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Moumoujus

OCTADECENE.

Avoid CAS 27070-58-2 / SOLVENT, VISCOSITY CONTROLLING

Octadecene is a long-chain hydrocarbon recognized for its potential as an emollient and solvent in cosmetic formulations. While its derivatives are used to enhance product texture and moisture retention, direct application of Octadecene has demonstrated significant skin irritancy in human studies.

Summary

emollient solvent

Science

Mechanism of Action

As a long-chain hydrocarbon, Octadecene is theorized to function by forming an occlusive film on the skin's surface. This barrier aids in reducing transepidermal water loss (TEWL), which can lead to enhanced skin barrier function and improved hydration, though this mechanism is primarily extrapolated from the behavior of its derivatives.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Key findings

  1. 01 In a human skin irritation study, 16 out of 18 subjects developed moderate to strong symptoms, including redness, swelling, and raised skin lesions, within 30 minutes of application. After 24 hours, 17 individuals still exhibited similar signs, with the effects extending beyond the initial application site in 9 cases.
  2. 02 A separate study involving 36 human volunteers concluded that 1-Octadecene does not possess sensitizing properties.

Transparency

Dusting Analysis

Not commonly dusted

Octadecene is an oil-soluble hydrocarbon and is not typically utilized in powder forms, thus dusting is not a relevant concern for this ingredient.

The Formula

Formulation

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

Octadecene is chemically stable under recommended storage conditions, and no specific optimal pH range for its stability in cosmetic formulations has been identified.

Conflicts

  • Strong oxidizing agents

Safety

Safety Profile

CIR Status
Not reviewed
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) and the Scientific Committee on Consumer Safety (SCCS) have not published specific safety assessments for Octadecene as a cosmetic ingredient. Safety data sheets indicate a risk of skin irritation and a warning, 'May be fatal if swallowed and enters airways' (H304). It is listed as 'ACTIVE' under the EPA TSCA Commercial Activity Status.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Avoid

Despite its theoretical emollient properties, Octadecene is strongly advised against for precision skincare due to documented high irritancy in human subjects and the absence of comprehensive safety assessments from regulatory bodies like CIR or SCCS.

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