Phytosteryl Isostearyl Dimer Dilinoleate

What is Phytosteryl Isostearyl Dimer Dilinoleate?

Phytosteryl Isostearyl Dimer Dilinoleate is a large-molecule ester formed by combining phytosterols—sterols extracted from plant oils—with dimerized linoleic acid and isostearyl alcohol. This botanical-origin ingredient falls into the emollient and conditioning agent category in cosmetics, particularly color cosmetics, lip products, and hair care. It functions by creating a flexible, non-greasy film on skin and hair, which minimizes friction, enhances slip, and promotes even adhesion of pigments and powders. In solid formats like lipsticks or compacts, it binds particles for structural integrity and longevity. Its high molecular weight helps regulate product thickness, preventing separation while delivering a lightweight, velvety sensory profile that supports moisture balance without heaviness.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 1 View on EWG →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Binder
Helps hold solid ingredients together to form cohesive tablets, compacts, or sticks, improving pressability, integrity, and wear of the finished product.
Hair conditioning
Improves softness, shine, and manageability by reducing friction and static; commonly achieved with cationic agents, silicones, oils, or conditioning polymers.
Emollient
Softens and smooths skin by filling in surface roughness and improving slip; can also help reduce moisture loss when paired with occlusives and film formers.
Skin conditioning agent
Maintains skin softness, smoothness, and flexibility.
Viscosity controlling agent
Adjusts thickness to the desired level for stability and usability, improving dispensing, suspension, and texture across many formulation types.
Binding
Provides cohesion by helping ingredients stick together, improving the strength and integrity of pressed powders, tablets, or solid bars.

Benefits

Provides emollience to soften skin and hair surfaces, improving smoothness and shine.

Enhances product cohesion in makeup for better wear and application.

Adjusts formula viscosity for stable, user-friendly textures in creams and conditioners.

Who It's For

A quick guide for who this ingredient may suit (and who should be cautious).

Who May Benefit Who Should Avoid
Users with dry skin desiring gentle softening and hydration support.
People with known allergies to plant sterols or fatty acid derivatives.
Individuals with unruly hair seeking reduced friction and manageability.
Those who have reacted to similar lipid esters in the past.
Fans of long-lasting lip and powder products for improved adherence.
Individuals with ultra-sensitive skin opting for minimalistic formulas.

Safety Notes

  • Considered low hazard with no significant irritation risks reported.
  • Non-comedogenic profile supports use across skin types including acne-prone.

Frequently Asked Questions about Phytosteryl Isostearyl Dimer Dilinoleate

What does this ingredient do in cosmetics?

It binds solids, conditions skin and hair, and controls thickness for smooth, stable products.

Is it suitable for sensitive skin?

Yes, it shows low irritation potential and suits most skin types.

Does it contribute to acne?

No, with a comedogenic rating of zero, it avoids pore blockage.