Ingredient review
Pentaerythrityl Hydrogenated Rosinate
INCI: Pentaerythrityl Hydrogenated Rosinate
A sticky resin that helps makeup stay put, but may clog pores for some skin types.
In plain English
This ingredient is a modified tree resin (from pine trees) that's been hydrogenated to make it more stable and less sticky. In cosmetics, it acts like a glue to help pigments and formulas stick to your skin or lashes longer, especially in waterproof or long-wear products. Think of it as the ingredient that keeps your mascara from smudging or your lipstick from fading quickly.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is useful, but some claims depend heavily on the formula.
Main practical flags: irritation is low; clogging risk is moderate.
- Source
- semi synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- moderate
Quick decision guide
Useful, but context matters
Pentaerythrityl Hydrogenated Rosinate can be useful, but watch for possible clogging concerns.
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 Pentaerythrityl 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
moderateMay be fine for many users but deserves caution if you are breakout-prone.
Evidence level
moderateThere is useful support, but formula details and claim strength still matter.
What it is
A synthetic ester made from pentaerythritol and hydrogenated rosin (a purified pine resin). It is a solid, brittle resin at room temperature that becomes flexible when mixed into cosmetic formulas.
How it works
When applied, it forms a thin, flexible film on the skin or lashes. This film physically locks in pigments and other ingredients, creating a water-resistant barrier that reduces smudging, flaking, and transfer.
Pros
Boosts makeup longevity
Creates a durable film that helps mascara, eyeliner, and lipstick resist smudging, flaking, and fading throughout the day.
Water-resistant barrier
Forms a protective layer that repels moisture, making it ideal for waterproof or sweat-resistant formulas.
Cons and cautions
Potential pore-clogging
Rates moderate on the comedogenic scale, meaning it may cause breakouts for those with acne-prone or oily skin.
Requires special removal
Because it's water-resistant, it often needs an oil-based or dual-phase makeup remover to fully cleanse away.
Best for
- People who want long-wearing, waterproof makeup
- Those with normal to dry skin looking for smudge-proof formulas
Use caution if
- Individuals with very oily or acne-prone skin, as it may clog pores
Usage tips
Safety summary
Considered safe for cosmetic use at typical concentrations. Low irritation risk, but moderate comedogenic potential means it may not suit everyone, especially those prone to acne.
Research notes
Limited independent studies on this specific ester, but rosin derivatives have a long history of safe use in cosmetics. The Cosmetic Ingredient Review (CIR) panel has reviewed similar rosin esters and found them safe as used.
Common label clues
- Typical concentration
- 1–10% in leave-on products
- Regulatory status
- Approved for use in cosmetics in the US (FDA), EU, and other major markets. No concentration restrictions, but formulators typically keep it under 10% in leave-on products.
- Common uses
- Mascara, Lipstick, Long-wear foundations, Eyeliners
- Environmental note
- Derived from pine trees, a renewable resource. However, the hydrogenation process involves chemical modification, so it's not considered a 'natural' ingredient.
Good to know
- Hydrogenation makes the rosin less sticky and more stable than natural pine resin.
- Commonly found in 'tubing' mascaras that form tiny tubes around lashes for easy removal with warm water.
Common questions
What is Pentaerythrityl Hydrogenated Rosinate in beauty products?
This ingredient is a modified tree resin (from pine trees) that's been hydrogenated to make it more stable and less sticky. In cosmetics, it acts like a glue to help pigments and formulas stick to your skin or lashes longer, especially in waterproof or long-wear products. Think of it as the ingredient that keeps your mascara from smudging or your lipstick from fading quickly.
What does Pentaerythrityl Hydrogenated Rosinate do in a beauty product?
When applied, it forms a thin, flexible film on the skin or lashes. This film physically locks in pigments and other ingredients, creating a water-resistant barrier that reduces smudging, flaking, and transfer.
Is Pentaerythrityl Hydrogenated Rosinate safe for most people?
Considered safe for cosmetic use at typical concentrations. Low irritation risk, but moderate comedogenic potential means it may not suit everyone, especially those prone to acne.
Who should be careful with Pentaerythrityl Hydrogenated Rosinate?
Individuals with very oily or acne-prone skin, as it may clog pores
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.