A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.
Request SDS →Polyaluminum chloride (PAC, PACl, CAS 1327-41-9) is a pre-hydrolyzed, high-efficiency aluminum coagulant for drinking-water and wastewater treatment. Because it is already partially neutralized (basic), it coagulates over a wider pH range than alum, works better in cold or low-alkalinity water, consumes less alkalinity, and produces less sludge.
Polyaluminum Chloride: Applications & Grades
PAC is dosed as a primary coagulant for turbidity, color, and organics removal and for phosphorus control. Its performance is set by two numbers: % Al2O3 (strength) and basicity (degree of pre-neutralization) — higher basicity means less pH depression and better cold-water flocculation. Drinking-water grades meet NSF/ANSI 60 and AWWA B408.
Grades Compared
Match the grade to your water temperature, alkalinity, and feed system:
Switching from alum or need a specific basicity? Send your water temperature, alkalinity, and dose on an RFQ for the right PAC.
Frequently Asked Questions
What is polyaluminum chloride (PAC) used for?
PAC is a pre-hydrolyzed aluminum coagulant for drinking-water and wastewater treatment — turbidity, color, organics, and phosphorus removal. It coagulates over a wider pH range than alum, performs better in cold water, uses less alkalinity, and makes less sludge. RawSource supplies NSF/ANSI 60 grades.
PAC vs alum — what’s the difference?
PAC is partially pre-neutralized (“basic”), so it depresses pH far less than alum, needs less or no supplemental alkalinity, flocculates better in cold/low-alkalinity water, and generates less sludge — usually at a lower dose. Alum is cheaper per pound. Many plants switch to PAC for performance and reduced chemical handling.
What do Al2O3 % and basicity mean for PAC?
Al2O3 % is the aluminum strength (dose basis); basicity is how pre-neutralized the product is (higher = less pH drop, better cold-water performance). A high-basicity PAC suits cold or low-alkalinity water; a standard PAC suits general use. Match both to your water on the RFQ.
How is PAC supplied in bulk?
RawSource supplies polyaluminum chloride as liquid (10–18% Al2O3) in bulk and totes, or spray-dried powder (28–30%) in supersacks, under CAS 1327-41-9. Grade, Al2O3/basicity, packaging, and MOQ confirmed at quotation against the CoA. Submit a bulk RFQ.