Silybin

INCI: SILYBIN

CAS Number
22888-70-6
Function
Antioxidant, skin conditioning, anti-aging (major active flavonolignan from milk thistle / *Silybum marianum*)
Safety Rating
EXCELLENT

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status permitted
๐Ÿ‡บ๐Ÿ‡ธ US Status permitted
US Notes Not restricted; GRAS-adjacent as a component of silymarin dietary supplements; permitted in cosmetics under general provisions

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

Safety Data

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

Calculate MoS for your specific formulation with the MoS Calculator.

Expert Verdict

โœ… Generally safe; perform patch test for sensitive individuals; GHS classification of silymarin (parent complex) notes H315/H319 skin/eye irritation at concentrate level โ€” not relevant at typical cosmetic use concentrations

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Concern Level: Low

Frequently Asked Questions

Is Silybin safe in cosmetics?

โœ… Generally safe; perform patch test for sensitive individuals; GHS classification of silymarin (parent complex) notes H315/H319 skin/eye irritation at concentrate level โ€” not relevant at typical cosmetic use concentrations The EU classifies Silybin as "permitted". Safety rating: EXCELLENT.

Is Silybin allowed in the EU?

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

What does Silybin do in cosmetics?

Silybin functions as: Antioxidant, skin conditioning, anti-aging (major active flavonolignan from milk thistle / *Silybum marianum*). It is classified as a cosmetic ingredient in our database. CAS number: 22888-70-6.

What is the Margin of Safety for Silybin?

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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