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C9-12 ISOPARAFFIN.

Valuable CAS - / SOLVENT, VISCOSITY CONTROLLING

A high-purity, synthetic hydrocarbon that serves as a volatile texture enhancer and lightweight emollient. It is specifically utilized in precision skincare to provide a sophisticated, 'weightless' skin feel while ensuring active ingredients are distributed evenly across the dermal surface.

Solvent Emollient Viscosity Controlling Texture Enhancer

Science

Functions as a branched-chain aliphatic hydrocarbon that fills micro-gaps between corneocytes to instantly smooth texture. It creates a breathable, semi-occlusive barrier that limits transepidermal water loss (TEWL) before evaporating cleanly, leaving no greasy residue behind.


Research

High confidence
Effective range 0.0001–90%
Optimal

N/A

Key findings

  1. 01 A 2012 CIR Expert Panel review of 24 isoparaffin variations confirmed the ingredient is non-genotoxic and lacks reproductive toxicity, even at high concentrations.
  2. 02 Comparative irritation studies published in the Journal of Applied Toxicology indicate that C9-12 molecular chains are significantly more skin-compatible and less irritating than lower molecular weight hydrocarbon solvents.

Transparency

Not commonly dusted
Min. effective
1%
Red flag below
0.5%

As a functional solvent and texture modifier rather than a primary active, it is rarely 'dusted' for marketing claims; its inclusion is typically driven by the structural requirements of the formulation's spreadability and dry-down time.


The Formula

Solubility
Oil
Optimal pH 3 – 9
0 7 14

Stability

Highly chemically inert and stable against hydrolysis. Due to its high volatility, it requires airtight packaging to maintain formula integrity and prevent evaporation over time.

Synergies

  • Lipophilic active ingredients
  • Mineral UV filters
  • Silicone elastomers

Conflicts

  • Strong oxidizing agents
  • Strong acids under high thermal conditions

Safety

CIR Status
Safe as used
Max tested
90%
Pregnancy
Safe
Sensitization risk Low

Recognized by the FDA as a direct food additive for fruit coatings, highlighting its high safety profile and lack of systemic toxicity.


Your Skin

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

Our Assessment

Valuable

An exceptionally safe and inert fluid that optimizes the delivery and sensory experience of complex skincare formulations without clogging pores.


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