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C18-24 ISOPARAFFIN.

Valuable CAS 1437280-85-7 / SOLVENT

A high-purity, synthetic hydrocarbon mixture that serves as a lightweight texture enhancer and barrier support agent. It provides a silky, non-greasy finish to complex formulations while ensuring active ingredients remain uniformly distributed.

Solvent Emollient Skin conditioning agent Texture enhancer

Science

It functions by creating a breathable, microscopic film on the stratum corneum that significantly limits transepidermal water loss (TEWL) without clogging pores. Additionally, its solvent properties allow for the precise solubilization of UV filters and pigments, ensuring an even application and enhanced sensory experience.


Research

High confidence
Effective range 1–20%
Optimal

10%

Key findings

  1. 01 Human Repeat Insult Patch Tests (HRIPT) conducted by the CIR (2010) confirmed that 100% concentration of isoparaffins caused no irritation or sensitization on healthy skin.
  2. 02 Clinical trials involving over 200 subjects demonstrated that formulations containing up to 50% concentration remained non-sensitizing and non-irritating.

Transparency

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

As a functional solvent and emollient, this ingredient is rarely 'dusted' for marketing claims; it is typically used at functional levels (1-20%) to achieve specific textural and stabilization goals.


The Formula

Solubility
Oil
Optimal pH 3 – 11
0 7 14

Stability

Chemically inert and highly resistant to oxidation. It remains stable across a broad pH spectrum, making it ideal for both acidic and alkaline environments.

Synergies

  • Organic UV filters
  • Mineral pigments
  • Hydrophobic emollients

Conflicts

  • Water-only systems without emulsifiers
  • Strong oxidizing agents

Safety

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

The CIR Expert Panel indicates safety up to 90% in specialized solvent applications, though standard cosmetic usage is significantly lower.


Your Skin

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

Our Assessment

Valuable

An exceptionally stable and non-irritating emollient that bridges the gap between effective barrier protection and elegant product texture.


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