Ingredient review
Sodium p-Chloro-m-Cresol
INCI: SODIUM P-CHLORO-M-CRESOL
An effective preservative but can be irritating for sensitive skin, especially at higher concentrations.
In plain English
Sodium p-Chloro-m-Cresol is a lab-made preservative added to cosmetics to stop bacteria, yeast, and mold from growing. It helps keep products safe to use over time. However, it can sometimes cause skin irritation or allergic reactions, especially in people with sensitive skin or when used in high amounts.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is useful, but some claims depend heavily on the formula.
Main practical flags: irritation is moderate; clogging risk is low.
- Source
- synthetic
- Evidence
- moderate
- Irritation
- moderate
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Sodium p-Chloro-m-Cresol can be useful, but watch for some irritation potential.
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 p-Chloro-m-Cresol.
- 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
moderateCan bother some users, especially with frequent use, damaged skin, or strong companion ingredients.
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 synthetic chlorinated phenol compound used as a preservative in cosmetics and personal care products.
How it works
It disrupts the cell walls of microorganisms, preventing them from growing and multiplying, which extends the shelf life of the product.
Pros
Effective preservation
Stops a wide range of microbes from growing, keeping your product safe and fresh for longer.
Low concentration needed
Works well even at small amounts, so it doesn't overpower the formula.
Cons and cautions
Can irritate sensitive skin
May cause redness, itching, or stinging, especially in people with reactive skin or on broken skin.
Allergic potential
Some individuals may develop contact dermatitis or allergic reactions over time.
Best for
- People with normal to oily skin
- Those using rinse-off products like cleansers
Use caution if
- Individuals with sensitive or eczema-prone skin
- Anyone with known allergies to chlorinated preservatives
Usage tips
Safety summary
Generally safe for most people in rinse-off products at low concentrations, but can cause irritation or allergic reactions in sensitive individuals. Avoid on broken or damaged skin.
Research notes
Studies confirm its antimicrobial efficacy but also note moderate skin sensitization potential. Regulatory bodies have set safe concentration limits.
Common label clues
- Typical concentration
- Up to 0.5% in rinse-off products; lower in leave-on formulations
- Regulatory status
- Approved for use in cosmetics in the EU and US at concentrations up to 0.5% in rinse-off products; restrictions apply in leave-on products.
- Common uses
- Rinse-off products like cleansers and shampoos, Leave-on products at low concentrations
- Environmental note
- Chlorinated phenols can be persistent in the environment; however, cosmetic use is typically at low concentrations.
Good to know
- This ingredient is sometimes listed as Chlorocresol on labels.
- It is banned or restricted in some countries for leave-on products due to irritation concerns.
Common questions
What is Sodium p-Chloro-m-Cresol in beauty products?
Sodium p-Chloro-m-Cresol is a lab-made preservative added to cosmetics to stop bacteria, yeast, and mold from growing. It helps keep products safe to use over time. However, it can sometimes cause skin irritation or allergic reactions, especially in people with sensitive skin or when used in high amounts.
What does Sodium p-Chloro-m-Cresol do in a beauty product?
It disrupts the cell walls of microorganisms, preventing them from growing and multiplying, which extends the shelf life of the product.
Is Sodium p-Chloro-m-Cresol safe for most people?
Generally safe for most people in rinse-off products at low concentrations, but can cause irritation or allergic reactions in sensitive individuals. Avoid on broken or damaged skin.
Who should be careful with Sodium p-Chloro-m-Cresol?
Individuals with sensitive or eczema-prone skin Anyone with known allergies to chlorinated preservatives
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.