For procurement professionals in the chemical industry, understanding the precise specifications of products like Polyaluminum Chloride (PAC) is essential for making informed purchasing decisions. PAC, a vital coagulant in water treatment, comes with a set of key parameters that directly influence its performance and suitability for various applications. As a leading manufacturer and supplier of PAC from China, we aim to clarify these specifications to help you secure the best product for your needs.

What is Polyaluminum Chloride (PAC)?

Polyaluminum Chloride (PAC) is an inorganic polymer that acts as a highly effective coagulant. It is widely used in water purification processes, from drinking water treatment to industrial wastewater management. Its primary function is to destabilize suspended and colloidal particles in water, leading to flocculation and subsequent removal through sedimentation or filtration.

Key Specifications to Consider When Buying PAC:

When you decide to buy Polyaluminum Chloride, pay close attention to the following critical specifications. These parameters are indicative of the product's quality and performance:

  1. Al2O3 Content: This is a primary indicator of the active aluminum content in PAC. It is typically expressed as a percentage of aluminum oxide (Al2O3). For industrial-grade PAC, the Al2O3 content usually ranges from 29% to 31%. A higher Al2O3 content generally suggests a more concentrated and potent product, potentially requiring lower dosages for effective treatment.
  2. Basicity (%): Basicity, often referred to as the degree of polymerization or hydrolysis, is a crucial parameter that reflects the stability and efficiency of the PAC molecule. It's defined as the molar ratio of hydroxyl groups to aluminum atoms. Typical basicity values for industrial PAC range from 40% to 90%. A higher basicity often indicates a more polymerized structure, leading to better flocculation performance, faster settling times, and reduced residual aluminum in treated water.
  3. Water-Insoluble Matter (%): This specification measures the amount of PAC that does not dissolve in water. For optimal performance, especially in automated dosing systems, it is essential to have a low percentage of water-insoluble matter, typically less than 0.6% for high-quality industrial PAC. High insoluble content can lead to clogging, inefficient usage, and reduced treatment effectiveness.
  4. pH (1% water solution): The pH of a 1% aqueous solution indicates the acidity of the PAC product. For most industrial applications, a pH range of 3.0 to 5.0 is common. This slight acidity is inherent to the product and is managed during the water treatment process.
  5. Appearance: Industrial-grade PAC is most commonly found as a yellow or light yellow powder. The color is generally due to the presence of iron impurities. White PAC, which has undergone further purification to remove iron, is also available for more sensitive applications like food processing or high-purity drinking water, though it is typically more expensive.

Ensuring Quality: The Role of Manufacturer and Supplier

As a leading PAC supplier in China, we emphasize the importance of these specifications. We work diligently to ensure our products consistently meet or exceed industry standards. When you purchase PAC from us, you can expect:

  • Certified Quality: Our products are manufactured under strict quality control systems (e.g., ISO9001) and comply with relevant national standards (e.g., GB15892-2009).
  • Traceability: Full Certificates of Analysis (COA) are provided for each batch, detailing all key specifications.
  • Technical Support: Our experts are available to help you select the most appropriate PAC grade based on your specific water treatment requirements and to advise on optimal dosages.

By understanding and prioritizing these specifications, procurement professionals can confidently source high-quality Polyaluminum Chloride that delivers optimal performance and value. Contact us to discuss your requirements and explore our range of PAC products.