Ingredient review
C20-22 Pareth-30
INCI: C20-22 PARETH-30
A gentle synthetic emulsifier that helps mix oil and water, commonly used in cleansers and creams with a low irritation profile.
In plain English
C20-22 Pareth-30 is a man-made ingredient that helps oil and water blend together in products like cleansers and lotions. It belongs to a family of mild surfactants (cleansing agents) that are less likely to strip your skin's natural moisture barrier compared to harsher soaps. Think of it as a gentle bridge that keeps your product smooth and stable.
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
- synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
C20-22 Pareth-30 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 C20-22 Pareth-30.
- 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
C20-22 Pareth-30 is a polyethylene glycol (PEG) derivative of a mixture of synthetic fatty alcohols with 20 to 22 carbon atoms. It is a non-ionic surfactant, meaning it doesn't carry an electrical charge, which makes it very compatible with other ingredients and gentle on skin.
How it works
In a cosmetic product, C20-22 Pareth-30 reduces the surface tension between oil and water, allowing them to mix into a stable emulsion. This prevents your lotion or cream from separating into oily and watery layers. In cleansers, it helps lift dirt and makeup from the skin so they can be rinsed away without harsh scrubbing.
Pros
Gentle on skin
As a non-ionic surfactant, it cleans without disrupting the skin's natural barrier, making it suitable for daily use.
Excellent emulsifier
It creates stable, smooth emulsions that keep your lotions and creams from separating, ensuring consistent texture and performance.
Cons and cautions
Synthetic origin
It is manufactured through chemical processes, which may not appeal to those preferring natural or plant-based ingredients.
Potential trace impurities
As an ethoxylated ingredient, it can contain trace amounts of 1,4-dioxane if not properly purified, though cosmetic-grade versions are typically safe.
Best for
- People with normal to combination skin looking for gentle cleansers
- Anyone using stable, non-separating lotions or creams
Use caution if
- Those with known sensitivity to PEG compounds or ethoxylated ingredients
- Individuals seeking 100% natural or organic formulations
Usage tips
Safety summary
C20-22 Pareth-30 is considered safe for use in cosmetics at typical concentrations. The main safety concern is potential contamination with 1,4-dioxane, but reputable manufacturers purify their ingredients to meet regulatory limits. It has a low irritation and comedogenic risk.
Research notes
Research on C20-22 Pareth-30 specifically is limited, but the broader class of ethoxylated alcohols has been studied for safety. The Cosmetic Ingredient Review (CIR) panel has reviewed similar PEG compounds and found them safe as used in cosmetics. No significant adverse effects are reported in normal use.
Common label clues
- Typical concentration
- 0.5% to 5% in rinse-off products; lower in leave-on products
- Regulatory status
- Approved for use in cosmetics in the US (FDA), EU (CosIng), and many other regions. Manufacturers must ensure low levels of 1,4-dioxane per safety guidelines.
- Common uses
- Cleansers, Shampoos, Body washes, Lotions, Creams
- Environmental note
- As a synthetic surfactant, it may not be readily biodegradable, but many modern formulations are designed to minimize environmental impact.
Good to know
- C20-22 Pareth-30 is part of the 'Pareth' family, where the number (30) indicates the average number of ethylene oxide units
- It is often used in combination with other emulsifiers to fine-tune product feel
Common questions
What is C20-22 Pareth-30 in beauty products?
C20-22 Pareth-30 is a man-made ingredient that helps oil and water blend together in products like cleansers and lotions. It belongs to a family of mild surfactants (cleansing agents) that are less likely to strip your skin's natural moisture barrier compared to harsher soaps. Think of it as a gentle bridge that keeps your product smooth and stable.
What does C20-22 Pareth-30 do in a beauty product?
In a cosmetic product, C20-22 Pareth-30 reduces the surface tension between oil and water, allowing them to mix into a stable emulsion. This prevents your lotion or cream from separating into oily and watery layers. In cleansers, it helps lift dirt and makeup from the skin so they can be rinsed away without harsh scrubbing.
Is C20-22 Pareth-30 safe for most people?
C20-22 Pareth-30 is considered safe for use in cosmetics at typical concentrations. The main safety concern is potential contamination with 1,4-dioxane, but reputable manufacturers purify their ingredients to meet regulatory limits. It has a low irritation and comedogenic risk.
Who should be careful with C20-22 Pareth-30?
Those with known sensitivity to PEG compounds or ethoxylated ingredients Individuals seeking 100% natural or organic formulations
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.