Ingredient review
Triethylene Glycol Hydrogenated Rosinate
INCI: Triethylene Glycol Hydrogenated Rosinate
A film-forming ingredient that helps makeup and sunscreen stay put longer without feeling overly sticky.
In plain English
This ingredient is a modified resin that creates a thin, flexible film on your skin or lashes. Think of it like a clear, invisible coat that helps makeup resist smudging, water, and sweat. It's often used in mascaras and long-wear foundations to keep them looking fresh for hours.
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
Triethylene Glycol Hydrogenated Rosinate 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 Triethylene Glycol Hydrogenated Rosinate.
- 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
Triethylene Glycol Hydrogenated Rosinate is a semi-synthetic polymer made by reacting hydrogenated rosin (a tree resin derivative) with triethylene glycol. It is a solid, tacky resin that dissolves in oils and some solvents, and it forms a smooth, water-resistant film when applied to skin or hair.
How it works
When applied in a cosmetic product, the solvent evaporates and leaves behind a thin, flexible film of the resin. This film physically adheres to the surface, locking in pigments and other ingredients. It also repels water, which helps the product resist running or smudging from sweat, rain, or tears.
Pros
Long-lasting wear
Creates a durable film that helps mascara, liner, and lip color stay put for hours without flaking or smudging.
Water and sweat resistant
Forms a barrier that repels moisture, making it ideal for humid conditions, workouts, or tear-prone eyes.
Cons and cautions
Can be hard to remove
The film is water-resistant, so you'll likely need an oil-based or dual-phase makeup remover to fully cleanse it away.
Potential tackiness
In high concentrations, the residue may feel slightly sticky or heavy on the skin, especially in lip products.
Best for
- Anyone wanting long-wearing mascara or eyeliner
- People who need sweat-resistant makeup for active days or humid climates
- Those who prefer smudge-proof lip products
Use caution if
- People with very sensitive eyes who find film-formers irritating
- Those who prefer easily removable, gentle makeup
Usage tips
Safety summary
Triethylene Glycol Hydrogenated Rosinate is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential. However, some individuals with very sensitive eyes may experience mild irritation from film-forming ingredients in mascaras or eyeliners.
Research notes
Safety assessments by the Cosmetic Ingredient Review (CIR) panel have evaluated hydrogenated rosin derivatives and found them safe for cosmetic use. No significant toxicity or sensitization concerns have been reported in published literature.
Common label clues
- Typical concentration
- Typically 1-10% in leave-on products
- Regulatory status
- Approved for use in cosmetics in the EU, US, and other major markets. No specific concentration limits are set, but it is generally recognized as safe when used as intended.
- Common uses
- Mascara, Eyeliners, Lipsticks, Long-wear foundations, Sunscreens
- Environmental note
- Derived from renewable pine rosin, but the hydrogenation and glycol modification involve chemical processing. Not known to be biodegradable in aquatic environments.
Good to know
- This ingredient is derived from pine tree rosin, making it a plant-based but heavily processed material.
- It is not water-soluble, so it won't wash off with plain water.
- Commonly found in 'waterproof' and 'long-wear' labeled cosmetics.
Common questions
What is Triethylene Glycol Hydrogenated Rosinate in beauty products?
This ingredient is a modified resin that creates a thin, flexible film on your skin or lashes. Think of it like a clear, invisible coat that helps makeup resist smudging, water, and sweat. It's often used in mascaras and long-wear foundations to keep them looking fresh for hours.
What does Triethylene Glycol Hydrogenated Rosinate do in a beauty product?
When applied in a cosmetic product, the solvent evaporates and leaves behind a thin, flexible film of the resin. This film physically adheres to the surface, locking in pigments and other ingredients. It also repels water, which helps the product resist running or smudging from sweat, rain, or tears.
Is Triethylene Glycol Hydrogenated Rosinate safe for most people?
Triethylene Glycol Hydrogenated Rosinate is considered safe for use in cosmetics at typical concentrations. It has low irritation and comedogenic potential. However, some individuals with very sensitive eyes may experience mild irritation from film-forming ingredients in mascaras or eyeliners.
Who should be careful with Triethylene Glycol Hydrogenated Rosinate?
People with very sensitive eyes who find film-formers irritating Those who prefer easily removable, gentle makeup
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.