Ceria/Silica

INCI: CERIA/SILICA

CAS Number
Not assigned (composite material)
Function
UV Absorber
Safety Rating
MODERATE

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status permitted
๐Ÿ‡บ๐Ÿ‡ธ US Status permitted
US Notes Not listed in FDA's OTC Sunscreen Monograph (21 CFR 352); cannot be used as an active sunscreen ingredient in the US

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

Safety Data

Margin of Safety (MoS)
not established
Dermal Absorption
low
Sensitization
low

Calculate MoS for your specific formulation with the MoS Calculator.

Expert Verdict

Nano-form concerns with cerium oxide nanoparticles; if nano-sized, triggers EU nano-notification requirements under Article 16 of EC 1223/2009; not approved as UV filter in EU or US; inhalation toxicity concerns for spray products.

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Concern Level: High

Frequently Asked Questions

Is Ceria/Silica safe in cosmetics?

Nano-form concerns with cerium oxide nanoparticles; if nano-sized, triggers EU nano-notification requirements under Article 16 of EC 1223/2009; not approved as UV filter in EU or US; inhalation toxicity concerns for spray products. The EU classifies Ceria/Silica as "permitted". Safety rating: MODERATE.

Is Ceria/Silica allowed in the EU?

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

What does Ceria/Silica do in cosmetics?

Ceria/Silica functions as: UV Absorber. It is classified as a cosmetic ingredient in our database. CAS number: Not assigned (composite material).

What is the Margin of Safety for Ceria/Silica?

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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