Pentaerythrityl Tetraisostearate

Benefits
Softening

What is Pentaerythrityl Tetraisostearate?

Pentaerythrityl tetraisostearate is a synthetic tetraester derived from pentaerythritol, a polyol produced via condensation of formaldehyde and acetaldehyde, esterified with four molecules of isostearic acid, a branched saturated fatty acid from vegetable oils. This bulky, non-polar structure imparts high stability, oxidative resistance, and a lightweight, non-greasy texture. Primarily used in color cosmetics like lipsticks and foundations, as well as creams and lotions, it functions as an emollient by lubricating the skin surface for smoother feel and minor barrier support. It binds pigments and waxes in sticks for cohesion and longevity. As a viscosity modifier, it thickens oils without stickiness, aiding spreadability. Emulsifying traits stabilize oil-in-water blends, while surfactant properties assist in dispersion. Overall, it enhances sensory qualities and product performance across anhydrous and emulsified systems.

Comedogenic Rating 2/5 Moderate risk
EWG Safety Rating 1 View on EWG →
PubChem View on PubChem →

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.
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.
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.
Emulsifying agent
Enables stable mixing of oil and water phases by forming an interfacial film, helping create lotions, creams, and cleansers with consistent texture.
Surfactant
Lowers surface tension to enable cleansing, emulsifying, and foaming; central to shampoos, body washes, and many emulsions and micellar systems.

Benefits

Provides softening effect for smoother skin feel.

Improves formula texture, spreadability, and stability.

Contributes to long-wear adhesion in solid cosmetics.

Who It's For

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

Who May Benefit Who Should Avoid
People with dry or mature skin seeking emollient smoothness.
Those with acne-prone or oily skin due to moderate comedogenic potential.
Users of makeup products for better wear and comfort.
People sensitive to heavy emollients in humid climates.
Individuals preferring rich yet non-greasy moisturizers.
Users wanting minimalistic, water-based formulations.

Safety Notes

  • Considered safe for use in cosmetics by expert reviews.
  • Low hazard rating with minimal irritation reports.

Frequently Asked Questions about Pentaerythrityl Tetraisostearate

What does it do in products?

Acts as emollient, binder, and viscosity controller for smooth texture and stability.

Is it safe for daily use?

Rated low hazard and safe in cosmetics by regulatory reviews.

Does it cause breakouts?

Moderate comedogenic rating of 2; may suit non-acne-prone skin better.