Aluminium sulphate alum price

Buyers must prioritize the Al2O3 (Alumina) content, which typically ranges from 15.6% to 17% for high-quality grades. Additionally, distinguish between Iron-Free (Fe < 0.005%) and Non-Iron-Free types; iron-free alum is essential for high-end paper manufacturing and specific water treatment processes to avoid staining. The pH value (1% aqueous solution) should ideally be between 3.0 and 3.5 to ensure optimal coagulation performance.

For potable water treatment, ensure the product complies with ANSI/AWWA B403-16 or the European standard EN 878. If the product is intended for the food industry or sensitive applications, verify ISO 9001:2015 quality management certifications and ensure the supplier provides a comprehensive Material Safety Data Sheet (MSDS) and a Certificate of Analysis (COA) for every batch.

Aluminium Sulphate is available in powder, granular, and flake forms. Powdered alum offers the fastest dissolution rate but may require specialized dust-control handling. Granular and flake forms are easier to store and transport. Pricing is often influenced by the particle size uniformity and the dehydration level; fully hydrated forms are generally cheaper per ton but may incur higher shipping costs due to water weight.

The most common application is as a coagulant in water purification and sewage treatment plants. In the pulp and paper industry, it serves as a sizing agent to improve paper water-resistance. Other scenarios include its use as a mordant in dyeing textiles, a firming agent in food processing (food-grade only), and a soil pH adjuster in large-scale agriculture.

The primary risks include moisture absorption during sea transit, which can cause caking, and purity discrepancies between the sample and the bulk order. To mitigate this, insist on seaworthy, moisture-proof packaging (such as 25kg or 1000kg PP/PE bags with inner liners) and utilize third-party inspection services (like SGS or Intertek) to verify chemical composition before the balance payment is made.

Focus on volume-based pricing tiers; ordering in full container loads (FCL) significantly reduces the unit price compared to LCL. Discuss long-term supply contracts to hedge against fluctuations in the raw material costs of bauxite and sulphuric acid. Always ask for FOB (Free On Board) pricing to maintain control over your logistics costs and choose your own freight forwarder.

Ensure the supplier is a verified manufacturer on Made-in-China.com to avoid trading company markups. Use Secured Payment services to protect your funds until shipping documents are uploaded. Because Aluminium Sulphate is acidic, ensure the shipping container is inspected for corrosion resistance and that the cargo is not stowed near incompatible chemicals like alkalis.

Aluminium Sulphate is generally classified as non-hazardous for transport (unless specified otherwise by local regulations), which simplifies logistics. However, you must ensure the HS Code (typically 2833210000) is correctly declared to avoid customs delays. For inland transport, confirm the supplier's proximity to major ports like Qingdao or Tianjin to minimize domestic trucking fees.