Cerium Oxide

INCI: CERIUM OXIDE

CAS Number
1306-38-3
Function
Skin Protecting, Bulking Agent
Safety Rating
MODERATE

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status permitted
๐Ÿ‡บ๐Ÿ‡ธ US Status permitted
US Notes Not approved as active sunscreen ingredient; permitted as cosmetic inert/colorant ingredient

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

Safety Data

Margin of Safety (MoS)
not established
Dermal Absorption
negligible
Sensitization
none

Calculate MoS for your specific formulation with the MoS Calculator.

Expert Verdict

Nano form requires Article 16 notification and SCCS nano evaluation; inhalation risk in spray products

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Concern Level: Moderate

Frequently Asked Questions

Is Cerium Oxide safe in cosmetics?

Nano form requires Article 16 notification and SCCS nano evaluation; inhalation risk in spray products The EU classifies Cerium Oxide as "permitted". Safety rating: MODERATE.

Is Cerium Oxide allowed in the EU?

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

What does Cerium Oxide do in cosmetics?

Cerium Oxide functions as: Skin Protecting, Bulking Agent. It is classified as a cosmetic ingredient in our database. CAS number: 1306-38-3.

What is the Margin of Safety for Cerium Oxide?

not established 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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