Ingredient review
Isotridecyl Laurate
INCI: Isotridecyl Laurate
A lightweight, non-greasy emollient that helps products glide on smoothly and leaves skin feeling soft without clogging pores.
In plain English
Isotridecyl Laurate is a synthetic oil-like ingredient made from lauric acid (a fatty acid found in coconut oil) and isotridecyl alcohol. It is used in skincare and makeup to make products feel silky and spread easily. Unlike heavy oils, it absorbs quickly and leaves a non-greasy finish, making it popular in lightweight moisturizers and sunscreens. It also helps other ingredients dissolve and 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
Isotridecyl Laurate 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 Isotridecyl Laurate.
- 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
Isotridecyl Laurate is an ester, meaning it is formed by combining an alcohol (isotridecyl alcohol) with a fatty acid (lauric acid). It is a clear, colorless liquid at room temperature and is produced synthetically for consistent quality and purity.
How it works
In a cosmetic product, Isotridecyl Laurate sits on the surface of the skin, filling in tiny gaps between skin cells to create a smooth, soft feel. It reduces friction, so the product spreads more easily, and it helps lock in moisture by forming a light barrier that slows water loss. It also acts as a solvent, helping to dissolve other ingredients like sunscreen filters or fragrances.
Pros
Lightweight feel
Unlike heavy oils, Isotridecyl Laurate absorbs quickly and leaves a silky, non-greasy finish, making it ideal for daytime moisturizers and makeup.
Low pore-clogging risk
It has a low comedogenic rating, so it is unlikely to cause breakouts, even for acne-prone skin.
Cons and cautions
Synthetic origin
It is manufactured in a lab, which may be a drawback for consumers seeking 100% natural or plant-derived ingredients.
Limited long-term data
While generally considered safe, there are fewer long-term studies on this specific ester compared to more common emollients like glycerin or squalane.
Best for
- People with normal to oily skin who prefer lightweight moisturizers
- Anyone looking for a non-comedogenic emollient in sunscreens or makeup
Use caution if
- Those with a known allergy to esters or lauric acid derivatives (rare)
Usage tips
Safety summary
Isotridecyl Laurate is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential, and no significant toxicity has been reported in available studies. As with any ingredient, patch testing is recommended for those with very sensitive skin.
Research notes
Research on Isotridecyl Laurate specifically is limited, but it belongs to a well-studied class of ester emollients. Safety assessments by the Cosmetic Ingredient Review (CIR) and the European Chemicals Agency (ECHA) support its use in leave-on and rinse-off products. Most data come from industry safety dossiers rather than independent clinical trials.
Common label clues
- Typical concentration
- 1% to 10%
- Regulatory status
- Approved for use in cosmetics in the EU, US, and many other countries. The Cosmetic Ingredient Review (CIR) panel has reviewed similar esters and found them safe at typical concentrations.
- Common uses
- Moisturizers, Sunscreens, Foundations, Lip products, Hair conditioners
- Environmental note
- As a synthetic ester, it is not biodegradable as quickly as some natural oils, but it is not known to bioaccumulate or cause significant environmental harm at typical usage levels.
Good to know
- Isotridecyl Laurate is often used in sunscreens to help chemical filters dissolve and spread evenly.
- It is considered a 'dry-touch' emollient, meaning it leaves a powdery or velvety finish rather than a shiny one.
Common questions
What is Isotridecyl Laurate in beauty products?
Isotridecyl Laurate is a synthetic oil-like ingredient made from lauric acid (a fatty acid found in coconut oil) and isotridecyl alcohol. It is used in skincare and makeup to make products feel silky and spread easily. Unlike heavy oils, it absorbs quickly and leaves a non-greasy finish, making it popular in lightweight moisturizers and sunscreens. It also helps other ingredients dissolve and mix well together.
What does Isotridecyl Laurate do in a beauty product?
In a cosmetic product, Isotridecyl Laurate sits on the surface of the skin, filling in tiny gaps between skin cells to create a smooth, soft feel. It reduces friction, so the product spreads more easily, and it helps lock in moisture by forming a light barrier that slows water loss. It also acts as a solvent, helping to dissolve other ingredients like sunscreen filters or fragrances.
Is Isotridecyl Laurate safe for most people?
Isotridecyl Laurate is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential, and no significant toxicity has been reported in available studies. As with any ingredient, patch testing is recommended for those with very sensitive skin.
Who should be careful with Isotridecyl Laurate?
Those with a known allergy to esters or lauric 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.