Aluminum chlorohydrate
Aluminum chlorohydrate is a water-soluble basic aluminum chloride, a polymer of aluminum, hydroxide and chloride with roughly a 2:1 aluminum-to-chloride ratio. It is made by reacting aluminum metal or aluminum hydroxide with hydrochloric acid or aluminum chloride, then concentrating or spray-drying. Brands buy it as a 50% solution or as powders of different particle size for roll-ons, sprays and sticks.
Suppliers sell different products under the same name. Specify the one you need.
Aqueous solution, the usual form for roll-ons and water-based products.
Spray-dried powder in several particle sizes, used in sticks, soft solids and aerosols.
ACH with a modified polymer size distribution for higher activity, sold as powder or solution.
Aluminum chlorohydrex PG or PEG, ACH complexed with a glycol for clear or anhydrous formulas, listed under their own names.
Compare each result with your own specification when the lot arrives.
Keep solutions and powders in closed plastic or lined containers; the material is corrosive to many metals. Powders are hygroscopic and must be kept sealed and dry. Shelf life is set by the supplier, and activated grades can revert over time, so follow their stated use-by period.
Record the Al:Cl ratio, anhydrous active and particle size for each lot, since label percentage is calculated on the anhydrous basis. For activated grades, note the manufacture date and use within the supplier's window.
Facts from regulators and standards bodies, each linked to its source.
21 CFR 350.10 (2024 edition on govinfo.gov) lists aluminum chlorohydrate up to 25 percent as an OTC antiperspirant active ingredient.
Source: govinfo.gov (opens in a new tab)Health Canada's Cosmetic Ingredient Hotlist restricts aluminum chlorohydrate and its associated complexes to 25% (calculated as the anhydrous form) in deodorants and antiperspirants, and does not permit combining them with aluminum chloride, other aluminum chlorohydrate complexes or aluminum zirconium complexes.
Source: canada.ca (opens in a new tab)This is general information, not regulatory advice. Status differs by country and by how the ingredient is used, so check the rules for your product and market.
Manufacturers and distributors whose own websites say they sell it.
Manufacturer · London, United Kingdom
UK specialty chemicals group known for rheology modifiers and antiperspirant actives; its personal care range also lists meadowfoam seed oil and shea butter.
Suppliers are in alphabetical order and none pays to appear. Each claim is checked against the supplier’s own website on the date shown. Ask for the specification sheet and a recent COA before you order, and confirm details with the supplier.
Common forms include 50% solution, powder, activated grades and propylene glycol and PEG complexes. Ask each supplier for the specification sheet of the exact grade they quote.
Expect aluminum and chloride, anhydrous active content, pH, iron and heavy metals and particle size, each with its method, specification and result for that lot.
Keep solutions and powders in closed plastic or lined containers; the material is corrosive to many metals. Powders are hygroscopic and must be kept sealed and dry. Shelf life is set by the supplier, and activated grades can revert over time, so follow their stated use-by period.
21 CFR 350.10 (2024 edition on govinfo.gov) lists aluminum chlorohydrate up to 25 percent as an OTC antiperspirant active ingredient. Health Canada's Cosmetic Ingredient Hotlist restricts aluminum chlorohydrate and its associated complexes to 25% (calculated as the anhydrous form) in deodorants and antiperspirants, and does not permit combining them with aluminum chloride, other aluminum chlorohydrate complexes or aluminum zirconium complexes.
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