Ingredient review

PEG-60 Hydrogenated Castor Oil Triisostearate

INCI: PEG-60 HYDROGENATED CASTOR OIL TRIISOSTEARATE

A gentle emulsifier that helps mix water and oil in skincare products, generally well-tolerated but may be too heavy for very oily skin.

beautyskincareemulsifier

In plain English

This ingredient is a helper that allows water and oil to blend together smoothly in products like cleansers and moisturizers. It is made from castor oil that has been chemically modified to be more stable and mixable. In a formula, it prevents separation and gives a creamy texture. For most people, it is non-irritating and unlikely to clog pores, though those with very oily or acne-prone skin might find it slightly heavy in high concentrations.

Review score

Safety, usefulness, and evidence

3.8Good
3.8/ 5

Potentially useful with some tradeoffs

The evidence base is useful, but some claims depend heavily on the formula.

Risk flags are low for most users, though the finished product can still irritate.

Source
semi synthetic
Evidence
moderate
Irritation
low
Clogging risk
low
How reviews are scored

Quick decision guide

Useful, but context matters

PEG-60 Hydrogenated Castor Oil Triisostearate is generally a lower-concern ingredient when the full formula suits your skin.

Plain-English read

Treat this as a practical screening step before you compare products that contain this ingredient.

  1. Step 1Start with the score, then check the irritation and clogging risk before judging PEG-60 Hydrogenated Castor Oil Triisostearate.
  2. Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
  3. Step 3If a product stings, breaks you out, or worsens irritation, judge the finished formula and stop using it even if the ingredient scores well.

Score terms in plain English

Irritation risk

low

Less likely to sting, burn, or bother most users, though sensitive skin can still react.

Clogging risk

low

Less likely to feel heavy or contribute to clogged pores for most skin types.

Evidence level

moderate

There is useful support, but formula details and claim strength still matter.

What it is

A semi-synthetic emulsifier created by reacting hydrogenated castor oil with ethylene oxide and isostearic acid. It is a large molecule that sits at the boundary between oil and water droplets, keeping them mixed.

How it works

It reduces the surface tension between oil and water, allowing them to form a stable emulsion. This creates a smooth, uniform product that spreads easily and rinses off cleanly without leaving a greasy residue.

Pros

Gentle emulsifier

Works well at low concentrations, reducing the chance of irritation or clogged pores for most skin types.

Improves product feel

Creates a smooth, creamy texture that spreads easily and rinses clean, enhancing the user experience.

Cons and cautions

May feel heavy on oily skin

In high concentrations, it can leave a slight film that some with very oily skin find uncomfortable.

Ethoxylation concerns

The manufacturing process can produce trace amounts of 1,4-dioxane, a potential contaminant, though levels are typically low and regulated.

Best for

  • People with normal to dry skin
  • Those who use oil-based cleansers or makeup removers
  • Anyone looking for a stable, non-irritating formula

Use caution if

  • Individuals with very oily or acne-prone skin who prefer lightweight, non-emulsified products
  • Those strictly avoiding ethoxylated ingredients

Usage tips

Use in oil-based cleansers or balms for effective makeup removal without stripping.
Pair with a lightweight oil if you have combination skin to avoid a heavy feel.
Check the full ingredient list if you are sensitive to ethoxylated compounds.

Safety summary

Considered safe for cosmetic use at typical concentrations. The main safety concern is potential contamination with 1,4-dioxane, but reputable manufacturers keep levels well below regulatory limits. Irritation and comedogenicity are low for most users.

Research notes

Limited direct studies on this specific ingredient, but it is a well-established emulsifier in cosmetics. Safety assessments rely on general knowledge of PEG compounds and hydrogenated castor oil derivatives, which have a long history of safe use.

Common label clues

Typical concentration
0.5% to 5%
Regulatory status
Approved for use in cosmetics in the US, EU, and most major markets. The EU restricts 1,4-dioxane levels to 10 ppm in finished products.
Common uses
Cleansers, Makeup removers, Serums, Moisturizers
Environmental note
Derived from castor oil, a renewable resource, but the ethoxylation process uses ethylene oxide, which is energy-intensive and has environmental concerns.

Good to know

  • Often listed near the end of ingredient lists due to low use concentrations.
  • Common in Japanese and Korean beauty cleansing oils.
  • Not the same as plain hydrogenated castor oil, which is thicker and more waxy.

Common questions

What is PEG-60 Hydrogenated Castor Oil Triisostearate in beauty products?

This ingredient is a helper that allows water and oil to blend together smoothly in products like cleansers and moisturizers. It is made from castor oil that has been chemically modified to be more stable and mixable. In a formula, it prevents separation and gives a creamy texture. For most people, it is non-irritating and unlikely to clog pores, though those with very oily or acne-prone skin might find it slightly heavy in high concentrations.

What does PEG-60 Hydrogenated Castor Oil Triisostearate do in a beauty product?

It reduces the surface tension between oil and water, allowing them to form a stable emulsion. This creates a smooth, uniform product that spreads easily and rinses off cleanly without leaving a greasy residue.

Is PEG-60 Hydrogenated Castor Oil Triisostearate safe for most people?

Considered safe for cosmetic use at typical concentrations. The main safety concern is potential contamination with 1,4-dioxane, but reputable manufacturers keep levels well below regulatory limits. Irritation and comedogenicity are low for most users.

Who should be careful with PEG-60 Hydrogenated Castor Oil Triisostearate?

Individuals with very oily or acne-prone skin who prefer lightweight, non-emulsified products Those strictly avoiding ethoxylated ingredients

Research sources

Cosmetic Ingredient Review (CIR) - Safety of PEGsOpenEuropean Chemicals Agency (ECHA) - 1,4-Dioxane infoOpenPubMed - Castor oil derivatives in cosmeticsOpen

Ingredient reviews are educational and are not medical advice. Patch test new products and ask a licensed clinician about persistent irritation, allergies, pregnancy-specific questions, or diagnosed skin conditions.