Aluminum sesquichlorohydrate

Aluminum sesquichlorohydrate (CAS 11097-68-0), also known commercially as Aloxicoll and Astringen, is an inorganic aluminum salt used primarily as an antiperspirant active and as a coagulant in water treatment processes.

It occupies a mid-range position in the aluminum chlorohydrate family, offering a balance between astringency and skin compatibility that makes it a preferred active in personal care formulations.

In antiperspirant and deodorant products, it functions as the active ingredient by temporarily blocking eccrine sweat gland ducts, reducing perspiration output. Formulators incorporate it into roll-ons and sticks.

It is also used in aerosol formats where a moderately high aluminum content is required without the harshness associated with stronger aluminum salts. This makes it ideal for sensitive skin applications.

In municipal and industrial water treatment, it acts as a coagulant to destabilize suspended particles and colloidal matter, supporting clarification and sedimentation stages during the purification process.

It also finds use in pH buffering applications within treatment systems where controlled aluminum ion release is operationally advantageous. This ensures stability across various industrial water cycles.

Aluminum sesquichlorohydrate is supplied as an aqueous solution or as a dry powder, depending on the application and logistics requirements. Solution concentrations and powder grades are available to meet specifications.

Buyers should confirm grade suitability as cosmetic-grade material is held to tighter purity standards than technical-grade product intended for water treatment. Proper selection ensures optimal performance.