For research scientists and product formulators in the chemical industry, a nuanced understanding of chemical grades is fundamental to innovation and application success. Polyaluminium Chloride (PAC), a versatile inorganic polymer flocculant, is no exception. While universally recognized for its efficacy in water treatment and other industrial uses, the variations in PAC grades can significantly impact performance in specific applications. As a leading manufacturer and supplier of PAC, we provide a scientist-focused overview of these critical distinctions.

The Core Specifications: Al2O3 Content and Basicity

Polyaluminium Chloride (CAS 1327-41-9) is characterized by its complex polymeric structure, with its efficacy determined by key parameters: Aluminum Oxide (Al2O3) content and basicity. Al2O3 content, often expressed as a percentage, indicates the concentration of active aluminum species in the product. Higher Al2O3 content generally correlates with greater coagulating power and efficiency, meaning less product is needed to achieve desired results. For applications requiring robust flocculation, grades with 29-31% Al2O3 are often preferred.

Basicity, typically ranging from 40% to 90%, is a measure of the degree of neutralization of aluminum chloride with aluminum hydroxide. It dictates the distribution of hydroxyl groups and the overall molecular structure of the polymer. A higher basicity (e.g., 70-90%) often leads to shorter, more positively charged polymer chains, which can be highly effective in destabilizing a wider range of colloidal particles and reducing residual aluminum in treated water. Conversely, lower basicity grades (e.g., 40-60%) might be suitable for specific pH ranges or applications where less aggressive charge neutralization is required. Understanding these parameters is crucial for formulation scientists aiming to optimize performance in their specific matrices.

Appearance and Physical Form: Beyond the Obvious

PAC is commonly available in several physical forms and appearances, each hinting at its manufacturing process and suitability for different handling and application methods:

* Powdered PAC: Available in colors from bright yellow to light yellow, golden yellow, and even white. Spray-dried powders are widely used due to their ease of handling, transportation, and dissolution. White powdered PAC is often preferred for drinking water applications due to its higher purity.

* Liquid PAC: Offered in various concentrations, liquid PAC is convenient for automated dosing systems and requires no dissolution step, reducing labor and potential for handling errors.

The choice between powder and liquid, and the specific color, often depends on the plant's infrastructure, operational protocols, and the sensitivity of the application to minor impurities. For R&D, testing different forms can reveal process advantages.

Sourcing High-Quality PAC for Research and Development

When procuring Polyaluminium Chloride for R&D or specialized formulations, it is vital to partner with a manufacturer that provides detailed product specifications and adheres to strict quality control. As a leading supplier from China, we offer various grades of PAC, supported by certificates of analysis (COA) that clearly state Al2O3 content, basicity, water insolubles, and heavy metal limits. This transparency is essential for scientists who rely on precise chemical properties for their experiments and product development. Engaging with a supplier that understands these scientific needs ensures you receive the most appropriate material for your projects.