Methyl Alpha-Ionone Isomers

INCI: METHYL ALPHA-IONONE ISOMERS

CAS Number
Mixture of isomers (individual isomers include CAS 127-51-5 for alpha-isomethyl ionone)
Function
Fragrance ingredient
Safety Rating
MODERATE

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status restricted
๐Ÿ‡บ๐Ÿ‡ธ US Status permitted
US Notes Allowed. No specific restrictions, but IFRA guidelines apply for industry self-regulation

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

Classified as a skin sensitizer/allergen; one of the most frequently reported fragrance allergens in dermatological patch testing. Can cause allergic contact dermatitis in sensitized individuals. Violet/iris/woody scent profile; widely used in perfumery as an orris/violet note; the "isomers" designation covers multiple stereoisomeric forms with slightly different olfactory profiles

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Concern Level: Moderate

Regulatory Flags

potential-allergen fragrance-component

Frequently Asked Questions

Is Methyl Alpha-Ionone Isomers safe in cosmetics?

Classified as a skin sensitizer/allergen; one of the most frequently reported fragrance allergens in dermatological patch testing. Can cause allergic contact dermatitis in sensitized individuals. Violet/iris/woody scent profile; widely used in perfumery as an orris/violet note; the "isomers" designation covers multiple stereoisomeric forms with slightly different olfactory profiles The EU classifies Methyl Alpha-Ionone Isomers as "restricted". Safety rating: MODERATE.

Is Methyl Alpha-Ionone Isomers allowed in the EU?

Methyl Alpha-Ionone Isomers EU regulatory status: restricted. This is based on EU Regulation 1223/2009 and its amendments.

What does Methyl Alpha-Ionone Isomers do in cosmetics?

Methyl Alpha-Ionone Isomers functions as: Fragrance ingredient. It is classified as a cosmetic ingredient in our database. CAS number: Mixture of isomers (individual isomers include CAS 127-51-5 for alpha-isomethyl ionone).

What is the Margin of Safety for Methyl Alpha-Ionone Isomers?

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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