Ingredient review
Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate
INCI: Pentaerythrityl Tetra-di-t-butyl Hydroxyhydrocinnamate
A synthetic antioxidant that helps keep your skincare products fresh and effective by preventing ingredient breakdown.
In plain English
This is a lab-made antioxidant that manufacturers add to creams, lotions, and serums to stop the oils and other ingredients from going bad. It works by neutralizing free radicals that cause spoilage, so your product stays stable and effective longer. It's not a direct skin treatment—it's more of a behind-the-scenes helper for the formula.
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
Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate 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 Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate.
- 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 phenolic antioxidant derived from pentaerythritol and a hindered phenol compound. It is widely used in cosmetics and personal care products to prevent oxidation of oils and other sensitive ingredients.
How it works
It donates hydrogen atoms to free radicals, breaking the chain reaction of oxidation. This protects the product's oils and active ingredients from becoming rancid or discolored, preserving the formula's quality and performance over time.
Pros
Preserves formula integrity
By preventing oxidation, it keeps your product's oils and actives from breaking down, so you get consistent performance from first use to last.
Very low irritation potential
Used at tiny concentrations and well-tolerated by most skin types, including sensitive skin, making it a safe choice for formulators.
Cons and cautions
Synthetic origin
It is not derived from natural sources, which may be a drawback for consumers seeking clean or natural beauty products.
No direct skin benefit
Its role is purely preservative—it doesn't provide antioxidant protection to your skin, only to the product itself.
Best for
- Anyone using products with oils or sensitive active ingredients
- People who want their skincare to stay fresh and effective longer
Use caution if
- Those seeking purely natural or plant-based formulations
Usage tips
Safety summary
Considered safe for use in cosmetics at typical concentrations. The CIR panel reviewed data and found no significant irritation, sensitization, or toxicity concerns. It is not a known endocrine disruptor.
Research notes
The safety of pentaerythrityl tetra-di-t-butyl hydroxyhydrocinnamate has been evaluated by the Cosmetic Ingredient Review (CIR) panel, which concluded it is safe in current usage practices. Studies show low acute toxicity and no significant skin irritation or sensitization.
Common label clues
- Typical concentration
- 0.001% to 0.5%
- Regulatory status
- Approved for use in cosmetics by the FDA and the European Commission. The Cosmetic Ingredient Review (CIR) panel has deemed it safe as used in rinse-off and leave-on products at typical concentrations.
- Common uses
- Moisturizers, Serums, Sunscreens, Lip products, Hair care
- Environmental note
- As a synthetic compound, it may not be readily biodegradable. However, its low usage concentration minimizes environmental impact.
Good to know
- This ingredient is also used in food packaging and industrial plastics, but cosmetic-grade versions are purified for safety.
- It is often listed under the trade name Irganox 1010.
Common questions
What is Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate in beauty products?
This is a lab-made antioxidant that manufacturers add to creams, lotions, and serums to stop the oils and other ingredients from going bad. It works by neutralizing free radicals that cause spoilage, so your product stays stable and effective longer. It's not a direct skin treatment—it's more of a behind-the-scenes helper for the formula.
What does Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate do in a beauty product?
It donates hydrogen atoms to free radicals, breaking the chain reaction of oxidation. This protects the product's oils and active ingredients from becoming rancid or discolored, preserving the formula's quality and performance over time.
Is Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate safe for most people?
Considered safe for use in cosmetics at typical concentrations. The CIR panel reviewed data and found no significant irritation, sensitization, or toxicity concerns. It is not a known endocrine disruptor.
Who should be careful with Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate?
Those seeking purely natural or plant-based formulations
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.