Ingredient review
Sodium Dilinoleate
INCI: Sodium Dilinoleate
A mild, soap-free cleanser that effectively removes dirt and makeup without stripping the skin's natural moisture barrier.
In plain English
Sodium Dilinoleate is a gentle cleansing ingredient made from linoleic acid (a fatty acid found in plant oils). It works like a mild soap but is much less drying. It helps water mix with oil and dirt so they can be rinsed away, leaving skin clean but not tight or irritated. Because it's derived from natural fatty acids, it's often used in sulfate-free and sensitive-skin cleansers.
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 Dilinoleate 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 Dilinoleate.
- 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
Sodium Dilinoleate is the sodium salt of dilinoleic acid, a dimer of linoleic acid. It is a mild anionic surfactant that acts as a cleansing and emulsifying agent in cosmetic formulations.
How it works
It reduces the surface tension between water and oil, allowing oil-based impurities (like sebum and makeup) to be lifted from the skin and rinsed away with water. Its large molecular structure makes it less penetrating and less irritating than smaller surfactants like sodium lauryl sulfate.
Pros
Very gentle on skin
Its large molecular structure means it doesn't penetrate deeply, reducing irritation and dryness — ideal for compromised or sensitive skin.
Effective yet mild cleansing
Removes oil-based impurities like makeup and sunscreen without over-stripping, helping maintain a healthy moisture barrier.
Cons and cautions
Low foam
Produces minimal lather compared to sulfate cleansers, which some users may find less satisfying or feel like it's not cleaning thoroughly.
Requires thorough rinsing
If not rinsed well, it can leave a slight residue or oily feel on the skin, especially in hard water.
Best for
- People with dry or sensitive skin
- Those seeking a sulfate-free cleanser
- Anyone who wears light makeup or sunscreen daily
Use caution if
- Individuals with very oily skin who prefer a high-foam cleanser
- Those with a known allergy to linoleic acid derivatives (rare)
Usage tips
Safety summary
Sodium Dilinoleate is considered safe for use in cosmetics. It has low skin irritation and sensitization potential, making it suitable for sensitive skin. No significant safety concerns have been identified in cosmetic concentrations.
Research notes
While not as extensively studied as some common surfactants, available data and long-term use in formulations support its safety and mildness. It is recognized by cosmetic ingredient safety panels as a low-risk cleansing agent.
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. No specific concentration restrictions for rinse-off products.
- Common uses
- Facial cleansers, Micellar waters, Makeup removers, Body washes
- Environmental note
- Derived from plant-based linoleic acid, it is biodegradable and has a lower aquatic toxicity profile compared to many conventional surfactants.
Good to know
- Sodium Dilinoleate is often paired with other mild surfactants to boost cleansing power without increasing irritation.
- It is biodegradable and considered more environmentally friendly than some traditional surfactants.
Common questions
What is Sodium Dilinoleate in beauty products?
Sodium Dilinoleate is a gentle cleansing ingredient made from linoleic acid (a fatty acid found in plant oils). It works like a mild soap but is much less drying. It helps water mix with oil and dirt so they can be rinsed away, leaving skin clean but not tight or irritated. Because it's derived from natural fatty acids, it's often used in sulfate-free and sensitive-skin cleansers.
What does Sodium Dilinoleate do in a beauty product?
It reduces the surface tension between water and oil, allowing oil-based impurities (like sebum and makeup) to be lifted from the skin and rinsed away with water. Its large molecular structure makes it less penetrating and less irritating than smaller surfactants like sodium lauryl sulfate.
Is Sodium Dilinoleate safe for most people?
Sodium Dilinoleate is considered safe for use in cosmetics. It has low skin irritation and sensitization potential, making it suitable for sensitive skin. No significant safety concerns have been identified in cosmetic concentrations.
Who should be careful with Sodium Dilinoleate?
Individuals with very oily skin who prefer a high-foam cleanser Those with a known allergy to linoleic acid derivatives (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.