Ingredient review

PEG-200 Castor Oil

INCI: PEG-200 Castor Oil

A gentle, water-soluble emulsifier that helps cleanse without stripping the skin, but may be too heavy for very oily or acne-prone types in high concentrations.

beautyskincaresurfactant

In plain English

PEG-200 Castor Oil is a modified version of castor oil that has been made water-soluble by adding polyethylene glycol (PEG) chains. This allows it to mix oil and water, making it useful in cleansers and shampoos to remove dirt and makeup without leaving a greasy residue. It's considered gentle and non-irritating for most skin types.

Review score

Safety, usefulness, and evidence

4.0Good

4.0/ 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-200 Castor Oil 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.

Step 1Start with the score, then check the irritation and clogging risk before judging PEG-200 Castor Oil.
Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
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 ingredient created by reacting castor oil with ethylene oxide to form a water-soluble emulsifier. It belongs to the PEG (polyethylene glycol) family and is commonly used in rinse-off products.

How it works

It reduces the surface tension between oil and water, allowing them to blend. In cleansers, it helps lift and suspend oils, dirt, and makeup so they can be rinsed away easily. Its water-solubility means it doesn't leave a heavy film on the skin.

Pros

Gentle on skin

PEG-200 Castor Oil is a mild surfactant that cleanses without stripping the skin's natural moisture barrier, making it suitable for daily use.

Water-soluble

Unlike plain castor oil, this version rinses cleanly away without leaving a greasy residue, which is ideal for rinse-off cleansers.

Cons and cautions

Potential for impurities

During manufacturing, PEG compounds can contain trace amounts of 1,4-dioxane, a possible carcinogen. However, reputable brands use purification steps to minimize this risk.

Not ideal for very oily skin

In high concentrations, it may feel slightly heavy or rich for those with extremely oily or acne-prone skin, though it is generally well-tolerated.

Best for

People with normal to dry skin
Those looking for a gentle, non-stripping cleanser

Use caution if

Individuals with very oily or acne-prone skin who prefer sulfate-free, lightweight cleansers
Those with known sensitivity to PEG compounds

Usage tips

Use in rinse-off products like cleansers and shampoos for best results; avoid high concentrations in leave-on products if you have oily skin.

Pair with other mild surfactants to create a balanced, non-stripping cleansing formula.

Safety summary

PEG-200 Castor Oil is considered safe for use in cosmetics at typical concentrations. The main concern is potential contamination with 1,4-dioxane, but this is minimized through purification. It has low irritation and comedogenic potential for most skin types.

Research notes

The Cosmetic Ingredient Review (CIR) panel has reviewed PEG compounds and found them safe for cosmetic use when formulated properly. Studies show low skin irritation and sensitization potential. No significant research specifically on PEG-200 Castor Oil is available, but it is similar to other PEG castor oil derivatives.

Common label clues

Typical concentration: 1-10% in rinse-off products; lower in leave-on products
Regulatory status: Approved for use in cosmetics by the FDA and EU CosIng database. The Cosmetic Ingredient Review (CIR) panel has deemed PEG compounds safe when used as directed and when impurities are controlled.
Common uses: Cleansers, Shampoos, Body washes, Facial cleansers
Environmental note: PEG compounds are generally biodegradable, but their production involves ethylene oxide, which is derived from fossil fuels. Some consumers prefer plant-based alternatives.

Good to know

PEG-200 Castor Oil is often used in 'gentle' or 'hydrating' cleansers because it cleans without over-drying.
The '200' refers to the average number of ethylene oxide units in the PEG chain, which affects its water solubility and mildness.

Common questions

What is PEG-200 Castor Oil in beauty products?

What does PEG-200 Castor Oil do in a beauty product?

Is PEG-200 Castor Oil safe for most people?

Who should be careful with PEG-200 Castor Oil?

Individuals with very oily or acne-prone skin who prefer sulfate-free, lightweight cleansers Those with known sensitivity to PEG compounds

Research sources

Cosmetic Ingredient Review (CIR) - Safety of PEGsOpen EU CosIng Database - PEG-200 Castor OilOpen PubMed - Safety of PEG 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.