Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate



No known benefits

Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate at a glance

  • Synthetic ingredient that works as an antioxidant
  • Helps ensure consistent efficacy and stability of other antioxidants
  • Prevents unwanted colour changes in cosmetics
  • Works best in products that contain fats and oils

Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate description

Pentaerythrityl tetra-di-t-butyl hydroxyhydrocinnamate is a synthetic, odorless antioxidant often added to skin care formulas such as sunscreens to ensure consistent efficacy and stability of other, more fragile antioxidants. A little goes a long way: the recommended usage level of pentaerythrityl tetra-di-t-butyl hydroxyhydrocinnamate is between 0.01-0.1%. The safety assessment of this ingredient looked at concentrations from 0.0001%-0.8% as used in leave-on products. It’s typically used in concentrations of 0.5% or less in rinse-off formulas. Its oil-soluble nature means it pairs best with other oils and fats in a formula. Although it is available and can be used on its own, this antioxidant is commonly used in a blend with other ingredients such as emollient squalane and film-forming polymers as more of a “total package” of stability, texture enhancing, creating stick formulas (as in lipstick and sunscreen sticks), and also serving as an alternative to silicone ingredients. It is frequently used to protect natural oils, fragrances, and butters from oxidation. The high molecular weight of pentaerythrityl tetra-di-t-butyl hydroxyhydrocinnamate does not penetrate past skin’s surface. It is considered safe as used in cosmetics.

Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate references

  • International Journal of Toxicology, December 2018, pages 80S-89S

Peer-reviewed, substantiated scientific research is used to assess ingredients in this dictionary. Regulations regarding constraints, permitted concentration levels and availability vary by country and region.

Ingredient ratings


Proven and supported by independent studies. Outstanding active ingredient for most skin types or concerns.


Necessary to improve a formula's texture, stability, or penetration.


Generally non-irritating but may have aesthetic, stability, or other issues that limit its usefulness.


There is a likelihood of irritation. Risk increases when combined with other problematic ingredients.


May cause irritation, inflammation, dryness, etc. May offer benefit in some capability but overall, proven to do more harm than good.


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Not rated

We have not yet rated this ingredient because we have not had a chance to review the research on it.