Ingredient review
Sodium PEG-50 Hydrogenated Castor Oil Succinate
INCI: SODIUM PEG-50 HYDROGENATED CASTOR OIL SUCCINATE
A gentle, semi-synthetic surfactant that effectively cleanses without stripping the skin, making it a good choice for sensitive or dry skin types.
In plain English
This ingredient is a mild soap-like molecule that helps water mix with oil and dirt so they can be rinsed away. It is made from castor oil that has been chemically modified to be water-friendly and gentle on the skin. Unlike harsher detergents, it cleans without leaving your skin feeling tight or dry.
Review score
Safety, usefulness, and evidence
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
Quick decision guide
Useful, but context matters
Sodium PEG-50 Hydrogenated Castor Oil Succinate 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 Sodium PEG-50 Hydrogenated Castor Oil Succinate.
- 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
lowLess likely to sting, burn, or bother most users, though sensitive skin can still react.
Clogging risk
lowLess likely to feel heavy or contribute to clogged pores for most skin types.
Evidence level
moderateThere is useful support, but formula details and claim strength still matter.
What it is
A semi-synthetic surfactant created by reacting hydrogenated castor oil with polyethylene glycol (PEG) and succinic acid. The result is a large molecule that can surround oil droplets and lift them away from the skin while remaining mild.
How it works
In a cosmetic product, it reduces the surface tension between water and oil, allowing the product to emulsify sebum, makeup, and environmental grime. Its large molecular structure makes it less penetrating and therefore less irritating than smaller surfactants.
Pros
Very gentle on skin
Its large molecular size means it stays on the surface and doesn't penetrate, reducing the risk of irritation and dryness.
Effective emulsifier
It helps blend oil and water phases in a formula, creating a stable, creamy texture that feels luxurious and rinses off easily.
Cons and cautions
Contains PEG
PEG compounds are processed with ethylene oxide, which can leave trace impurities. However, cosmetic-grade PEGs are purified to safe levels.
Moderate cleansing power
It may not fully remove heavy, long-wear makeup or sunscreen in a single wash, so a double-cleansing routine might be needed.
Best for
- People with dry or sensitive skin
- Those looking for a mild daily cleanser
Use caution if
- Individuals with known sensitivity to PEG derivatives
Usage tips
Safety summary
Sodium PEG-50 Hydrogenated Castor Oil Succinate is considered safe for use in cosmetics at typical concentrations. The PEG component is purified to remove harmful byproducts, and the ingredient has a low irritation and comedogenic profile.
Research notes
Safety assessments by the Cosmetic Ingredient Review (CIR) panel have concluded that PEG derivatives of hydrogenated castor oil are safe when formulated to meet purity standards. Studies show low skin irritation and sensitization potential.
Common label clues
- Typical concentration
- 1–10% in rinse-off products; lower in leave-on formulations
- Regulatory status
- Approved for use in cosmetics in the EU, US, and other major markets. PEG derivatives are regulated to ensure low levels of impurities like 1,4-dioxane.
- Common uses
- Facial cleansers, Body washes, Shampoos, Makeup removers
- Environmental note
- As a semi-synthetic ingredient, it is not readily biodegradable in all conditions, but it is generally considered safer for aquatic life than many traditional surfactants.
Good to know
- Often found in sulfate-free cleansers as a primary or secondary surfactant.
- The 'PEG-50' indicates the number of ethylene oxide units, which affects its water solubility and mildness.
Common questions
What is Sodium PEG-50 Hydrogenated Castor Oil Succinate in beauty products?
This ingredient is a mild soap-like molecule that helps water mix with oil and dirt so they can be rinsed away. It is made from castor oil that has been chemically modified to be water-friendly and gentle on the skin. Unlike harsher detergents, it cleans without leaving your skin feeling tight or dry.
What does Sodium PEG-50 Hydrogenated Castor Oil Succinate do in a beauty product?
In a cosmetic product, it reduces the surface tension between water and oil, allowing the product to emulsify sebum, makeup, and environmental grime. Its large molecular structure makes it less penetrating and therefore less irritating than smaller surfactants.
Is Sodium PEG-50 Hydrogenated Castor Oil Succinate safe for most people?
Sodium PEG-50 Hydrogenated Castor Oil Succinate is considered safe for use in cosmetics at typical concentrations. The PEG component is purified to remove harmful byproducts, and the ingredient has a low irritation and comedogenic profile.
Who should be careful with Sodium PEG-50 Hydrogenated Castor Oil Succinate?
Individuals with known sensitivity to PEG derivatives
Research sources
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.