What Is Polyaluminium Chloride?

Polyaluminum chloride (PAC), also known as "polyaluminum chloride" or "coagulant," is a resin-like solid with a color of yellow or light yellow, dark brown, or dark gray. This product has strong bridging adsorption performance, and during the hydrolysis process, physical and chemical processes such as coagulation, adsorption, and precipitation occur.
Poly aluminum chloride is classified into two types: one for drinking water and one for industrial water, each conforming to different relevant standards. It appears yellow, pale yellow, dark brown, or dark gray in color and is available in both liquid and solid forms. This product possesses strong bridging and adsorption properties; during hydrolysis, it undergoes physicochemical processes such as flocculation, adsorption, and precipitation. The fundamental difference between polyaluminum chloride and traditional inorganic coagulants lies in their composition: traditional inorganic coagulants are low-molecular-weight crystalline salts, whereas polyaluminum chloride consists of polycarboxylate complexes with diverse structures. It features rapid flocculation and sedimentation, a wide applicable pH range, and is noncorrosive to piping and equipment. It delivers significant water purification results, effectively removing color, suspended solids (SS), chemical oxygen demand (COD), and biological oxygen demand (BOD), as well as heavy metal ions such as arsenic and mercury. This product is widely used in the fields of drinking water, industrial water, and wastewater treatment.

Polyaluminium Chloride Properties

Quality Indicator

Differences in PAC Color

Due to differences in production processes and raw materials, the color of the resulting PAC varies slightly. Generally, polyaluminum chloride comes in six colors: white, pale yellow, golden yellow, brown, dark brown, and coffee brown. 

White Polyaluminium Chloride

White polyaluminum chloride is a newly developed water purification material. It is specifically designed for use in a wide range of applications, including food processing, drinking water, municipal water supply, water purification for precision manufacturing, the paper industry, pharmaceuticals, sugar refining, cosmetic additives, and the general chemical industry. It boasts extremely high purity and commands the highest price.

Light Yellow Polyaluminium Chloride

Light yellow polyaluminum chloride is a mid-to-high-end product, second only to white polyaluminum chloride. It is primarily used in drinking water treatment, where restrictions on heavy metal content are particularly strict. This is especially true for our drinking water-grade polyaluminum chloride products, which produce clear water with no sediment after treatment. The Al₂O₃ content is approximately 30 (±0.5). It features a fine powder with uniform particles, excellent flocculation performance, highly efficient and stable purification, low dosage requirements, and low cost. It is the dedicated water treatment flocculant used by major water treatment plants with whom we have long-term partnerships.

Golden Yellow Polyaluminium Chloride

Golden-yellow polyaluminum chloride is currently the most widely used polyaluminum chloride on the market. As a highly effective flocculant for wastewater treatment, it delivers excellent flocculation results, making it the preferred choice for industrial water supply, industrial wastewater treatment, industrial water recycling, and municipal wastewater treatment.

Brown, Dark Brown, and Coffee-Colored Polyaluminium Chloride

Brown, tan, and coffee-colored polyaluminum chloride (PAC) are water treatment products manufactured to meet the specific requirements of certain customers. These products have a higher iron content than other PAC product lines, resulting in a color that is darker than the typical golden yellow. They are highly effective for treating wastewater characterized by low temperatures, low turbidity, and high algae levels and are primarily used in the purification of drinking water, municipal water supplies, and industrial water supplies.

Polyaluminium Chloride Applications

Polyaluminum chloride effectively eliminates bacteria, odors, fluoride, heavy metals, and other pollutants and is extensively applied to the purification of drinking water, domestic and various industrial wastewater, as well as multiple industrial fields, including papermaking, printing and dyeing, oil refining, and pharmaceutical production.

Why Choose Kerton Chemicals As Your Polyaluminium Chloride Supplier?

Partner with Kerton Chemicals for high-quality, compliant PAC that meets both drinking water (GB/T 15892-2020) and industrial (GB/T 22627-2022) standards. We offer customized grades (white, yellow, brown) in liquid or solid form, backed by strict quality control, competitive factory-direct pricing, and responsive technical support. 

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