Cosmetic ingredient dictionary
Magnesium Hydroxide in cosmetics: what it is and what it does
Magnesium Hydroxide is a cosmetic ingredient that absorbs water or oil. Open Beauty Facts finds it in 68 products, most often deodorants.
By Bravoora teamUpdated Sources checked 2 sourcesHow we check
What does Magnesium Hydroxide do in a product?
In a cosmetic product, Magnesium Hydroxide absorbs water or oil and keeps the product's acidity steady. The EU’s CosIng database lists these jobs for it: absorbent and buffering.
What other names and numbers does Magnesium Hydroxide have?
- CAS number
- 1309-42-8
- EC number
- 215-170-3
- CosIng reference
- 35096
Which products contain Magnesium Hydroxide?
Open Beauty Facts finds Magnesium Hydroxide in the ingredient lists of 68 of the 22,021 products it has a list for, most often deodorants and deodorant sticks.
Products with it, by country of sale: United States 23 · France 19 · Australia 9 · United Kingdom 5.
Counted on 13 October 2026 from Open Beauty Facts, which volunteers fill from real packs: it shows where Magnesium Hydroxide turns up, not how much of the market it is.
Bravoora reads this ingredient for everyone you shop for: an allergy or intolerance, a vegan or vegetarian diet, a calorie or protein goal, and the labels on supplements and skincare too. Build a profile · For dermatologists, dietitians and doctors
Sources
The job, the description and the EU annex entry are CosIng’s; the fragrance allergens are the EU Annex III names Bravoora’s label checker reads; the product counts are Open Beauty Facts’.
- European Commission: CosIng cosmetic ingredient database (functions, description, EU annex entry)
- Open Beauty Facts: product database, 77,506 products, read 13 October 2026, ODbL
Contains information from Open Beauty Facts, which is made available here under the Open Database License (ODbL). Read the licence · Download this dictionary’s data · How we check
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