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TRIMETHYLHEXANOL.

Questionable CAS 3452-97-9 / FRAGRANCE, SOLVENT

Trimethylhexanol serves primarily as a cosmetic solvent, enhancing the dissolution and dispersion of other ingredients, and contributes to a product's fragrance profile. Despite being deemed safe for use at controlled concentrations, it presents a moderate risk of skin and eye irritation.

solvent fragrance

Science

Functioning as a solvent, Trimethylhexanol facilitates the integration and stability of various components within a formulation. It also acts as a fragrance agent, imparting a specific scent to personal care products.


Research

Low confidence
Effective range N/A
Optimal

N/A


Transparency

Not commonly dusted

As a liquid alcohol utilized for its solvent and fragrance properties, Trimethylhexanol is not associated with dusting or leaving visible residue on the skin.


The Formula

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

The ingredient demonstrates general stability, with no specific optimal pH range identified. It is critical to protect it from light exposure, as branched primary alcohols may form potentially explosive peroxides under such conditions.

Conflicts

  • strong acids
  • acid chlorides
  • acid anhydrides
  • oxidizing agents
  • exposure to light

Safety

CIR Status
Safe as used
Max tested
1.00%%
Sensitization risk Low

The RIFM Expert Panel assessed 3,5,5-trimethyl-1-hexanol as safe for its intended use, noting a systemic exposure of 0.99 μg/kg/day, which is well below the Threshold of Toxicological Concern (30 μg/kg/day) for repeated dose toxicity. Human maximization tests involving an 8% concentration did not indicate concerns for skin sensitization. However, aggregated GHS data reveal that 69.7% of reports indicate 'Causes skin irritation' and 64.3% report 'Causes serious eye irritation.' As a liquid alcohol, it has the potential to act as a primary skin irritant and may contribute to skin dryness or cracking with repeated application.


Your Skin

No Normal
No Dry
No Oily
No Sensitive
Irritancy Moderate
Comedogenicity Unknown

Our Assessment

Questionable

While effective as a solvent and fragrance within specified limits, the ingredient's moderate potential for skin irritation makes its inclusion in precision skincare formulations that prioritize skin comfort and health highly questionable.


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