Drinking water-grade polyaluminum chloride is also an inorganic polymer coagulant, commonly referred to as polyaluminum chloride or polyaluminum for short, with the English abbreviation PAC. Due to the bridging effect of hydroxide ions and the polymerization of polyvalent anions, this product has a relatively large molecular weight and is an inorganic polymer water treatment agent with high charge. In terms of form, it can be divided into solid and liquid. Solids are generally yellow or light yellow in color. Usage and Dosage of Drinking Water - Grade Polyaluminum Chloride First, dissolve the solid product in water at a ratio of 1:3 to form a liquid, then add 10 - 30 times of clear water to dilute it to the required concentration before use. The pH value for dosing is 3.5 - 5.0. Dosing after selecting the appropriate pH value can achieve the ideal coagulation effect. The dosage can be determined according to the different turbidity of the raw water. Generally, when the raw water turbidity is 100 - 500mg/L, the dosage per 1,000 tons is 10 - 20kg. When the raw water turbidity is high, the dosage should be appropriately increased; when the turbidity is low, the dosage can be appropriately reduced. The dosage of liquid products is 3 - 40 grams per ton, and the specific dosage is subject to flocculation tests and experiments. Packaging and Storage of Drinking Water - Grade Polyaluminum Chloride Products The product is packaged in a double - layer package consisting of a plastic moisture - proof film and a woven bag. The shelf life of drinking water - grade polyaluminum chloride products is one year. They should be stored in a ventilated and dry place, avoiding exposure to wind, sun and rain. Moisture has little impact on the use effect, and they must not be stored together with other chemical products.

Drinking water-grade PAC is first filtered to remove impurities and heavy metals through a plate and frame filter press, and then refined by drum or spray tower drying process. After hydrolysis, this product has no precipitates and boasts multiple advantages such as good stability, wide adaptability to water areas, strong adsorption capacity, formation of large alum flowers, dense and fast sedimentation, low effluent turbidity, and excellent dehydration performance. Under the same water quality conditions, the dosage of drinking water-grade polyaluminum chloride can be reduced by as much as half compared with other products, which not only reduces the labor intensity of workers but, more importantly, lowers the water production cost for users. In addition, drinking water-grade polyaluminum chloride products have high safety.

Drinking water-grade PAC can adapt to a pH range of 5.0-9.0, with the optimal pH being 6.5-7.6. It is suitable for the purification treatment of drinking water, river water, groundwater, and industrial circulating water. It can be applied in printing factories, dyeing factories, tanneries, breweries, meat processing plants, pharmaceutical factories, paper mills, coal washing, metallurgy, mining areas, as well as the treatment of wastewater containing fluorine, oil, and heavy metals. It is very safe and reliable for residents' drinking water, and its application effect in the field of industrial sewage treatment is also very ideal.

Drinking water grade polyaluminum chloride	Technical indicators
	Liquid	Solid
Aluminum oxide content (AL₂O₃)	10%	30%
Basicity	40-90%
PH (1% concentration aqueous solution)	3.5-5.0
Water insoluble matter	≤0.2	≤0.6
Arsenic (As)	≤0.0002%
Lead (Pb)	≤0.001%
Cadmium (Cd)	≤0.0002%
Mercury (Hg)	≤0.00001%
Hexavalent chromium (Cr⁶⁺)	≤0.0005%