Polyaluminium Chloride — Aln(OH)mCl(3n-m)

Description

CAS Registry Number: 1327-41-9 · Formula Aln(OH)mCl(3n-m) · All grades on this page are supplied against this CAS number.

Polyaluminium Chloride (Aln(OH)mCl(3n-m)) is identified by CAS registry number 1327-41-9.

Synonyms in trade and literature: PAC; basic aluminium chloride; aluminium chlorohydroxide.

Polyaluminium chloride is a polymeric mixture rather than a discrete compound. It has no single molecular formula and no single molar mass, and PubChem returns no single CID for it. CAS 1327-41-9 covers basic aluminium chloride broadly, so two products sharing this number can differ substantially. The parameters that define the material are basicity and aluminium content expressed as Al2O3.

This page covers the substance itself. Commercial grades and physical forms — which differ in particle size, purity tier and production route — are described on the corresponding catalogue page.

Chemical and regulatory data below are generated from public reference sources by the site engine and are keyed to the CAS number.

Two grades on one ladder. Pack sizes from 100 g to 25 kg are supplied as laboratory grade (typically ≥99 % p.a. / ACS / Ph. Eur.), where the price is dominated by packaging, quality control and handling rather than by material. Tonnage quantities are supplied as technical grade and priced on a commodity basis. The price per kilogram therefore drops sharply between the 25 kg and 1 t steps — these are different products, not a pricing error.