Dimethicone PEG-7 Isostearate

PEG / Ethoxylated

What is Dimethicone PEG-7 Isostearate?

Dimethicone PEG-7 Isostearate is a synthetic copolymer made by modifying dimethicone, a silicone polymer, with seven units of polyethylene glycol and isostearic acid. This structure gives it hydrophilic and lipophilic properties, making it ideal as a non-ionic emulsifier in cosmetics. It appears in skincare emulsions, hair conditioners, and makeup, where it bridges water and oil phases to create stable, creamy textures that resist separation. By lowering interfacial tension, it promotes even ingredient dispersion and enhances application glide. Its conditioning aspect leaves a protective, non-greasy film on skin and hair, aiding smoothness without heaviness. Primarily used in rinse-off and leave-on products at low levels for optimal performance.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 3 View on EWG →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

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.

Benefits

Provides emollient effects to smooth and soften skin texture

Enhances hair conditioning for better manageability and reduced friction

Supports stable emulsions for improved product spreadability and feel

Who It's For

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

Who May Benefit Who Should Avoid
Individuals with dry skin needing added slip and softness
Those sensitive to PEG or ethoxylated compounds
People with frizzy or tangled hair seeking conditioning
People avoiding synthetic silicones in routines
Users of emulsion-based products like lotions and creams
Individuals wary of potential impurities in processed ingredients

Safety Notes

  • Low comedogenic potential, suitable for acne-prone skin
  • Moderate overall safety profile with limited irritation reports

Frequently Asked Questions about Dimethicone PEG-7 Isostearate

What does it do in products?

Acts as an emulsifier to blend water and oils, while providing emollient and conditioning benefits for smooth feel.

Is it suitable for sensitive skin?

Typically low irritation potential, but patch test if sensitive to PEGs.

Does it affect hair health?

Improves softness and shine by reducing friction, common in conditioning formulas.