Ingredient review
Dioleoyle Detolmonium Methosulfate
INCI: DIOLEOYL EDETOLMONIUM METHOSULFATE
A synthetic conditioning agent that reduces static and softens hair, but may cause irritation for sensitive scalps at higher concentrations.
In plain English
This ingredient is a type of positively charged molecule (a quaternary ammonium compound) that sticks to the negatively charged surface of hair and skin. It helps reduce frizz, static electricity, and makes hair feel smoother and softer. It also helps blend oil and water in formulas, acting as an emulsifier. Because it's a surfactant, it can be mildly cleansing, but it's mainly used for conditioning.
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
Dioleoyle Detolmonium Methosulfate 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 Dioleoyle Detolmonium Methosulfate.
- 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 quaternary ammonium salt derived from oleic acid (a fatty acid found in olive oil) and edetate (a chelating agent). It is designed to provide conditioning and antistatic properties in personal care products.
How it works
Its positively charged head binds to the negatively charged surfaces of hair and skin, forming a thin film that reduces friction and static. This film also helps lock in moisture and makes hair easier to detangle. As an emulsifier, it helps stabilize mixtures of oil and water in a product.
Pros
Effective antistatic agent
Reduces static electricity and flyaways, making hair smoother and easier to style, especially in dry or winter conditions.
Improves hair feel
Leaves hair feeling softer and more manageable without heavy buildup when used in moderate concentrations.
Cons and cautions
Potential irritation
At higher concentrations or with frequent use, it may cause mild irritation or itching on sensitive scalps.
Not fully biodegradable
As a synthetic quaternary compound, it may persist in the environment longer than some natural alternatives.
Best for
- People with dry, frizzy, or chemically treated hair
- Those looking for a gentle conditioning agent in rinse-off products
Use caution if
- Individuals with very sensitive or easily irritated scalps
- Those following a strictly natural or plant-based routine
Usage tips
Safety summary
Generally considered safe for use in rinse-off cosmetic products at typical concentrations. Mild irritation is possible for sensitive individuals. No known serious health risks from normal cosmetic use.
Research notes
Limited peer-reviewed studies specifically on this compound. Safety is inferred from similar quaternary ammonium compounds, which have been reviewed by the Cosmetic Ingredient Review (CIR) panel and found safe for rinse-off use.
Common label clues
- Typical concentration
- 0.1% to 2% in rinse-off formulations
- Regulatory status
- Approved for use in cosmetics in the EU, US, and many other regions. No specific restrictions beyond general cosmetic safety requirements.
- Common uses
- Conditioners, Hair masks, Leave-in treatments, Rinse-off cleansers
- Environmental note
- Quaternary ammonium compounds can be slow to biodegrade; some may accumulate in aquatic environments. Look for products with eco-friendly disposal practices.
Good to know
- This ingredient is often listed near the middle or end of an ingredient list, indicating moderate usage levels.
- It is not typically found in 'clean' or 'natural' beauty lines due to its synthetic origin.
Common questions
What is Dioleoyle Detolmonium Methosulfate in beauty products?
This ingredient is a type of positively charged molecule (a quaternary ammonium compound) that sticks to the negatively charged surface of hair and skin. It helps reduce frizz, static electricity, and makes hair feel smoother and softer. It also helps blend oil and water in formulas, acting as an emulsifier. Because it's a surfactant, it can be mildly cleansing, but it's mainly used for conditioning.
What does Dioleoyle Detolmonium Methosulfate do in a beauty product?
Its positively charged head binds to the negatively charged surfaces of hair and skin, forming a thin film that reduces friction and static. This film also helps lock in moisture and makes hair easier to detangle. As an emulsifier, it helps stabilize mixtures of oil and water in a product.
Is Dioleoyle Detolmonium Methosulfate safe for most people?
Generally considered safe for use in rinse-off cosmetic products at typical concentrations. Mild irritation is possible for sensitive individuals. No known serious health risks from normal cosmetic use.
Who should be careful with Dioleoyle Detolmonium Methosulfate?
Individuals with very sensitive or easily irritated scalps Those following a strictly natural or plant-based routine
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.