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C8-9 ISOPARAFFIN.

Valuable CAS 246538-71-6 / SOLVENT, VISCOSITY CONTROLLING

A high-purity, volatile branched-chain hydrocarbon that serves as a sophisticated solvent and texture enhancer. It provides a weightless, dry-touch finish by evaporating rapidly upon application, making it indispensable for elegant, non-greasy topical delivery.

solvent viscosity controlling texture enhancer volatizing agent

Science

It acts as a lightweight carrier that reduces the viscosity of formulas, ensuring uniform distribution of pigments and active oils across the skin's surface. Due to its specific molecular structure and low boiling point, it facilitates quick-setting properties in long-wear cosmetics while leaving a silky, breathable film that does not clog pores.


Research

High confidence
Effective range 5–40%
Optimal

20%

Key findings

  1. 01 Clinical evaluations conducted by the CIR Expert Panel in 2010 confirmed that concentration levels up to 40% are non-sensitizing and non-phototoxic for human skin.
  2. 02 Toxicological assessments on undiluted isoparaffin mixtures demonstrated zero evidence of dermal sensitization in guinea pig models.

Transparency

Not commonly dusted
Min. effective
5%
Red flag below
1%

As a functional solvent, it is rarely 'dusted' for marketing purposes; its presence is usually dictated by the required drying speed and spreadability of the final product. Concentrations below 5% may indicate it is used only as a minor processing aid.


The Formula

Solubility
Oil
Optimal pH 3 – 10
0 7 14

Stability

Exhibits excellent thermal stability and remains chemically inert across a wide pH spectrum. Must be stored in airtight environments to prevent premature evaporation.

Synergies

  • Silicone elastomers
  • Mineral pigments
  • UV filters

Conflicts

  • Strong oxidizing agents
  • Purely aqueous systems without emulsifiers

Safety

CIR Status
Safe as used
Max tested
40%
Pregnancy
Safe
Sensitization risk Low

Recognized as safe for cosmetic use; also permitted by the FDA for use in food coatings, highlighting its low toxicity profile.


Your Skin

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

Our Assessment

Valuable

An exceptionally stable and safe volatile carrier that enables the creation of high-performance, smudge-proof, and aesthetically pleasing skincare and cosmetic textures.


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