Basic Yellow 11

INCI: BASIC YELLOW 11

CAS Number
4208-80-4
Function
Hair dyeing (semi-permanent cationic dye)
Safety Rating
MODERATE

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status restricted
๐Ÿ‡บ๐Ÿ‡ธ US Status permitted
US Notes Exempt under coal-tar hair dye provision; caution statement required

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

Safety Data

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

Calculate MoS for your specific formulation with the MoS Calculator.

Expert Verdict

Methine-type dye; monitor for degradation products; subject to concentration limits under Annex III in EU.

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Concern Level: Moderate

Regulatory Flags

eu_banned_cosmetics eu_cosing_listed

Frequently Asked Questions

Is Basic Yellow 11 safe in cosmetics?

Methine-type dye; monitor for degradation products; subject to concentration limits under Annex III in EU. The EU classifies Basic Yellow 11 as "restricted". Safety rating: MODERATE.

Is Basic Yellow 11 allowed in the EU?

Basic Yellow 11 EU regulatory status: restricted. This is based on EU Regulation 1223/2009 and its amendments.

What does Basic Yellow 11 do in cosmetics?

Basic Yellow 11 functions as: Hair dyeing (semi-permanent cationic dye). It is classified as a cosmetic ingredient in our database. CAS number: 4208-80-4.

What is the Margin of Safety for Basic Yellow 11?

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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