Ingredient review
Bis(1-Methylheptyl) Maleate
INCI: BIS(1-METHYLHEPTYL) MALEATE
A lightweight, non-greasy emollient that helps products glide on smoothly without clogging pores.
In plain English
Bis(1-Methylheptyl) Maleate is a man-made oil-like ingredient that makes creams and lotions feel silky and spread easily on your skin. It doesn't leave a heavy or sticky residue, so it's often used in products that need a light, comfortable feel.
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
Bis(1-Methylheptyl) 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 Bis(1-Methylheptyl) 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
A synthetic ester derived from maleic acid and a branched-chain alcohol. It is a clear, colorless liquid that mimics the feel of natural oils but is more stable and less likely to go rancid.
How it works
It sits on the surface of the skin, filling in tiny gaps between skin cells to create a smooth, soft texture. It also helps other ingredients spread evenly and can reduce the whitish cast sometimes left by sunscreens.
Pros
Lightweight feel
Unlike heavier oils, this ester absorbs quickly and leaves no greasy residue, making it ideal for daytime wear or humid climates.
Low pore-clogging risk
Rated low on the comedogenic scale, so it's generally safe for acne-prone skin and won't contribute to breakouts.
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 independent research
Most safety data comes from manufacturer studies; there are fewer peer-reviewed studies compared to more common emollients like jojoba oil.
Best for
- People with normal to oily skin who prefer lightweight textures
- Anyone looking for a non-comedogenic emollient in moisturizers or makeup
Use caution if
- Those who strictly avoid all synthetic ingredients
- Individuals with known sensitivity to maleate esters (rare)
Usage tips
Safety summary
Generally recognized as safe for topical use in cosmetics. Skin irritation and sensitization are rare at typical concentrations. No significant systemic toxicity concerns have been identified.
Research notes
Safety assessments rely on manufacturer data and analog studies of similar esters. The CIR panel has not published a specific monograph for this ingredient, but related maleate esters are considered safe. More independent research would strengthen the evidence base.
Common label clues
- Typical concentration
- 1% to 10%
- Regulatory status
- Approved for use in cosmetics in the EU, US, and most major markets. The Cosmetic Ingredient Review (CIR) panel has reviewed similar maleate esters and found them safe at typical use levels.
- Common uses
- Moisturizers, Sunscreens, Foundations, Lip products
- Environmental note
- As a synthetic compound, its biodegradability is moderate. It is not derived from endangered plants or animals.
Good to know
- It is often used to improve the texture of mineral sunscreens, helping them blend without a chalky appearance.
- The name 'maleate' refers to its chemical parent, maleic acid, which is not related to male hormones or toxicity.
Common questions
What is Bis(1-Methylheptyl) Maleate in beauty products?
Bis(1-Methylheptyl) Maleate is a man-made oil-like ingredient that makes creams and lotions feel silky and spread easily on your skin. It doesn't leave a heavy or sticky residue, so it's often used in products that need a light, comfortable feel.
What does Bis(1-Methylheptyl) 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 texture. It also helps other ingredients spread evenly and can reduce the whitish cast sometimes left by sunscreens.
Is Bis(1-Methylheptyl) Maleate safe for most people?
Generally recognized as safe for topical use in cosmetics. Skin irritation and sensitization are rare at typical concentrations. No significant systemic toxicity concerns have been identified.
Who should be careful with Bis(1-Methylheptyl) Maleate?
Those who strictly avoid all synthetic ingredients Individuals with known sensitivity to maleate esters (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.