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C8-9 ALKANE/CYCLOALKANE.

Valuable CAS 64742-49-0 / SOLVENT

A high-precision, volatile hydrocarbon solvent engineered to optimize the delivery and application of active skincare ingredients. It acts as a lightweight vehicle that ensures formulas spread evenly across the skin surface before evaporating to leave a weightless finish.

Solvent Viscosity-controlling agent Spreadability enhancer Film-former vehicle

Science

It functions by lowering the surface tension of the formulation, which facilitates a uniform distribution of film-formers and active agents. Due to its low boiling point of approximately 38°C (100°F), it flashes off quickly upon skin contact, leaving behind a dry-touch, non-greasy protective layer that enhances the adhesion of the product's primary ingredients.


Research

High confidence
Effective range 0.5–40%
Optimal

5%

Key findings

  1. 01 Demonstrated efficacy as a delivery vehicle in concentrations between 0.5% and 10.0% to improve the epidermal penetration of matrix metalloproteinase inhibitors.
  2. 02 Utilized at 15.0%-40.0% in protective coatings to achieve rapid drying times and a non-aqueous film without residual oiliness.

Transparency

Not commonly dusted
Min. effective
0.5%
Red flag below
0.1%

Because it is a functional solvent rather than a headline active, it is rarely 'dusted.' However, its presence at levels below 0.1% would likely render its viscosity-controlling and penetration-enhancing benefits negligible.


The Formula

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

Maintains high stability in anhydrous (water-free) environments. Requires cool storage in airtight containers due to its extreme volatility and flammability.

Synergies

  • Resins
  • Silicones
  • MMP inhibitors
  • Organic UV filters

Conflicts

  • Strong oxidizing agents
  • Liquid oxygen
  • Concentrated mineral acids

Safety

CIR Status
Safe as used
Pregnancy
Safe
Sensitization risk Low

Cosmetic-grade purity must ensure benzene content remains below 0.1% to comply with EU safety standards and prevent carcinogenic risks.


Your Skin

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Low
Comedogenicity Low

Our Assessment

Valuable

An essential formulation tool for achieving superior product spreadability and a weightless, dry-touch finish in high-performance skincare.


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