Good Cosmetic Ingredient GHS Classified

Kaolin Aluminum Hydroxide

INCI: ALUMINUM HYDROXIDE

CAS Number
21645-51-2
Function
Opacifying, Emollient, Buffering
Safety Rating
GOOD

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status permitted
๐Ÿ‡บ๐Ÿ‡ธ US Status permitted
US Notes CIR reviewed; considered safe as used in cosmetics; chemically inert in topical application

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

Safety Data

Margin of Safety (MoS)
adequate
Dermal Absorption
negligible
Sensitization
none

Calculate MoS for your specific formulation with the MoS Calculator.

GHS Hazard Classification

Globally Harmonized System classification per ECHA C&L inventory and ILO/WHO International Chemical Safety Cards.

Routes of Exposure
The substance can be absorbed into the body by inhalation.

Expert Verdict

Chemically inert aluminum hydroxide used as opacifier and buffering agent; unlike soluble aluminum salts does not penetrate meaningfully; safe at typical cosmetic concentrations

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Concern Level: Low

Regulatory Flags

inorganic opacifier buffering-agent fda_food_additive

Frequently Asked Questions

Is Kaolin Aluminum Hydroxide safe in cosmetics?

Chemically inert aluminum hydroxide used as opacifier and buffering agent; unlike soluble aluminum salts does not penetrate meaningfully; safe at typical cosmetic concentrations The EU classifies Kaolin Aluminum Hydroxide as "permitted". Safety rating: GOOD.

Is Kaolin Aluminum Hydroxide allowed in the EU?

Kaolin Aluminum Hydroxide EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.

What does Kaolin Aluminum Hydroxide do in cosmetics?

Kaolin Aluminum Hydroxide functions as: Opacifying, Emollient, Buffering. It is classified as a cosmetic ingredient in our database. CAS number: 21645-51-2.

What is the Margin of Safety for Kaolin Aluminum Hydroxide?

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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