PEG-4 Diheptanoate

PEG / Ethoxylated

What is PEG-4 Diheptanoate?

PEG-4 Diheptanoate is a synthetic ester formed by reacting polyethylene glycol with four ethylene oxide units to diheptanoic acid, resulting in a low-viscosity, colorless oily liquid. Primarily used in rinse-off cosmetics like shampoos, body washes, and makeup removers, as well as light leave-on products such as lotions and serums. It functions as an emollient by depositing a thin lubricious film on the skin surface, enhancing slip and reducing friction without greasiness. As a surfactant, it decreases interfacial tension between oil and water, promoting even dispersion and mild foaming. In its emulsifying capacity, it forms micellar structures that prevent phase separation, ensuring product uniformity and spreadability. This multifunctional ingredient suits lightweight, non-tacky formulations due to its quick absorption and compatibility with diverse cosmetic bases.

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

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

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

Benefits

Delivers a smooth, silky skin feel by mimicking lipid barrier function.

Facilitates gentle cleansing through surface tension reduction in wash-off items.

Stabilizes oil-water mixtures for consistent texture in emulsions.

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 of lightweight cleansers needing mild foaming action.
People sensitive to ethoxylated compounds.
Individuals preferring non-greasy emollients in daily lotions.
Those seeking only plant-derived cosmetic ingredients.
Those formulating or using stable, spreadable cosmetic blends.
Users concerned about moderate hazard ratings from safety databases.

Safety Notes

  • Considered safe for cosmetic use by ingredient review experts with low comedogenic potential.
  • May contain trace impurities from manufacturing, but purified forms minimize risks.

Frequently Asked Questions about PEG-4 Diheptanoate

What products commonly contain PEG-4 Diheptanoate?

Found in shampoos, body washes, makeup removers, and light lotions for emollience and stability.

Is it suitable for oily skin types?

Yes, its low comedogenic rating and lightweight feel make it appropriate for non-pore-clogging formulas.

How does it differ from other PEGs?

Features four ethylene oxide units esterified with diheptanoic acid, offering specific lubricity and emulsifying properties.