Aluminum Potassium Sulfate SDS: Understanding Safety Data and Its Distinction from Potassium Sulfate in Industrial Applications
When sourcing industrial chemicals for aluminum recycling, glass manufacturing, or agricultural applications, procurement professionals often encounter safety data sheets (SDS) for compounds that appear similar but have distinct properties. One such compound is aluminum potassium sulfate (potassium alum), whose aluminum potassium sulfate SDS you may need to review for occupational safety. However, what you actually require for your operations might be potassium sulfate (K2SO4)—a versatile, chlorine-free potassium salt used widely as a specialty fertilizer, in high-end glass production, and as a flux in aluminum recycling. This article demystifies the aluminum potassium sulfate SDS, highlights the crucial differences from potassium sulfate, and explores the many benefits of buying high-purity potassium sulfate from a trusted supplier like Weifang Hailei Fine Chemical Co., Ltd.
What is Aluminum Potassium Sulfate and Why Is Its SDS Important?
Aluminum potassium sulfate, often called potassium alum, has the chemical formula KAl(SO4)2·12H2O. It is a double sulfate salt that crystallizes as white, odorless octahedra. Historically used in water purification, textile mordanting, baking powders, and even aftershave formulations, this compound is not interchangeable with the potassium sulfate (K2SO4) that fuels modern industries. For any chemical handler, the aluminum potassium sulfate SDS (Safety Data Sheet) is the primary document for hazard communication, outlining physical, health, and environmental risks along with safe handling practices. Industrial buyers who mistakenly search for an aluminum potassium sulfate SDS when they intend to purchase potassium sulfate for aluminum recycling or glass making can avoid costly errors by understanding these two chemicals’ profiles.
An SDS for aluminum potassium sulfate typically classifies the substance as a mild irritant to skin and eyes, with no significant acute toxicity. It is not classified as carcinogenic, mutagenic, or reprotoxic. However, fine dust may cause respiratory irritation. The sheet will detail appropriate personal protective equipment (PPE), including safety glasses and dust masks, and first-aid measures. Because potassium alum is water-soluble, the SDS also addresses spill containment and ecological notes, warning against release into waterways due to its alum content, which can acidify soil.
Key Sections of an Aluminum Potassium Sulfate SDS
For procurement teams, understanding the structure of an aluminum potassium sulfate SDS ensures regulatory compliance and workplace safety. While specific details vary by manufacturer, a standard 16-section SDS follows the Globally Harmonized System (GHS). Here are the crucial sections every buyer should review:
- Section 1 – Identification: Product name, recommended use (e.g., laboratory reagent, water treatment), and supplier contact details.
- Section 2 – Hazard Identification: GHS classification, hazard pictograms (often none or an exclamation mark), signal word (“Warning”), precautionary statements.
- Section 3 – Composition/Information on Ingredients: Chemical identity, CAS number (7784-24-9 for aluminum potassium sulfate dodecahydrate), concentration range.
- Section 4 – First-Aid Measures: Instructions for eye contact (flush with water for 15 minutes), skin contact, inhalation (move to fresh air), ingestion (rinse mouth, do not induce vomiting).
- Section 5 – Fire-Fighting Measures: Extinguishing media (water spray, dry powder), special hazards (releases sulfur oxides under decomposition).
- Section 6 – Accidental Release Measures: Sweep up dry material, avoid dust generation, dispose of according to local regulations.
- Section 7 – Handling and Storage: Use with local exhaust ventilation; store in a cool, dry place away from incompatible materials (strong alkalis). Ensure containers are tightly closed.
- Section 8 – Exposure Controls/Personal Protection: Occupational exposure limits (not always established for alum), recommended dust masks, safety goggles, and protective gloves.
- Section 9 – Physical and Chemical Properties: White crystalline solid, melting point ~92.5°C (loses water), density 1.725 g/cm³, pH of 10% solution ~3.0–4.0.
- Section 10 – Stability and Reactivity: Stable under normal conditions; avoid contact with strong bases and oxidizing agents; decomposes when heated to release SOx.
- Section 11 – Toxicological Information: Acute oral toxicity (LD50) > 2,000 mg/kg (rat), low hazard; skin corrosion/irritation: slight irritation possible; eye damage: may cause redness and pain.
- Section 12 – Ecological Information: Not readily biodegradable; ecotoxicity to aquatic organisms may be moderate due to aluminum ion; avoid discharging into drains.
- Sections 13–16: Disposal considerations, transport information, regulatory information (TSCA, EINECS), and other data.
Procurement professionals handling potassium alum must have this SDS on file. But if your operation actually focuses on aluminum recycling or high-end glass making, the chemical you need is not alum but potassium sulfate. Let’s clarify the differences.
Potassium Sulfate vs. Aluminum Potassium Sulfate: Formula, Properties, and Industrial Applications
One of the most common mix-ups in bulk chemical procurement occurs between potassium sulfate and aluminum potassium sulfate. The potassium sulfate formula is K2SO4, a neutral inorganic salt containing only potassium and sulfate ions. In contrast, the aluminum potassium sulfate formula is KAl(SO4)2, often hydrated with 12 water molecules, making it an acidic double sulfate. Table 1 summarizes the critical differences.
| Property | Potassium Sulfate (K2SO4) | Aluminum Potassium Sulfate (KAl(SO4)2·12H2O) |
|---|---|---|
| Common Name | Sulfate of potash (SOP) | Potassium alum, alum |
| CAS Number | 7778-80-5 | 7784-24-9 |
| Molecular Weight | 174.26 g/mol | 474.39 g/mol |
| pH (aqueous solution) | ~7 (neutral) | ~3–4 (acidic) |
| Chloride Content | Typically < 0.5% | Not applicable |
| Main Industrial Role | Chlorine-free potassium source for fertilizer, glass flux, aluminum recycling salt, pharmaceutical excipient | Water purification, dye mordant, baking powder, astringent |
| SDS Hazard Statements | Generally not hazardous; may cause slight respiratory irritation as dust | Irritant; acidic nature requires cautious handling |
This fundamental divergence in chemistry means that potassium sulfate is valued for its potassium nutrient content (minimum 50% K2O) and chlorine-free character, while aluminum potassium sulfate is chosen for its coagulating and acidic properties. The aluminum potassium sulfate SDS highlights its mild irritant potential, whereas the SDS for potassium sulfate typically emphasizes low hazard and safe use in food-grade and fertilizer applications.
Industrial Uses of Potassium Sulfate
Potassium sulfate, or SOP, commands a premium in global markets due to its purity and versatility. Below are the primary uses of potassium sulfate across key industries, demonstrating why it is the material of choice over misidentified alternatives like alum.
What is Potassium Sulfate Fertilizer?
A common query from agricultural buyers is: what is potassium sulfate fertilizer? SOP is a high-potassium, low-chloride fertilizer providing essential potassium (K) and sulfur (S) to crops without the harmful chloride found in muriate of potash (KCl). With a guaranteed minimum 50% K2O and typically 18% sulfur, it is indispensable for chloride-sensitive crops including tobacco, potatoes, fruits, vegetables, and nuts. Potassium regulates osmosis, enzyme activation, and photosynthesis, while sulfur aids amino acid and protein formation. Because SOP does not increase soil salinity, it is ideal for arid regions and high-value protected cultivation like greenhouse tomatoes and melons.
Leading specialty fertilizer importers prefer granular potassium sulfate for direct application and water-soluble powder for fertigation and foliar sprays. The product’s uniformity and low insoluble content ensure compatibility with modern agricultural machinery.
Potassium Sulfate in Glass Manufacturing
High-quality glass—from television screens to optical lenses and crystal tableware—relies on potassium sulfate as a refining agent. Added in small percentages to the glass batch, it lowers the melting temperature and helps remove fine bubbles (glass fining). The potassium ion enhances glass brilliance and durability. Crucially, the absence of chloride in K2SO4 prevents the green tint and corrosion problems associated with sodium or potassium chloride-based fluxes. Glass manufacturers demanding superior clarity and chemical resistance routinely specify 99% minimum purity potassium sulfate, making Hailei Chemical a preferred partner with our consistent quality and comprehensive documentation.
The Role of Potassium Sulfate in Aluminum Recycling
The uses of potassium sulfate in aluminum recycling are often overlooked but are of growing importance. In secondary aluminum smelting, salt fluxes protect the molten metal from oxidation and absorb non-metallic impurities. While sodium chloride–potassium chloride mixtures are traditional, potassium sulfate is increasingly used as a component of salt flux to refine aluminum alloys—especially those destined for automotive and aerospace applications where chloride-induced corrosion is a risk. Potassium sulfate’s high melting point and fluxing action effectively cleanse the melt, improving metal recovery rates. This is where confusion with aluminum potassium sulfate arises: buyers seeking a flux for aluminum might search for “aluminum potassium sulfate” when they really need high-grade potassium sulfate. Obtaining the correct aluminum potassium sulfate SDS is important if you handle that compound, but for aluminum recycling flux, Hailei’s K2SO4 is the targeted solution.
Pharmaceutical and Other Niche Applications
Potassium sulfate serves as an excipient in pharmaceutical formulations, functioning as a source of potassium or as an inert filler. Its high purity (meeting USP/BP standards) makes it suitable for effervescent tablets and nutritional supplements. In gypsum board production, K2SO4 accelerates the setting of plaster of Paris, improving manufacturing efficiency. Additionally, potassium sulfate is the starting material for synthesizing various potassium chemicals, including potassium carbonate and potassium permanganate.
A Note on Glucosamine Sulfate Potassium Chloride
Some buyers also inquire about the uses of glucosamine sulfate potassium chloride. This compound is a dietary supplement ingredient used to support joint health. It consists of glucosamine sulfate stabilized with potassium chloride (or sometimes sodium chloride). While it contains potassium, it is chemically distinct from potassium sulfate and is not an industrial chemical. Pharmaceutical manufacturers producing glucosamine supplements may source raw potassium chloride separately, but they also occasionally need high-purity potassium sulfate for other preparations. So while the SDS for aluminum potassium sulfate and the specification for glucosamine sulfate potassium chloride address different supply chains, they all underscore the importance of precision in chemical procurement.
Sourcing High-Quality Potassium Sulfate: Specifications and Supplier Evaluation
When procuring potassium sulfate for any of the above applications, the following quality parameters are non-negotiable. At Hailei Chemical’s potassium sulfate product page, you will find detailed specifications that meet or exceed international standards:
- K2O content: ≥ 50% (some grades 52%)
- Chloride (Cl): ≤ 0.5% (premium grades ≤ 0.2%)
- Moisture: ≤ 0.5%
- Water insoluble matter: ≤ 0.05%
- pH (5% solution): 6.0–8.0
- Appearance: White powder or granular (0.2–2.0 mm)
- Heavy metals (as Pb): ≤ 10 ppm
Beyond the certificate of analysis, evaluate your supplier on production capacity, logistics reliability, and regulatory compliance. Hailei Fine Chemical operates a modern production facility with strict ISO 9001 quality management, offers flexible packaging (25 kg bags, 1,000 kg supersacks, or customer-specified), and has deep experience shipping globally with all necessary documentation—including the correct SDS for the product shipped. For industrial buyers, having a supplier that understands the subtle but critical distinction between potassium sulfate and compounds such as aluminum potassium sulfate can save time, ensure the right chemical arrives, and maintain compliance at every port.
Frequently Asked Questions About Aluminum Potassium Sulfate and Potassium Sulfate
Q: Can I use aluminum potassium sulfate instead of potassium sulfate as a fertilizer?
No. Aluminum potassium sulfate is acidic and contains aluminum, which is toxic to most plants in soluble form. Only potassium sulfate (K2SO4) provides plant-available potassium safely.
Q: Where can I download an aluminum potassium sulfate SDS?
If you handle potassium alum for water treatment or other uses, your supplier must provide its SDS. Hailei Chemical’s core product is potassium sulfate; we supply the appropriate SDS for that material. Always ensure you are viewing the SDS for the exact CAS number you are handling.
Q: Is potassium sulfate hazardous?
Under typical handling conditions, potassium sulfate is classified as non-hazardous. Its SDS usually lists no signal word. However, fine dust may cause mechanical irritation, so standard dust masks and goggles are recommended.
Q: What is the price difference between potassium sulfate and muriate of potash (MOP)?
SOP commonly commands a 30–50% premium over MOP due to its manufacturing complexity and chlorine-free value. For chloride-sensitive crops and specialized industrial uses, the ROI justifies the cost.
Ensure Your Next Shipment Meets the Mark
Whether you need a reliable source of potassium sulfate for chlorine-free fertilization, high-transparency glass, or advanced aluminum recycling flux, Hailei Chemical delivers consistent quality with full documentation, including the correct SDS. Don’t let confusion between aluminum potassium sulfate and potassium sulfate disrupt your supply chain. Visit our dedicated potassium sulfate page to review full specifications, or request a competitive quote today. Our team is ready to answer your technical questions and provide samples to ensure the product meets your exact needs.