Isopropyl Stearate

Benefits
Softening

What is Isopropyl Stearate?

Isopropyl stearate is a synthetic ester formed from stearic acid, a common saturated fatty acid sourced from plant or animal fats, and isopropyl alcohol. Primarily used in skincare formulations like lotions, creams, and makeup products, it serves as an emollient and binding agent. In products, it functions by lowering surface friction, which creates a silky, non-greasy feel during application and helps ingredients adhere together for better product cohesion and spreadability. Its low molecular weight allows quick absorption without residue, making it ideal for lightweight textures. Cosmetic databases classify it as a skin conditioning agent that supports skin barrier function through hydration retention when combined with other moisturizers. Evidence from safety reviews confirms its mild profile, with minimal risk of pore clogging due to its non-comedogenic properties.

Comedogenic Rating 0/5 Low risk of clogging pores
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.
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.
Binding
Provides cohesion by helping ingredients stick together, improving the strength and integrity of pressed powders, tablets, or solid bars.
Skin conditioning agent
Maintains skin softness, smoothness, and flexibility.

Benefits

Softens and smooths skin surface for improved texture.

Enhances product slip and even application.

Helps maintain skin flexibility and moisture balance.

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 rough skin seeking lightweight hydration.
Individuals with rare allergies to fatty acid esters.
Individuals preferring non-greasy formulas in daily moisturizers.
People sensitive to isopropyl-based compounds.
Those using makeup products for better blendability and wear.
Those preferring completely natural or plant-derived ingredients only.

Safety Notes

  • Considered safe for cosmetic use by regulatory reviews.
  • Low potential for irritation or comedogenicity in typical concentrations.

Frequently Asked Questions about Isopropyl Stearate

What is isopropyl stearate used for in skincare?

It acts as an emollient to soften skin and a binder to improve product texture and stability.

Is isopropyl stearate safe for sensitive skin?

Yes, it shows low irritation potential based on cosmetic safety assessments.

Does isopropyl stearate cause acne?

No, its comedogenic rating is zero, making it unlikely to clog pores.