Ingredient review
PEG-44 Castor Oil
INCI: PEG-44 Castor Oil
A gentle emulsifier that helps mix oil and water in cleansers and shampoos, with a low risk of irritation.
In plain English
PEG-44 Castor Oil is a modified version of castor oil that has been treated with polyethylene glycol (PEG) to make it water-soluble. In skincare, it acts as an emulsifier, meaning it helps blend oil and water ingredients together so they don't separate in your bottle. It also helps cleanse by trapping dirt and oil so they rinse away easily.
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
PEG-44 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-44 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
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 ingredient created by reacting castor oil with ethylene oxide to form a water-soluble emulsifier. It is part of the PEG (polyethylene glycol) family, commonly used in rinse-off products.
How it works
It reduces the surface tension between oil and water, allowing them to mix into a stable emulsion. In cleansers, it surrounds and lifts away dirt, oil, and makeup so they can be rinsed off without stripping the skin.
Pros
Effective emulsifier
Helps oil and water mix smoothly, giving your cleanser a stable, pleasant texture that doesn't separate.
Gentle on skin
Compared to harsher sulfates, PEG-44 Castor Oil cleanses without stripping the skin's natural moisture barrier.
Cons and cautions
Not natural
It is semi-synthetic, so it won't appeal to those seeking 100% natural or plant-based ingredients.
Potential impurities
The PEG manufacturing process can leave trace amounts of ethylene oxide or 1,4-dioxane, though reputable brands purify their ingredients.
Best for
- People who use foaming cleansers or shampoos
- Those with normal to oily skin looking for gentle cleansing
Use caution if
- Those avoiding all PEG-derived ingredients
- People with known sensitivity to PEG compounds (rare)
Usage tips
Safety summary
PEG-44 Castor Oil is considered safe for use in cosmetics. The main concern is potential trace impurities from manufacturing, but these are tightly regulated and minimized by quality suppliers. It has a low irritation and comedogenic risk.
Research notes
The Cosmetic Ingredient Review (CIR) panel reviewed PEG castor oil derivatives and concluded they are safe as used in cosmetics. No significant human or animal studies show toxicity at typical exposure levels.
Common label clues
- Typical concentration
- 1-10%
- Regulatory status
- Approved for use in cosmetics in the US, EU, and many other regions. The CIR panel has deemed it safe at concentrations up to 100% in rinse-off products.
- Common uses
- Cleansers, Shampoos, Body washes, Makeup removers
- Environmental note
- PEG compounds are generally biodegradable, but the manufacturing process has environmental considerations due to the use of ethylene oxide.
Good to know
- PEG-44 Castor Oil is considered safe by the Cosmetic Ingredient Review (CIR) panel at typical use levels
- It is not the same as unmodified castor oil, which is thick and not water-soluble
Common questions
What is PEG-44 Castor Oil in beauty products?
PEG-44 Castor Oil is a modified version of castor oil that has been treated with polyethylene glycol (PEG) to make it water-soluble. In skincare, it acts as an emulsifier, meaning it helps blend oil and water ingredients together so they don't separate in your bottle. It also helps cleanse by trapping dirt and oil so they rinse away easily.
What does PEG-44 Castor Oil do in a beauty product?
It reduces the surface tension between oil and water, allowing them to mix into a stable emulsion. In cleansers, it surrounds and lifts away dirt, oil, and makeup so they can be rinsed off without stripping the skin.
Is PEG-44 Castor Oil safe for most people?
PEG-44 Castor Oil is considered safe for use in cosmetics. The main concern is potential trace impurities from manufacturing, but these are tightly regulated and minimized by quality suppliers. It has a low irritation and comedogenic risk.
Who should be careful with PEG-44 Castor Oil?
Those avoiding all PEG-derived ingredients People with known sensitivity to PEG compounds (rare)
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.