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5-METHYL-BETA-IONONE.

Optional CAS 79-70-9 / PERFUMING

A fragrance ingredient belonging to the ionone family that provides scent characteristics in cosmetic formulations. This ketone compound is primarily valued for its perfuming properties but carries sensitization potential that requires careful concentration management.

perfuming

Science

Functions as a perfuming agent by interacting with olfactory receptors to provide fragrance. In predisposed individuals, it may trigger dermal sensitization through hapten-protein binding mechanisms, making it a controlled fragrance allergen.


Research

High confidence
Effective range 0.1–30%
Optimal

7.6%

Key findings

  1. 01 RIFM photoirritation studies at 10% concentration showed no phototoxic effects
  2. 02 IFRA sensitization assessment established category-specific concentration limits ranging from 0.1% to 30%

Transparency

Not commonly dusted

As a fragrance ingredient with established IFRA limits, dusting is uncommon since regulatory compliance requires proper concentration management


The Formula

Solubility
Oil
Optimal pH 4 – 8
0 7 14

Stability

Demonstrates high stability across various cosmetic matrices including soaps and detergents. Non-discoloring properties maintained when stored in cool, dark conditions to prevent ketone oxidation.

Conflicts

  • Strong oxidizing agents
  • Strong acids
  • Strong bases

Safety

CIR Status
Safe with restrictions
Max tested
7.6%
Sensitization risk Moderate

Regulated under RIFM and IFRA standards with concentration limits varying by product category. Maximum 7.6% for leave-on facial products, up to 30% permitted in fine fragrances.


Your Skin

Yes Normal
Yes Dry
Yes Oily
No Sensitive
Irritancy Low
Comedogenicity Low

Our Assessment

Optional

A functional fragrance ingredient with established safety parameters, suitable for most skin types except sensitive, requiring adherence to concentration limits.


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