Potassium Alum

INCI: POTASSIUM ALUM

CAS Number
10043-67-1 (anhydrous) / 7784-24-9 (dodecahydrate)
Function
Astringent, deodorant active
Safety Rating
MODERATE

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status permitted
๐Ÿ‡บ๐Ÿ‡ธ US Status permitted
US Notes OTC active ingredient (astringent, listed as Alum, Potassium); CIR deferred to FDA review

For full compliance data across 55 jurisdictions, use the Substance Compliance tool.

Safety Data

Margin of Safety (MoS)
adequate
Dermal Absorption
low
Sensitization
low

Calculate MoS for your specific formulation with the MoS Calculator.

Expert Verdict

Aluminum systemic toxicity concern: neurotoxic at high doses; cumulative exposure from diet and cosmetics under scrutiny; SCCS opinions ongoing with particular concern in antiperspirants, deodorants, and lip products.

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Concern Level: Moderate

Frequently Asked Questions

Is Potassium Alum safe in cosmetics?

Aluminum systemic toxicity concern: neurotoxic at high doses; cumulative exposure from diet and cosmetics under scrutiny; SCCS opinions ongoing with particular concern in antiperspirants, deodorants, and lip products. The EU classifies Potassium Alum as "permitted". Safety rating: MODERATE.

Is Potassium Alum allowed in the EU?

Potassium Alum EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.

What does Potassium Alum do in cosmetics?

Potassium Alum functions as: Astringent, deodorant active. It is classified as a cosmetic ingredient in our database. CAS number: 10043-67-1 (anhydrous) / 7784-24-9 (dodecahydrate).

What is the Margin of Safety for Potassium Alum?

adequate The Margin of Safety (MoS) is calculated using SCCS methodology. A MoS above 100 is generally considered safe. Use the MoS Calculator tool to calculate MoS for your specific formulation and product category.

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