell us your market and application, and we will advise which is more suitable.
Yes. The transparent block form is the classic natural crystal deodorant stone. It is odourless and works by creating an inhospitable surface for odour-causing bacteria. It does not block perspiration. Our deodorant-grade blocks are produced to the purity standards expected by personal care brands.
The chemical composition is the same. Block form is used directly as deodorant stones and where a stable crystal shape is needed. Powder form dissolves faster and is preferred for water treatment dosing, cosmetic formulation and industrial processes.
Dissolve in clean water with stirring. Blocks dissolve more slowly than powder — crush or grind them first for faster preparation. Typical dosing varies by water quality; a jar test is recommended to determine the correct dosage.
Deodorant/cosmetic-grade ammonium alum is widely used in crystal deodorant stones and after-shave products. It meets relevant heavy metal limits for skin-contact products. Please specify your regulatory market (e.g., EU, US, ASEAN) when enquiring so we provide the appropriate grade and documentation.
Block crystals are physically stable, but rough handling can produce surface dust or minor chipping. We pack blocks in moisture-proof inner bags and cartons. For deodorant-grade blocks where appearance matters, we can use protective inner packaging. Tell us your requirement and we will adjust packing.
36 months from production date when stored sealed in a cool, dry warehouse.
Yes. Samples of block and powder forms are available (customer pays freight). Every bulk shipment includes a batch-wise COA. SDS and Certificate of Origin are provided for customs.
WE’RE HERE TO HELP
Looking for a reliable ammonium alum supplier for your deodorant stone brand, water treatment plant or industrial process?
Tell us your application, required grade (deodorant / water treatment / industrial), block or powder form, target quantity and destination port — we will reply within 12 working hours with a free sample plan and competitive factory pricing.
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