Ingredient review
Diisobutyl Maleate
INCI: Diisobutyl Maleate
A lightweight synthetic emollient that helps products spread smoothly and leaves skin feeling soft without greasiness.
In plain English
Diisobutyl Maleate is a man-made oil-like ingredient added to lotions, creams, and sunscreens. It helps the product glide on your skin easily and leaves a silky, non-greasy feel. Think of it as a lightweight moisturizing helper that also helps other ingredients mix well together.
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
Diisobutyl Maleate 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 Diisobutyl Maleate.
- 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
Diisobutyl Maleate is a diester of maleic acid and isobutyl alcohol. It is a clear, colorless liquid that functions as an emollient and skin-conditioning agent in cosmetic formulations.
How it works
It sits on the surface of the skin, filling in tiny gaps between skin cells to create a smooth, soft feel. It also reduces the greasy or sticky sensation that some heavier oils can leave behind, and helps other active ingredients spread evenly.
Pros
Lightweight feel
Unlike heavier oils, Diisobutyl Maleate absorbs quickly and leaves a silky finish, making it ideal for daytime moisturizers and sunscreens.
Low irritation
It has a low irritation and comedogenic rating, so it is generally safe for sensitive and acne-prone skin when used in typical concentrations.
Cons and cautions
Synthetic origin
It is not a natural ingredient, which may be a drawback for consumers seeking plant-based or naturally derived formulations.
Limited long-term data
While short-term safety is well established, there is less published research on the effects of repeated, long-term exposure through skincare.
Best for
- People who prefer lightweight, fast-absorbing moisturizers
- Those with normal to oily skin looking for non-greasy hydration
Use caution if
- Individuals who strictly avoid synthetic ingredients in their skincare
Usage tips
Safety summary
Diisobutyl Maleate is considered safe for topical use in cosmetics at typical concentrations. It has low irritation and comedogenic potential, making it suitable for most skin types. However, as with any ingredient, patch testing is recommended for those with very sensitive skin.
Research notes
Safety assessments for maleate esters generally support their use as skin-conditioning agents. Specific studies on Diisobutyl Maleate are limited, but its chemical relatives have been reviewed by the Cosmetic Ingredient Review (CIR) and found safe in leave-on and rinse-off products.
Common label clues
- Typical concentration
- Typically 0.5% to 5%
- Regulatory status
- Approved for use in cosmetics in the US, EU, and many other regions. The Cosmetic Ingredient Review (CIR) panel has reviewed similar esters and found them safe at typical use levels.
- Common uses
- Moisturizers, Sunscreens, Makeup, Hair products
- Environmental note
- As a synthetic compound, its biodegradability and environmental impact are less studied than some plant-derived alternatives.
Good to know
- Diisobutyl Maleate is often used in combination with other emollients to fine-tune the texture of a product.
- It is considered safe for use in cosmetics by major regulatory bodies when used as directed.
Common questions
What is Diisobutyl Maleate in beauty products?
Diisobutyl Maleate is a man-made oil-like ingredient added to lotions, creams, and sunscreens. It helps the product glide on your skin easily and leaves a silky, non-greasy feel. Think of it as a lightweight moisturizing helper that also helps other ingredients mix well together.
What does Diisobutyl Maleate do in a beauty product?
It sits on the surface of the skin, filling in tiny gaps between skin cells to create a smooth, soft feel. It also reduces the greasy or sticky sensation that some heavier oils can leave behind, and helps other active ingredients spread evenly.
Is Diisobutyl Maleate safe for most people?
Diisobutyl Maleate is considered safe for topical use in cosmetics at typical concentrations. It has low irritation and comedogenic potential, making it suitable for most skin types. However, as with any ingredient, patch testing is recommended for those with very sensitive skin.
Who should be careful with Diisobutyl Maleate?
Individuals who strictly avoid synthetic ingredients in their skincare
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.