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7-HYDROXY-3,7-DIMETHYL-OCTANAL DISTILLATES.

Optional CAS 68909-04-6 / PERFUMING

A synthetic fragrance compound, primarily composed of hydroxycitronellal, that delivers a characteristic floral, lily-of-the-valley scent to cosmetic formulations. While effective for fragrance purposes, it belongs to the EU's list of 26 regulated fragrance allergens due to its potential to cause contact sensitization in susceptible individuals.

fragrance

Science

Functions purely as a sensory modifier by interacting with olfactory receptors to provide fragrance, offering no direct skin improvement benefits. Can potentially bind to skin proteins as a hapten, which may trigger delayed-type hypersensitivity reactions in predisposed individuals.


Research

High confidence
Effective range 0.1–3.6%
Optimal

N/A

Key findings

  1. 01 IFRA standards demonstrate concentrations above 1% in leave-on products significantly elevate contact dermatitis risk
  2. 02 Human patch testing at 100% concentration caused moderate irritation in 9% of volunteers (2/22 subjects)
  3. 03 In vitro keratinocyte studies at 20% concentration showed mild irritant potential

Transparency

Not commonly dusted

As a fragrance component with known allergenic potential, this ingredient is heavily regulated rather than dusted, with mandatory INCI disclosure requirements when present above 0.001% in leave-on products.


The Formula

Solubility
Both
Optimal pH 5 – 7
0 7 14

Stability

Highly vulnerable to oxidative degradation when exposed to air and light, requiring antioxidant protection such as BHT. Undergoes aldol condensation reactions in alkaline conditions above pH 7.

Synergies

  • Antioxidants like BHT for stability protection

Conflicts

  • Strong oxidizing agents
  • Alkaline ingredients
  • Primary amines (forms unstable Schiff bases)

Safety

CIR Status
Safe with restrictions
Max tested
3.6%
Sensitization risk Moderate

Classified among EU's 26 fragrance allergens requiring individual INCI listing above 0.001% in leave-on products and 0.01% in rinse-off formulations. IFRA usage restrictions apply based on product category.


Your Skin

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

Our Assessment

Optional

A regulated fragrance ingredient that serves its scenting purpose effectively but offers no skincare benefits while carrying moderate sensitization risk.


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