Aluminum Chlorohydrate (ACH) CAS 12042-91-0

Product Overview

Aluminum Chlorohydrate (ACH) is supplied as a high-basicity inorganic coagulant for water clarification and particle removal systems. It is commonly applied in drinking water, process water, and municipal or industrial treatment operations where stable coagulation performance and efficient solids separation are required.

Commercial ACH is a hydrated, polymeric material supplied in different solid or solution forms rather than a single fixed-purity molecule.

Grade Selection and Test Methods

Compare ACH quotations on the same aluminium (Al) or equivalent alumina (Al₂O₃) basis and state whether results refer to the supplied liquid or dry material. Basicity describes the degree of hydroxylation of the aluminium salt; it is not the solution pH. For the general formula Alₙ(OH)ₘCl₍₃ₙ₋ₘ₎, basicity is m/(3n) × 100%. The idealized Al₂(OH)₅Cl ratio gives 83.3%; this calculation is not a guaranteed specification for every supplied grade.

For water-treatment grades, align aluminium content, chloride, basicity, insoluble matter and relevant impurity limits, with pH and density test conditions stated. For antiperspirant grades, size-exclusion chromatography (SEC/GPC-HPLC) can help characterize the distribution of aluminium species. We can provide applicable SEC chromatographic data with the method conditions for the selected antiperspirant grade; it is not a single-molecule purity percentage.

Product Information / Specifications

Physical & Chemical Properties

Applications

• Drinking-water coagulation only when the supplied grade and local treatment requirements are confirmed.
• Municipal water-treatment systems using ACH to form flocs and separate suspended solids.
• Industrial process water treatment where turbidity control and clarification performance are required.
• Raw-water and surface-water clarification programs using an approved aluminum coagulant grade.
• General water clarification programs where a high-basicity coagulant is selected for treatment optimization.

Compare ACH with polyaluminum chloride (PAC), aluminium sulfate and poly ferric sulfate (PFS) as coagulant options for the same water-treatment duty. ACH belongs to the polyaluminum chloride family, while the other products differ in metal content, composition or basicity. Use jar tests on the actual water to compare dose, treated-water quality and sludge formation; equal product weights do not establish equivalent performance.

Polyacrylamide (PAM) can serve as a flocculant aid in a treatment program using ACH. Select its ionic type and dose through testing for the intended clarification or sludge-separation step. It has a different role from an inorganic coagulant and should not be treated as a direct replacement.

Packaging

We specify ACH packaging in our quotation according to the selected solid or solution grade, quantity and destination.

Storage Conditions

Store in a cool, dry, and well-ventilated place in tightly closed containers. Avoid prolonged exposure to direct sunlight, excessive heat, and moisture.

Storage conditions and container selection should match the supplied form. For liquid products, corrosion-resistant storage tanks and transfer systems are generally used.

Safety Precautions

• Avoid contact with skin, eyes, and clothing during handling.
• Use suitable protective gloves, goggles, and work clothing.
• Provide appropriate ventilation and avoid unnecessary exposure to dust or mist.
• Use compatible corrosion-resistant equipment for storage and transfer where required.
• Handle and store Aluminum Chlorohydrate (ACH) according to the Safety Data Sheet (SDS) for the supplied form and the site safety procedures.